Bariatric Surgery Malpractice in Turkey: Rights of International Patients

Turkey has become an important destination for international patients seeking bariatric and metabolic surgery, including procedures commonly described as gastric sleeve surgery, sleeve gastrectomy, stomach reduction surgery and gastric bypass surgery.

Patients may travel to Turkey because of shorter waiting periods, package prices, experienced surgical teams or access to private healthcare institutions.

Most patients expect to remain in Turkey for only a relatively short period before returning to their home country.

That international treatment model creates a particular legal problem when a serious complication develops after discharge.

A patient may return to the United Kingdom and develop severe abdominal pain.

Another may arrive home in Germany with fever and tachycardia and later be diagnosed with a gastric leak and sepsis.

A patient may suffer a pulmonary embolism shortly after surgery.

Another may require emergency revision surgery, prolonged intensive-care treatment or even removal of part or all of the stomach.

In fatal cases, the patient’s family may be told that death resulted from a recognised complication of bariatric surgery.

At that point, the most important legal question becomes:

Was this an unavoidable complication, or did medical malpractice contribute to the patient’s injury or death?

The distinction is critical.

Sleeve gastrectomy and other bariatric procedures are major surgical interventions. Medical literature recognises complications including staple-line leakage, bleeding, stenosis and thrombotic events; leaks in particular may require urgent and multidisciplinary treatment.

The fact that such complications are medically recognised, however, does not automatically mean that the surgeon or hospital cannot be responsible.

Turkish malpractice law requires examination of the entire treatment process:

• Was the patient an appropriate candidate for surgery?
• Was adequate preoperative assessment performed?
• Was the hospital properly equipped for a bariatric patient?
• Was the surgery technically appropriate?
• Were thrombosis and other recognised risks appropriately assessed?
• Was the patient properly monitored after surgery?
• Were warning symptoms recognised in time?
• Was a leak, embolism, infection or bleeding event treated appropriately?
• Was the patient discharged too early?
• Was valid informed consent obtained?
• Did a delay in treatment cause additional injury?

Turkish Court of Cassation jurisprudence concerning obesity surgery demonstrates that these questions require detailed specialist analysis and cannot be answered simply by labelling the outcome a “complication.”

Is Bariatric Surgery Treated Like Cosmetic Surgery Under Turkish Law?

Generally, bariatric surgery should be distinguished from purely aesthetic procedures.

A patient undergoing rhinoplasty or another purely cosmetic intervention may be seeking an agreed aesthetic result, and Turkish Court of Cassation jurisprudence can classify such procedures as contracts for work involving a result obligation.

Bariatric surgery is ordinarily different.

Sleeve gastrectomy and gastric bypass are therapeutic medical interventions aimed at treating obesity and related health risks.

The physician does not normally promise:

“You will definitely lose exactly 50 kilograms.”

Nor does the surgeon ordinarily guarantee that every comorbidity will disappear after surgery.

Instead, the principal obligation is one of professional medical care and diligence.

This distinction is reflected directly in a Court of Cassation obesity-surgery case.

In Yargıtay 3rd Civil Chamber, E. 2021/5210, K. 2022/211, dated 20 January 2022, a patient underwent stomach-reduction surgery at a private hospital and later died. The Court expressly described the compensation dispute as arising from a mandate relationship — vekâlet sözleşmesi and emphasised the doctor’s high professional duty of care.

Accordingly, a foreign bariatric patient should not usually structure the legal claim simply around:

“I did not lose enough weight.”

The stronger malpractice questions concern the safety and quality of the medical care.

A Poor Weight-Loss Result Is Not Automatically Malpractice

Bariatric surgery can produce different results in different patients.

Weight loss may depend on:

• anatomy;
• metabolism;
• pre-existing disease;
• diet;
• postoperative compliance;
• lifestyle;
• type of surgery.

A disappointing degree of weight loss does not automatically prove that the surgeon committed malpractice.

The legal issue becomes different if the patient alleges that:

• the wrong procedure was selected;
• the operation was technically defective;
• postoperative stenosis prevented appropriate nutrition;
• a preventable complication caused permanent damage;
• the patient received inadequate follow-up.

Therefore:

unsatisfactory weight loss and medical malpractice should not be treated as identical concepts.

The Most Important Bariatric Malpractice Question: Was the Patient Properly Selected?

A malpractice case can begin before the first incision.

Bariatric surgery is major surgery, and the healthcare team must appropriately evaluate whether the patient is suitable for the proposed procedure.

A legal investigation may therefore consider:

• medical history;
• previous operations;
• cardiac condition;
• respiratory condition;
• endocrine disease;
• medication;
• thrombosis history;
• other relevant comorbidities;
• ability to tolerate major surgery.

The Court of Cassation’s 2022 obesity-surgery judgment is particularly instructive.

The Court criticised the existing expert reports as insufficient and required a multidisciplinary academic expert panel to examine, among other issues:

• whether the patient could tolerate the surgical intervention;
• whether preoperative examinations were adequate;
• whether the defendant hospital had adequate facilities for obese patients;
• whether the absence of particular diagnostic equipment had created a deficiency in treatment.

This decision makes an important point for foreign patients:

Bariatric malpractice is not limited to whether the surgeon correctly stapled the stomach.

Preoperative patient selection and hospital capacity can themselves become central liability issues.

Can a Hospital Be Responsible Even If the Surgeon Performed the Operation Correctly?

Potentially, yes.

Bariatric surgery requires more than a surgeon.

Safe treatment can depend on:

• anaesthesia;
• nursing;
• laboratory facilities;
• radiology;
• emergency imaging;
• intensive care;
• specialist consultation;
• postoperative monitoring;
• rapid management of complications.

The 2022 Court of Cassation obesity-surgery case expressly required investigation of whether the hospital had adequate infrastructure for obese patients and whether the absence of a CT scanner affected treatment.

That is a very important legal principle.

A surgeon may make an appropriate medical decision, but a patient can still suffer because the healthcare institution lacks the organisation or equipment necessary to safely manage a bariatric complication.

A hospital therefore cannot necessarily answer a malpractice claim by saying:

“The complication belongs to the surgeon.”

Hospital organisation must be examined independently.

Gastric Leak After Sleeve Gastrectomy

A staple-line leak is among the best-known serious complications associated with sleeve gastrectomy.

Medical literature describes leakage as a potentially life-threatening complication requiring prompt recognition and specialised multidisciplinary management. Clinical warning signs can include tachycardia, fever and respiratory changes, and treatment may require surgical, endoscopic, radiological and intensive-care resources depending on the patient’s condition.

But:

A gastric leak is not automatically malpractice.

A leak may occur despite medically appropriate surgery.

The legal analysis should therefore examine several separate questions.

Was the Leak Caused by Technical Surgical Error?

Experts may need to consider:

• staple-line technique;
• tissue handling;
• sleeve construction;
• whether the surgical method complied with accepted standards.

Medical literature recognises that several mechanisms can contribute to leakage, including mechanical and ischemic factors, and that stapling technique can be relevant in some cases.

Accordingly, a provider cannot establish absence of liability merely by stating:

“Leaks happen after sleeve gastrectomy.”

The cause in the individual patient must be analysed.

Was the Gastric Leak Recognised in Time?

This can be even more important than whether the leak itself was preventable.

Imagine the following situation.

A patient undergoes sleeve gastrectomy in Istanbul.

Two days later the patient develops:

• rapid heart rate;
• fever;
• severe abdominal pain;
• weakness;
• difficulty breathing.

The patient contacts the clinic.

The clinic responds:

“This is normal after gastric sleeve surgery.”

The patient is discharged or told to wait.

Twenty-four hours later, the patient’s condition deteriorates dramatically.

A CT examination eventually demonstrates leakage and widespread infection.

In that case, the original leak might theoretically have been an unavoidable complication.

But the legal case may concern:

the delay in diagnosis and treatment.

This distinction is crucial.

Complication Versus Negligent Complication Management

A recognised complication does not give the healthcare provider immunity from everything that happens afterwards.

Once a complication develops, healthcare professionals must respond according to accepted medical standards.

Questions can include:

• Was the patient’s heart rate monitored?
• Was blood testing performed?
• Was urgent imaging considered?
• Was a surgeon available?
• Was the patient admitted rather than sent back to the hotel?
• Was intensive-care treatment necessary?
• Was endoscopy or revision surgery organised in time?

Medical literature emphasises that serious bariatric complications can require specialised multidisciplinary management and that timely recognition is important.

From a legal perspective, an unavoidable leak can therefore coexist with negligent management.

Sepsis After Bariatric Surgery

A leak or intra-abdominal infection can potentially develop into sepsis.

Where that occurs, the key malpractice issue often becomes timing.

When did warning signs begin?

When did the patient first communicate those symptoms?

When did the hospital investigate?

When was the diagnosis made?

When was treatment started?

A delay that materially worsens the patient’s condition can become a basis for liability even where the original surgical complication was unavoidable.

Foreign patients should therefore preserve a detailed chronology.

WhatsApp Messages Can Become Critical Evidence

International bariatric patients frequently communicate with the clinic through WhatsApp after discharge.

Messages can show exactly when warning symptoms appeared.

For example:

Patient: “My heart rate is 130 and I have severe pain.”

Clinic: “This is normal.”

Patient: “I have a fever and cannot drink.”

Clinic: “Wait until tomorrow.”

If the patient later undergoes emergency treatment for a leak or sepsis, those messages may become highly significant.

Preserve the complete conversation.

Do not keep only one screenshot.

Dates, times, sender identity and surrounding messages can all matter.

Pulmonary Embolism After Bariatric Surgery

Pulmonary embolism is another recognised serious postoperative risk in bariatric surgery.

The existence of embolism does not automatically prove malpractice.

But neither does the phrase:

“pulmonary embolism is a known complication”

automatically defeat the claim.

The Court of Cassation addressed exactly this type of problem in E. 2021/5210, K. 2022/211.

The initial expert report concluded that the patient likely died from pulmonary embolism, described as a complication of obesity surgery, and that the doctors had not committed malpractice.

The Court of Cassation nevertheless found the report insufficient.

It required a new multidisciplinary expert assessment addressing the family’s objections and examining the adequacy of preoperative testing, hospital facilities and the medical process as a whole.

This is extremely important.

The Court did not say:

“Pulmonary embolism is a complication, therefore the case is finished.”

It required a deeper investigation.

Thrombosis Prevention and Risk Assessment

Where pulmonary embolism or another thromboembolic event occurs, a malpractice investigation may examine whether the patient received care consistent with the applicable medical standard.

This can involve patient-specific issues such as:

• mobility;
• risk factors;
• comorbidities;
• perioperative preventive strategy;
• postoperative monitoring.

The precise medical standard must be determined by appropriate specialists.

The legal article cannot replace a medical expert opinion.

But the relevant principle is straightforward:

recognition of embolism as a possible complication does not eliminate the need to examine whether the risk was managed appropriately.

Bleeding After Gastric Sleeve Surgery

Postoperative bleeding is another recognised sleeve-gastrectomy complication.

Again, occurrence alone does not prove malpractice.

The legal questions can include:

• Was there a technical source of bleeding?
• Were postoperative blood values properly monitored?
• Did the patient show signs of haemodynamic deterioration?
• Was treatment delayed?
• Was revision surgery required?

A healthcare provider may have no responsibility for the initial occurrence of bleeding but potentially bear responsibility for a delay that caused additional injury.

Gastric Stenosis or Obstruction

Sleeve stenosis is also recognised among postoperative complications of sleeve gastrectomy.

A patient may experience:

• persistent vomiting;
• inability to tolerate food;
• inability to tolerate liquids;
• substantial nutritional problems.

A malpractice inquiry may examine whether:

• surgical construction was appropriate;
• symptoms were recognised;
• diagnostic procedures were performed;
• appropriate endoscopic or surgical treatment was provided.

Again, “known complication” and “no liability” are not synonyms.

Organ Loss After Bariatric Surgery

Some bariatric malpractice cases result in catastrophic permanent injury.

A particularly notable Court of Cassation insurance case involved a patient who underwent stomach-reduction surgery at a private hospital, deteriorated after the operation and ultimately had the stomach completely removed.

The patient alleged permanent organ loss and relied on a 50% permanent-disability report in proceedings involving the physician’s compulsory medical malpractice liability insurer.

In Yargıtay 11th Civil Chamber, E. 2023/5918, K. 2023/6665, dated 20 November 2023, the Court did not finally determine the underlying medical negligence itself; instead, it emphasised that the degree of permanent disability had to be established by a properly qualified institutional medical assessment before compensation could be calculated. The decision reversed the insurance arbitration ruling because the claimant’s submitted disability report had been accepted without the required specialist assessment.

The case provides an important lesson:

Serious injury must still be proven properly.

Organ loss, disability and future financial consequences need specialist documentation.

Death After Bariatric Surgery

Bariatric malpractice becomes particularly serious when the patient dies.

A fatal outcome does not automatically prove negligence.

But death also cannot simply be dismissed as a complication without a thorough investigation.

The Court of Cassation’s 2022 obesity-surgery case concerned exactly such circumstances.

The patient had stomach-reduction surgery at a private hospital, was discharged and subsequently deteriorated. According to the claim, the patient was repeatedly evaluated and eventually transferred before dying.

The first expert report suggested pulmonary embolism and no professional fault.

The Court of Cassation held that the existing reports did not adequately answer the family’s allegations and required a detailed multidisciplinary academic expert examination.

Another Court of Cassation Bariatric Death Investigation

An earlier criminal-law judgment provides another useful example.

In Yargıtay 12th Criminal Chamber, E. 2018/3638, K. 2018/7736, a patient underwent stomach-reduction surgery at a university research hospital, was discharged and died shortly afterwards.

One forensic report had concluded that a causal relationship between surgery and death could not be established.

However, a Ministry of Health disciplinary investigation had identified potential deficiencies, including questions concerning required tests and postoperative cardiology and endocrinology consultations.

Because those reports conflicted, the Court of Cassation held that the contradiction needed further expert resolution rather than simply accepting the first conclusion and closing the investigation.

Although this is a criminal-procedure decision and does not by itself establish civil compensation liability, it demonstrates an important evidential principle:

Conflicting expert opinions in a fatal bariatric case must be properly examined.

Bariatric Surgery Requires the Right Expert Panel

One of the strongest lessons from Turkish Court of Cassation jurisprudence is that medical malpractice cannot be decided through superficial expert analysis.

The 2022 obesity-surgery judgment required a multidisciplinary panel of university academics because the patient’s condition involved several interconnected medical issues.

The Court required examination not merely of surgical technique but also:

• preoperative assessment;
• ability to tolerate surgery;
• hospital infrastructure;
• postoperative events;
• possible embolism;
• causation.

Foreign patients should therefore scrutinise an expert report that says only:

“Pulmonary embolism is a known complication; no malpractice exists.”

A useful report should explain why there was no malpractice.

What Should a Proper Bariatric Malpractice Expert Report Address?

Depending on the case, a comprehensive report may need to answer:

1. Was bariatric surgery medically appropriate for this patient?
2. Was sufficient preoperative assessment performed?
3. Were material risk factors identified?
4. Was the selected operation medically appropriate?
5. Was surgical technique consistent with accepted practice?
6. Did a recognised complication occur?
7. Was the complication preventable?
8. When should it reasonably have been diagnosed?
9. Was treatment timely and appropriate?
10. Was the hospital appropriately equipped?
11. Did any delay cause additional damage?
12. Did the patient’s own conduct contribute to the outcome?
13. What permanent injury resulted?

A report that does not answer the actual allegations may need to be challenged.

Informed Consent Before Bariatric Surgery

Bariatric surgery is a major elective intervention in many cases.

Valid informed consent is therefore essential.

The current Patient Rights Regulation applies to both public and private healthcare institutions and protects the patient’s right to information and consent.

For interventions likely to create disputes, the Regulation requires a consent form containing the relevant medical information; the information in the form must also be communicated verbally, and copies are to be signed and provided in accordance with the regulation.

A signature alone is therefore not the entire consent process.

What Should a Bariatric Patient Be Told?

The exact content depends on the individual case.

However, informed consent can require meaningful information concerning:

• nature of the surgery;
• expected purpose;
• important alternatives;
• significant foreseeable risks;
• possible complications;
• postoperative requirements.

For an international patient, this may include material risks such as:

• leakage;
• bleeding;
• thromboembolic complications;
• need for revision surgery;
• possibility of serious infection.

The specific risks that should have been disclosed must be evaluated according to the intervention and patient.

Foreign Patients and Language Barriers

A UK patient who does not speak Turkish may receive several Turkish-language forms immediately before surgery.

The patient may be told:

“These are standard hospital documents.”

That situation can create a serious informed-consent issue.

Turkish patient-rights law is concerned with genuine information and consent, not merely collecting signatures.

If the patient did not understand the document and the provider cannot show that the procedure and important risks were meaningfully explained, informed consent may become an independent part of the malpractice dispute.

Patients should preserve every consent document they received.

Is Bariatric Surgery Malpractice a Consumer Case?

Where a foreign patient purchases bariatric treatment from a private hospital or private healthcare provider for personal purposes, the dispute will commonly fall within the consumer-law framework.

This is reflected directly in the Court of Cassation’s 2022 obesity-surgery case, which originated before İzmir 8th Consumer Court.

For 2026, consumer disputes below 186,000 TL fall within the monetary jurisdiction of Consumer Arbitration Committees.

For disputes at or above that level, the Ministry of Trade states that the relevant route is mandatory mediation under Article 73/A followed, if necessary, by Consumer Court litigation.

Serious bariatric malpractice claims involving permanent disability, intensive-care expenses, major corrective treatment or death will frequently exceed that monetary threshold.

Private Hospital or Public Hospital?

The route changes where bariatric surgery was performed at a state hospital or another public healthcare institution.

Public hospital malpractice is generally pursued through administrative-law compensation procedures rather than the private consumer route.

Article 13 of the Administrative Procedure Law requires a person injured by administrative conduct to make the relevant prior application to the administration within one year from learning of the conduct and in any event within five years from the conduct, before the subsequent full-remedy litigation process.

This distinction is important for foreign patients because the wrong procedural route can cause serious delay.

International Health Tourism Rules

Foreign bariatric patients travelling specifically to Turkey for treatment are also affected by Turkey’s current international health-tourism regulatory framework.

The International Health Tourism and Tourist Health Regulation, published on 26 April 2025, replaced the earlier 2017 regulation and introduced updated authorisation and service standards for healthcare facilities and intermediary organisations operating in the international health-tourism sector.

Accordingly, a bariatric patient should identify:

• which healthcare facility provided the surgery;
• whether a medical tourism intermediary was involved;
• who received the treatment payment;
• who issued the medical invoice;
• who provided postoperative communication.

The clinic’s Instagram or commercial brand name may not necessarily identify the legal healthcare provider.

Important 2026 Development: Complication Insurance

The April 2025 Regulation originally introduced a requirement for complication insurance for international health-tourism surgical and interventional procedures performed in operating-room settings.

However, the legal position changed before and during 2026.

The Turkish Medical Association reported that the 10th Chamber of the Council of State, in a decision dated 25 December 2025, stayed execution of the regulation’s compulsory complication-insurance provision.

A separate professional-body challenge also resulted in a reported stay of execution concerning the complication-insurance requirement and the regulation’s use of “complication” within the relevant responsibility provision, with the underlying judicial proceedings continuing.

Therefore, as of September 2026, it would be misleading to tell a foreign bariatric patient that compulsory complication insurance simply applies exactly as originally written in April 2025.

The current position should be checked when the actual claim arises.

Most importantly:

the stay concerning complication insurance does not abolish ordinary medical malpractice liability.

Contractual, consumer, tort, informed-consent and public-law compensation principles remain separate.

Who Can Be Responsible for Bariatric Malpractice?

Depending on the case, potential responsibility may involve:

• the operating surgeon;
• the private hospital;
• other healthcare professionals;
• the medical tourism intermediary within its own contractual role;
• the responsible public administration in public-hospital treatment.

The legal analysis should identify each actor separately.

Can the Hospital Be Sued Together With the Surgeon?

Potentially, yes.

The 2022 Court of Cassation obesity-surgery case itself involved allegations against both the doctor and private hospital.

The Court specifically required investigation of whether the hospital had adequate facilities and whether hospital-level deficiencies contributed to the patient’s death.

This demonstrates why foreign patients should not assume that bariatric malpractice is always:

“patient versus surgeon.”

It may also be:

“patient versus surgeon and hospital.”

Medical Tourism Intermediary Liability

A bariatric patient may have arranged surgery through a medical tourism company.

The intermediary may have:

• advertised the package;
• communicated with the patient;
• arranged airport transfer;
• organised accommodation;
• scheduled surgery;
• provided translation.

Its legal responsibility depends on what it actually undertook.

An intermediary is not automatically responsible for every technical surgical act merely because it arranged the journey.

But if it:

• misrepresented the healthcare provider;
• promised particular services;
• provided dangerous postoperative advice;
• failed within obligations it expressly undertook,

its role may need separate examination.

What Compensation Can a Foreign Bariatric Patient Claim?

Where liability is established, compensation may potentially cover several categories.

Article 54 of the Turkish Code of Obligations identifies bodily injury losses including:

• medical treatment expenses;
• loss of earnings;
• loss or reduction of working capacity;
• impairment of economic prospects.

In a serious bariatric malpractice case, this can potentially include:

• emergency revision surgery;
• intensive-care treatment;
• treatment of sepsis;
• corrective gastrointestinal surgery;
• rehabilitation;
• medically necessary long-term treatment;
• documented income loss.

The existence and amount of each claim must be proven.

Corrective Treatment Abroad

A patient does not automatically lose the right to claim treatment expenses because emergency care occurs outside Turkey.

Suppose a patient develops a gastric leak after returning to London.

A British hospital performs:

• emergency imaging;
• drainage;
• endoscopic treatment;
• revision surgery.

Those foreign records can potentially become highly important evidence in the Turkish claim.

The patient should preserve:

• admission records;
• CT images;
• operative report;
• discharge summary;
• invoices;
• proof of payment.

The medical records can prove both the seriousness of the complication and the treatment required.

Permanent Disability After Bariatric Malpractice

Some complications can result in permanent consequences.

Examples may include:

• organ loss;
• chronic digestive impairment;
• permanent nutritional problems;
• long-term functional disability.

The 2023 Court of Cassation insurance case involving complete stomach removal demonstrates why permanent impairment should be assessed through appropriate specialist medical evidence rather than merely asserted by the claimant.

For foreign patients, medical reports from the home country can be useful but may need to be supplemented by the expert evidence required in Turkish proceedings.

Loss of Earnings

A patient may be unable to work for months after a serious bariatric complication.

Foreign patients should preserve:

• employment contract;
• salary statements;
• employer confirmation;
• tax records;
• medical certificates.

The fact that the patient earns income in pounds, euros or another currency does not mean those losses are irrelevant.

The actual income loss should be documented and properly calculated.

Moral Damages

Severe medical injury can also create significant non-material suffering.

Turkish Code of Obligations Article 56 allows an appropriate non-material damages award where bodily integrity has been injured.

Relevant circumstances may include:

• severe pain;
• multiple emergency surgeries;
• permanent organ damage;
• prolonged intensive care;
• permanent disability;
• major psychological suffering.

The amount is determined individually.

There is no fixed bariatric-malpractice tariff.

What If the Patient Dies?

Turkish Code of Obligations Article 53 identifies categories of loss arising from death, including:

• funeral expenses;
• treatment and work-loss expenses where death was not immediate;
• loss suffered by persons deprived of the deceased’s financial support.

Close relatives may also potentially pursue appropriate moral damages under the applicable rules.

Fatal bariatric cases require especially careful causation analysis.

The legal question is not merely:

“Did death happen after surgery?”

It is:

“Did negligent treatment, monitoring or complication management cause or materially contribute to death?”

Can a Criminal Investigation Also Be Started?

Potentially.

Where alleged medical negligence causes serious injury or death, criminal-law issues can arise separately from the compensation case.

The 2018 Court of Cassation stomach-reduction decision arose in a criminal investigation and demonstrates that medical reports may need to be reconciled before prosecutors can reliably determine whether criminal proceedings should continue.

However:

criminal proceedings and compensation proceedings are different.

A criminal complaint does not automatically recover the patient’s financial damages.

Likewise, a civil or consumer compensation claim does not automatically establish criminal guilt.

What Evidence Should a Foreign Bariatric Patient Preserve?

A strong bariatric malpractice file can include:

1. Treatment agreement.
2. Medical tourism package.
3. Payment records.
4. Hospital invoice.
5. Preoperative consultations.
6. Blood-test results.
7. Cardiology or respiratory assessments where applicable.
8. Anaesthesia records.
9. Operative report.
10. Consent forms.
11. Nursing records.
12. Vital-sign charts.
13. Postoperative laboratory results.
14. Imaging.
15. Discharge summary.
16. WhatsApp and email messages.
17. Emergency treatment records after returning home.
18. Revision surgery reports.
19. Proof of treatment expenses.
20. Income-loss evidence.

The goal is to reconstruct the treatment minute by minute and day by day where necessary.

Why the Discharge Date Matters

International medical tourism often creates commercial pressure to operate within short travel schedules.

But discharge must remain a medical decision, not simply a package-management decision.

A patient should not be discharged merely because:

• the hotel booking begins;
• the package includes only a limited hospital stay;
• a return flight has already been purchased.

If the patient’s medical condition required additional observation, early discharge may become relevant to malpractice.

The key expert question is:

Would continued hospital observation probably have identified the complication sooner or changed the outcome?

Flying Home After Bariatric Surgery

Foreign patients commonly ask whether a clinic can be responsible for permitting them to travel home too soon.

There is no universal legal answer based solely on a particular number of days.

The medical appropriateness of travel depends on the patient’s condition, procedure and relevant risks.

However, where the healthcare provider specifically advises the patient that long-distance travel is medically safe, that advice can become part of the factual record.

Patients should preserve written travel recommendations and discharge instructions.

What If the Clinic Says “You Left Turkey, So We Are Not Responsible”?

Returning home does not automatically extinguish malpractice rights.

A complication can become apparent only after the patient leaves Turkey.

Modern bariatric complications can manifest after discharge, and some require urgent reassessment.

The important legal question remains what occurred during and after the Turkish treatment.

A foreign patient can potentially pursue the Turkish claim after returning home through appropriately authorised Turkish counsel.

Do You Need to Return to Turkey to Sue?

Not ordinarily simply to start the case.

A foreign patient can potentially appoint Turkish counsel from abroad.

The lawyer may then:

• obtain medical records;
• analyse the hospital and surgeon;
• arrange independent expert review;
• commence mandatory mediation;
• file Consumer Court proceedings;
• submit foreign treatment documents.

Whether personal attendance becomes necessary later depends on the individual case, especially where permanent disability requires direct medical examination.

Can the Hospital Say the Patient Caused the Complication?

Patient conduct can sometimes be relevant.

For example, the defence may allege that the patient:

• failed to disclose medical history;
• refused recommended tests;
• ignored medication instructions;
• failed to attend urgent follow-up;
• travelled despite explicit medical advice.

These facts need to be proven.

A patient should therefore preserve written postoperative instructions.

If the patient followed the clinic’s advice exactly, that can be important evidence.

A Practical Example: Gastric Leak After Returning to the UK

A British patient undergoes sleeve gastrectomy in Turkey.

After discharge, she reports fever, severe abdominal pain and rapid heart rate.

The clinic tells her through WhatsApp that the symptoms are normal.

She flies home.

The following day, an NHS hospital identifies a major gastric leak and sepsis.

She requires intensive care and multiple procedures.

The Turkish malpractice investigation should examine:

• whether the leak was technically preventable;
• whether symptoms before discharge indicated leakage;
• whether the patient should have undergone imaging;
• whether she should have remained hospitalised;
• whether travel advice was appropriate;
• whether delayed diagnosis worsened sepsis.

Simply proving that leakage is a known sleeve-gastrectomy complication would not answer those questions.

Example: Pulmonary Embolism and Death

A patient undergoes bariatric surgery and dies shortly after discharge.

The hospital says pulmonary embolism was an unavoidable complication.

The family’s legal analysis should ask:

• Was risk properly assessed before surgery?
• Was postoperative care consistent with the applicable standard?
• Were warning symptoms recognised?
• Did the hospital have adequate facilities?
• Was emergency transfer timely?

The Court of Cassation’s 2022 obesity-surgery judgment shows that a general expert conclusion identifying pulmonary embolism as a complication may be insufficient if it does not address detailed allegations concerning hospital capacity and treatment.

Example: Serious Organ Loss

A patient undergoes stomach-reduction surgery.

Complications eventually require removal of the stomach and leave the patient with permanent disability.

The claim will require separate proof of:

medical negligence, and

the degree of permanent impairment.

The Court of Cassation’s 2023 medical malpractice insurance decision illustrates the importance of obtaining a properly qualified disability assessment before calculating compensation.

Frequently Asked Questions

Is a gastric leak after sleeve surgery automatically malpractice?

No. A gastric leak is a recognised complication. Liability depends on why it occurred, whether the patient was adequately informed and whether the leak was recognised and managed according to accepted medical standards.

Can delayed treatment of a gastric leak be malpractice?

Potentially, yes. An unavoidable complication can still result in liability where negligent delay causes additional injury such as severe infection or sepsis.

Is pulmonary embolism automatically a complication with no compensation?

No. Pulmonary embolism is a recognised postoperative complication, but the Court of Cassation has required detailed examination of bariatric cases rather than treating the complication label as automatically decisive.

Can a hospital be responsible for bariatric malpractice?

Yes, potentially. The 2022 Court of Cassation obesity-surgery judgment specifically required examination of whether the hospital had adequate facilities for obese patients and whether infrastructure deficiencies affected treatment.

Can a surgeon be responsible if surgery was technically correct?

Potentially, where there was another breach such as inadequate informed consent or negligent postoperative management.

Does signing a consent form prevent a bariatric malpractice lawsuit?

No. A consent form does not authorise negligent treatment. Turkish patient-rights law also requires meaningful information and consent, not merely a signature.

What if the consent form was only in Turkish?

That can be important for an international patient who did not understand Turkish. The adequacy of the actual information process should be investigated.

Is bariatric surgery treated as an aesthetic works contract?

Ordinarily it should be distinguished from purely aesthetic surgery. The Court of Cassation’s obesity-surgery malpractice jurisprudence has treated the medical relationship as mandate-based, focusing on professional care rather than guaranteed weight loss.

Can I claim if I did not lose enough weight?

Insufficient weight loss alone does not automatically establish malpractice. The underlying medical treatment and cause of the outcome need to be examined.

Can I claim revision surgery expenses abroad?

Potentially, where the corrective treatment is medically necessary and causally connected to negligent Turkish treatment.

Can I claim lost salary?

Potentially. Turkish Code of Obligations Article 54 recognises lost earnings and working-capacity losses among bodily injury damages.

Can I claim moral damages?

Potentially, where bodily integrity has been harmed and the legal conditions are established.

Can the family claim compensation if the patient dies?

Potentially. Turkish law recognises funeral costs, certain treatment/work-loss losses before death and loss-of-support damages, while close relatives may also have appropriate moral-damages claims.

Which court handles private bariatric malpractice?

Private personal healthcare disputes commonly fall within Consumer Court jurisdiction. The Court of Cassation’s 2022 obesity-surgery case itself originated before a Consumer Court.

Is mediation required?

For Consumer Court disputes, mandatory mediation generally applies before litigation unless a statutory exception exists.

What is the 2026 Consumer Arbitration Committee threshold?

For 2026, disputes below 186,000 TL fall within the Consumer Arbitration Committee monetary jurisdiction.

What if surgery was at a state hospital?

The public-hospital route is generally different and can require a preliminary administrative application under Article 13 of Law No. 2577 before full-remedy litigation.

Is complication insurance mandatory for foreign bariatric patients in 2026?

The 2025 Regulation originally introduced a compulsory complication-insurance requirement, but the Council of State stayed execution of that provision. The legal status should therefore be checked at the date of the individual claim.

Do I need to come back to Turkey to make a claim?

Not necessarily. Many steps can potentially be handled through properly authorised Turkish counsel while the patient remains abroad.

Conclusion: A Serious Bariatric Complication Should Be Investigated, Not Merely Labelled

Bariatric surgery malpractice claims in Turkey require particularly careful analysis because the procedures involve significant medical risks while many international patients remain in Turkey only briefly.

A foreign patient may undergo surgery on Monday, be discharged several days later and return to another country shortly afterwards.

If a serious complication then appears, the legal investigation may span several countries.

The Turkish operation records may show what happened during surgery.

WhatsApp messages may show what symptoms were reported after discharge.

A British, German or French hospital may provide the records proving when leakage, embolism, infection or organ damage was eventually diagnosed.

All of those documents may need to be examined together.

The central legal distinction remains:

complication versus malpractice.

Sleeve gastrectomy can genuinely produce complications despite appropriate medical care.

Medical literature recognises leakage, bleeding, stenosis and thromboembolic events among the important complications associated with bariatric surgery.

Therefore, a gastric leak does not automatically prove malpractice.

Pulmonary embolism does not automatically prove malpractice.

Bleeding does not automatically prove malpractice.

But the reverse is equally important:

A known complication does not automatically prove that no malpractice occurred.

Turkish Court of Cassation jurisprudence makes this point particularly clear.

In Yargıtay 3rd Civil Chamber, E. 2021/5210, K. 2022/211, the original expert reports concluded that the bariatric patient’s death was likely caused by pulmonary embolism, a known obesity-surgery complication, and that there was no medical error.

The Court of Cassation nevertheless found that analysis inadequate.

It ordered a new multidisciplinary expert examination and specifically required consideration of:

the adequacy of preoperative investigations,

whether the patient could tolerate surgery,

whether the hospital had adequate facilities for obese patients,

and

whether deficiencies in hospital equipment affected treatment.

This is the correct legal approach to bariatric malpractice.

The court should not merely ask:

“Was the event listed as a complication?”

It should ask:

“Did the healthcare system do everything reasonably required before, during and after that complication occurred?”

A second critical issue is postoperative management.

A leak can initially be unavoidable.

But if the patient develops tachycardia, fever and severe abdominal symptoms and the healthcare team fails to investigate, the final sepsis may involve negligent complication management.

Similarly, pulmonary embolism may be an inherent postoperative risk, but the patient’s risk assessment and postoperative clinical course still require expert analysis.

A third issue is hospital organisation.

Bariatric patients can require rapid access to:

diagnostic imaging,

intensive care,

general surgery,

endoscopy,

and specialist consultation.

The Court of Cassation’s concern with hospital infrastructure in the 2022 obesity-surgery case is therefore especially relevant to international medical tourism.

The provider should not select a high-risk bariatric patient for surgery at a facility that is unable to manage foreseeable emergencies.

Informed consent creates another independent legal obligation.

Under Turkey’s Patient Rights Regulation, consent is not simply a signature at the bottom of a hospital document.

The relevant information must be given to the patient, and the consent process must comply with the applicable legal requirements.

For foreign patients, language is therefore particularly important.

A patient who speaks only English should not automatically be considered meaningfully informed because a Turkish consent form contains a signature.

The treatment provider should be able to show a real informed-consent process.

Permanent injury requires equally careful proof.

The 2023 Court of Cassation medical malpractice insurance case involving stomach-reduction surgery and eventual complete stomach removal demonstrates the importance of obtaining a legally adequate medical disability assessment before substantial permanent-disability compensation is calculated.

In fatal cases, the family should also insist on thorough expert analysis.

The Court of Cassation’s earlier criminal decision concerning death following stomach-reduction surgery demonstrates that conflicting forensic and administrative expert findings cannot simply be ignored; relevant contradictions must be investigated before reliable conclusions about medical responsibility are reached.

Foreign patients should therefore preserve evidence immediately.

Request:

the operative report,

anaesthesia records,

preoperative test results,

consent documents,

nursing records,

vital-sign charts,

laboratory results,

radiological records,

and discharge summary.

Preserve every WhatsApp and email communication.

If emergency treatment occurs after returning home, obtain the complete foreign hospital file.

If revision surgery is performed, preserve the operative report explaining what the second surgeon actually found.

These documents allow the chronology to be reconstructed.

The legal team can then ask the correct questions:

Was the patient suitable for surgery?

Was the hospital sufficiently equipped?

Was the operation technically correct?

Was the complication recognised in time?

Was emergency treatment appropriate?

Was discharge medically justified?

Was the patient adequately informed?

Did a delay cause additional damage?

Only after these questions are answered can a reliable conclusion be reached.

The international health-tourism rules also require careful treatment.

Turkey adopted a new International Health Tourism and Tourist Health Regulation on 26 April 2025, introducing a revised authorisation and regulatory system for international healthcare providers.

The regulation originally included compulsory complication insurance for qualifying international surgical procedures.

However, the Council of State subsequently stayed execution of that insurance requirement, and related litigation remained ongoing during 2026.

As a result, foreign bariatric patients should not rely on outdated statements that complication insurance is simply mandatory in every current case.

The regulatory position must be checked at the relevant date.

That development does not diminish the ordinary malpractice rights of patients.

A private bariatric patient may still pursue the appropriate consumer and compensation remedies where medical negligence is established.

A public hospital patient may have an administrative-law compensation route.

Foreign nationality does not itself remove either form of protection.

If you suffered a gastric leak, sepsis, pulmonary embolism, severe bleeding, organ loss, permanent disability or the death of a family member following sleeve gastrectomy, gastric bypass or another bariatric procedure in Turkey, the fact that the hospital calls the event a “known complication” should not end the investigation. Turkish malpractice law requires detailed examination of patient selection, preoperative testing, surgical care, hospital infrastructure, informed consent, postoperative monitoring, complication management and causation.

Legal Disclaimer

This article provides general legal information concerning bariatric surgery malpractice and the rights of international patients under Turkish law as of September 2026. It does not constitute individual legal or medical advice.

Bariatric surgery involves recognised medical risks, and the occurrence of a complication does not by itself prove malpractice.

Likewise, describing an event as a recognised complication does not automatically exclude liability where there may have been negligent patient selection, surgical treatment, hospital organisation, postoperative monitoring, complication management or informed consent.

Private hospitals, state hospitals, doctors and international health-tourism intermediaries can be subject to different legal and procedural rules.

The status of complication insurance under Turkey’s international health-tourism regulation also changed following Council of State stay-of-execution decisions and should be checked according to the date and circumstances of the individual treatment.

Every bariatric malpractice claim should therefore be evaluated on the basis of the complete Turkish and foreign medical record and appropriate specialist expert evidence.