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Gastric Bypass in Turkey (Roux-en-Y)

Clinical Lead

Meva Clinic Bariatric Care Team

Meva Clinic · Istanbul

Gastric Bypass in Turkey (Roux-en-Y)

  • from 3,500 €
  • ~4 nights in hospital
  • no deposit
  • English-speaking coordinator

A bariatric and metabolic surgery option for eligible patients with severe obesity, including some patients with type 2 diabetes, after a multidisciplinary medical assessment.

Meva Clinic Bariatric Care Team

Patient Care Information

Patient Care Information

"Our clinical approach prioritizes patient safety, individualized treatment planning, realistic expectations, and long-term follow-up throughout the international care journey."

About This Procedure

What is gastric bypass and how does it work?

A bariatric and metabolic surgery option for eligible patients with severe obesity, including some patients with type 2 diabetes, after a multidisciplinary medical assessment.

What is gastric bypass? Roux-en-Y gastric bypass is a bariatric and metabolic procedure that creates a small stomach pouch and reroutes part of the small intestine. This changes the path food takes and has both restrictive and metabolic effects. The procedure may be considered as part of a bariatric assessment, including when certain metabolic conditions or gastro-oesophageal reflux influence the choice of operation. Results and weight change differ from patient to patient, and no specific outcome can be promised.

Gastric bypass or gastric sleeve? Both are recognised bariatric procedures, but they work differently. To compare the options, patients can also read about the gastric sleeve (stomach reduction). Gastro-oesophageal reflux disease (GERD) is an important factor when choosing a bariatric procedure. In some patients with clinically significant reflux, gastric bypass may be considered as part of the bariatric plan. The decision is made individually after gastroenterological, surgical and multidisciplinary assessment.

Metabolic context and type 2 diabetes. Roux-en-Y gastric bypass has metabolic effects and, in clinical studies, is associated with improved blood-sugar control and, in some patients, remission of type 2 diabetes. The metabolic response varies with individual characteristics, how long the disease has been present, pancreatic function and adherence to the treatment and nutrition plan. Diabetes remission cannot be promised, and long-term metabolic monitoring remains necessary. Possible risks are assessed openly (PMID: 36280539).

Your clinical pathway with Meva Clinic. The coordinated gastric bypass pathway includes a multidisciplinary pre-operative assessment and, according to the confirmed individual plan, coordination of the hospital stay at the selected partner hospital, transfers, accommodation and support in your language. The operation and in-hospital medical care are provided by the responsible medical team. Nutrition and supplement recommendations are set individually. The included services and the cost estimate are set out in the written plan and reconfirmed before you travel. See also the bariatric and metabolic surgery options available for assessment.

Price. Gastric bypass has an estimated cost starting from €3,500. The final cost is confirmed individually, in writing, after a complete medical evaluation.

How much does a gastric bypass cost in Turkey compared with the UK?

At Meva Clinic, a Roux-en-Y gastric bypass costs from €3,500, with pre-operative tests, about 4 nights in hospital, transfers, an English-speaking coordinator and complication cover included. There is no deposit: you pay at the hospital, after admission and after you have spoken with the surgeon.

Meva Clinic, IstanbulUK private hospital
Starting price€3,500typically about £9,500–£15,000*
Pre-operative testsincludedoften extra*
Nights in hospitalabout 4typically 1–3*
Transfers and coordinatorincludedn/a
Complication cover6 months, includedvaries
Flightextran/a

*Typical published UK private prices, checked October 2026 (e.g. Ramsay Health Care UK); they vary by hospital.

On the NHS, weight-loss surgery is free, but waiting times are often long. A gastric bypass is a more complex operation than a gastric sleeve, so the surgeon's experience and the aftercare you receive matter more than the difference in price.

Common worries about gastric bypass, and what we do differently

  • “They shortened my intestine too much.” Doctors describe patients with chronic diarrhoea and deficiencies after overly aggressive bypass surgery. At Meva Clinic, the surgeon chooses the type of operation and the length of the bowel limbs based on your BMI, diabetes and reflux, in line with guidelines, and explains the plan to you before the operation.
  • “I had a bypass I didn't need.” The free assessment before you travel may recommend a gastric sleeve, a balloon or no surgery at all if a bypass is not necessary.
  • “They operated on me straight after I landed.” You arrive in the evening and rest overnight in hospital; the tests and the operation take place the next day.
  • “Nobody told me about vitamins.” After a bypass you need vitamins and blood tests for life. You receive your vitamins at discharge, a written plan and 1 year of remote medical follow-up.
  • “I had a complication at home and paid again.” The package includes complication cover of up to €5,000 for 6 months after surgery, including up to €1,500 for care in your home country, according to the policy terms.

Full guide: Is weight-loss surgery in Turkey safe? Risks, complications and warning signs.

How much weight will you lose after a gastric bypass?

The two large randomised clinical trials that compared gastric bypass with the gastric sleeve over 5 years show:

  • SM-BOSS (Switzerland, JAMA 2018): 68% of excess BMI lost after bypass, compared with 61% after gastric sleeve.
  • SLEEVEPASS (Finland, JAMA 2018): 57% of excess weight lost after bypass, compared with 49% after gastric sleeve.

Example: a person who is 1.70 m tall and weighs 130 kg carries about 58 kg of excess weight relative to a BMI of 25. Losing 57–68% of that excess means about 33–39 kg kept off in the long term. A bypass is preferred especially when there is significant reflux or type 2 diabetes, and the final choice is made by the surgeon after assessment.

Work out your starting point with our BMI calculator or compare with the gastric sleeve.

CA

Medically reviewed by

Op. Dr. Cuma A.

General Surgeon · Obesity & Metabolic Surgery

Graduate of Istanbul University–Cerrahpaşa Faculty of Medicine and specialist in general surgery. For more than 10 years his practice has focused on obesity and metabolic surgery — sleeve gastrectomy, gastric bypass, gastric botox and gastric balloon — with more than 10,000 bariatric procedures performed. Holds the Turkish Ministry of Health–approved obesity surgery certification.

10,000+ bariatric procedures · MoH-certified obesity surgery

Who is a candidate for a gastric bypass?

Your BMI is above 35 kg/m² and you want to find out whether bariatric surgery is right for your situation.

Your BMI is between 30 and 34.9 kg/m², you have a metabolic condition, and non-surgical methods have not given you lasting results.

You have type 2 diabetes, gastro-oesophageal reflux or other obesity-related conditions that call for a specialist medical assessment.

You understand that eligibility and the choice of procedure are decided individually, after assessment by the medical team.

What the gastric bypass package in Turkey includes

Free assessment by the surgeon before you travel (WhatsApp video call or email)

Pre-operative tests and investigations at the hospital

Laparoscopic surgery under general anaesthesia, performed by Op. Dr. Cuma A.

About 4 nights in hospital, with round-the-clock nursing and 3 meals a day

VIP transfer from the airport (IST or SAW) to the hospital and back

English-speaking patient coordinator with you at the hospital

One companion can stay free of charge in your hospital room, meals included

Discharge medication, vitamins, compression stockings and a post-operative check-up

Complication cover for 6 months after surgery, according to the policy terms

Remote medical follow-up for 1 year (WhatsApp, Zoom or email)

Flights are not included. Optional: partner hotel with Bosphorus views, on request (charged separately)

How gastric bypass surgery works, step by step

Creation of a small gastric pouch and intestinal rerouting.

1

Pre-operative assessment

Depending on your history and risk profile, tests may include blood work, cardiology checks, imaging, a digestive assessment and specialist consultations. The surgical team confirms suitability before surgery is scheduled.

2

General anaesthesia and monitoring

The operation is performed under general anaesthesia, with monitoring led by the anaesthesia and surgical team at the partner hospital named in your confirmed care plan.

3

Creating the small stomach pouch

Through small laparoscopic (keyhole) incisions, the surgeon divides the stomach to create a small pouch, sized to your anatomy and individual plan.

4

Rerouting the small intestine (Roux-en-Y)

A section of the small intestine is connected to the new pouch, so food bypasses most of the stomach and the first part of the small intestine.

5

Intra-operative safety checks

The team checks for bleeding and tests the new connections for leaks, following the protocols that apply to your case.

6

Monitoring on the ward

After surgery you are monitored in hospital; walking, hydration and the first clear liquids are introduced step by step, according to how you recover.

Gastric bypass recovery, day by day

1

Phase 1: Hospital Stay (4 nights)

You stay at the partner hospital for monitoring, assisted walking and clear liquids. Discharge happens only once the medical team confirms you are ready; you fly home once the surgeon clears you.

2

Phase 2: After Discharge (optional hotel on request, separate cost)

Short walks, sip-by-sip hydration, full liquids as prescribed and your medication. A check-up before the flight home confirms you are fit to travel.

3

Phase 3: Weeks 2–8 at Home

Your diet moves step by step from liquids to purée, then soft foods and finally regular textures, usually over about 4–8 weeks. Desk work often resumes after around 14 days, if your recovery allows.

4

Phase 4: First Year and Beyond

Lifelong vitamin and mineral supplements and regular blood tests are part of life after a bypass. Online nutrition and follow-up support continues for 12 months, according to your confirmed care plan.

The Meva Advantage

A coordinated pathway for patients travelling from abroad: individual assessment, planning with the partner hospital suited to the case, transfers and accommodation according to the confirmed plan, and remote post-operative guidance.

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Clinical Standards & Safety

Gastric bypass risks and how they are managed

Hospital-based procedures are coordinated through accredited partner hospitals, including JCI-accredited institutions where clinically appropriate. Below are the clinical guidelines, safety protocols, and medical reference documentation for this procedure.

Indicated / Suitable For

  • Eligibility is assessed individually using Body Mass Index (BMI), obesity-related conditions, metabolic health, previous treatment history, and a multidisciplinary review.
  • Current international guidelines generally support metabolic and bariatric surgery for appropriately selected patients with a BMI above 35, and consideration for lower BMI ranges when metabolic disease is present.
  • Presence of severe acid reflux (GERD) or metabolic syndrome may influence whether a gastric bypass or a sleeve gastrectomy is considered more appropriate after specialist assessment.
  • Candidates who have not achieved sustained weight reduction through structured lifestyle, diet, and non-surgical management options.
  • International patients seeking hospital-based surgical planning, pre-operative clearances, and long-term follow-up planning.

Contraindications / Not Suitable

  • Untreated severe psychiatric conditions, active substance abuse, or eating disorders that limit compliance with mandatory post-operative guidelines.
  • Severe portal hypertension with gastric varices, active uncorrected bleeding disorders, or advanced cardiopulmonary disease precluding general anesthesia.
  • Active gastrointestinal ulcers, severe inflammatory bowel disease (Crohn's disease involving the small intestine), or structural anomalies of the digestive tract.
  • Pregnancy, or plans to become pregnant within 12 to 18 months following the surgical procedure due to nutritional and rapid weight loss risks.
  • Inability or unwillingness to commit to lifelong daily vitamin/mineral supplementation and structured follow-up planning.

Pre-Operative Evaluation & Diagnostic Checks

1

Bariatric Consultations: Multi-disciplinary evaluation including detailed medical history and metabolic status analysis by the bariatric team.

2

Pre-Operative Laboratory Panels: Extensive blood work including complete blood count, metabolic chemistry, liver/kidney functions, thyroid profiles, HbA1c, and baseline nutrient levels.

3

Cardiovascular & Pulmonary Clearance: Electrocardiogram (ECG), chest X-ray, and pulmonary function tests to evaluate fitness for general anesthesia.

4

Gastrointestinal Assessment: Upper endoscopy (EGD) where indicated to screen for H. pylori infection, hiatal hernias, and assess the stomach lining before surgery.

5

Nutritional Counseling: Guidance to prepare patients for the progressive dietary phases post-surgery.

Potential Risks & Complications

In compliance with transparent clinical reporting, Meva Clinic ensures patients are fully informed of the physiological risks associated with surgical procedures through accredited partner-hospital safety protocols where clinically appropriate.

Anastomotic Leak

Gastric or intestinal fluid leakage at the surgical connections; mitigated by intraoperative leak testing and managed surgically or endoscopically.

Dumping Syndrome

Rapid transit of food (especially sugar/carbohydrates) into the small intestine, causing nausea, dizziness, sweating, or abdominal cramps.

Marginal Ulcers

Ulceration at the gastrojejunal connection; managed with proton pump inhibitors (PPIs) and avoidance of smoking and NSAIDs.

Nutritional Deficiencies

Reduced absorption of iron, calcium, folate, and vitamins (B12, D); managed through structured daily supplementation.

Intestinal Obstruction or Herniation

Internal hernias or adhesions causing small bowel obstruction, potentially requiring surgical revision.

Thromboembolic Events

Deep vein thrombosis (DVT) or pulmonary embolism; mitigated by early mobilization, compression devices, and anticoagulant therapy.

Realistic Expectations & Outcomes

Published outcomes vary by patient, procedure type, follow-up adherence, and metabolic profile. Some studies associate Roux-en-Y gastric bypass with substantial weight-loss and potential improvement in obesity-related metabolic conditions, but no specific weight-loss amount, diabetes outcome, or clinical result can be promised.

Revision & Follow-Up Policy

In cases of long-term weight regain, severe nutritional complications, or anatomical issues (such as anastomotic stenosis or persistent ulcers), a comprehensive diagnostic workup including imaging and endoscopy is conducted. Revisional options may be evaluated following a multi-disciplinary review by the bariatric board. For 12 months after your treatment you can also send photos to the medical team whenever you wish and receive their feedback, and your questions are answered remotely.

Authoritative Medical References & Studies

  • [1]
    American Society for Metabolic and Bariatric Surgery (ASMBS) and International Federation for the Surgery of Obesity and Metabolic Disorders (IFSO): Indications for Metabolic and Bariatric Surgery (2022). (PMID: 36280539)View Study
  • [2]
    Peterli R, et al. Effect of Laparoscopic Sleeve Gastrectomy vs Laparoscopic Roux-en-Y Gastric Bypass on Weight Loss in Patients With Morbid Obesity: The SM-BOSS Randomized Clinical Trial. JAMA. 2018;319(3):255-265.View Study
  • [3]
    Salminen P, et al. Effect of Laparoscopic Sleeve Gastrectomy vs Laparoscopic Roux-en-Y Gastric Bypass on Weight Loss at 5 Years Among Patients With Morbid Obesity: The SLEEVEPASS Randomized Clinical Trial. JAMA. 2018;319(3):241-254.View Study

Medical Disclaimer: The clinical information provided on this page is for educational and general information purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Final suitability and treatment pathways are determined exclusively after in-person consultations, medical assessments, physical tests, and diagnostic checks in Istanbul.

Gastric bypass in Turkey: frequently asked questions

Eligibility is determined by a multidisciplinary medical assessment. According to the 2022 ASMBS/IFSO guidelines, bariatric surgery may be recommended for people with a BMI above 35 kg/m², regardless of whether related conditions are present, and may be considered for some people with a BMI between 30 and 34.9 kg/m², depending on their metabolic profile and the results of non-surgical treatment.
A gastric sleeve reduces stomach volume and brings hormonal changes related to appetite and fullness. Gastric bypass combines a smaller stomach capacity with a partial rerouting of the intestine. No procedure suits every patient; the choice is made after an individual assessment.
The length of the hospital stay is set individually by the medical team, depending on the procedure and how recovery progresses. The figures shown on this page are indicative and are confirmed in the medical plan.
Fitness for the return flight is assessed individually by the medical team after the post-operative examination, based on clinical stability, mobility, digestive tolerance and the risk of thromboembolism.
Nutritional recovery follows a staged progression, from liquids to puréed foods, then soft foods and later solids. The exact pace and recommendations are set by the medical team and nutrition specialists.
Gastric bypass can reduce the absorption of some nutrients. Vitamin and mineral supplements and regular blood tests are needed long term; the products and doses are set individually by the medical team.
The anatomical, hormonal and metabolic changes brought by bypass can help improve blood-sugar control in some patients. Individual results vary, and diabetes treatment should not be changed without the advice of your own doctor.
Risks can include reactions to anaesthesia, bleeding, infection, leakage at the anastomosis (the join between stomach and intestine), thromboembolism, marginal ulcer, dumping syndrome or nutritional deficiencies. Risk is reduced through individual assessment, safety measures and medical monitoring.
The plan and initial estimate are prepared after your medical documents have been reviewed. The included services and estimated costs are set out in writing before you travel and reconfirmed after the pre-operative assessment. Any additional medical service that may be needed depends on the individual clinical situation.
At Meva Clinic, gastric bypass starts from €3,500. According to your confirmed care plan, this covers the laparoscopic operation under general anaesthesia, 4 nights at the partner hospital with 24/7 nursing, private transfers, a dedicated coordinator and 12 months of online nutrition follow-up. Flights are not included; optional: a Bosphorus-view partner hotel can be arranged on request (separate cost). The final price depends on your tests and medical needs and is confirmed in writing; no deposit is required, and you pay at the hospital after your consultation. The package also includes 6-month complication insurance.
Death after gastric bypass is uncommon, but early risks are somewhat higher than after a sleeve. In published registry data on more than 611,000 patients, mortality within 30 days was 0.15% after gastric bypass versus 0.07% after sleeve gastrectomy, and readmission was 5.9% versus 3%. Age, BMI, heart and lung disease and smoking all affect your personal risk, so the anaesthesia and surgical team assess them before confirming that bypass is the right operation for you.
No single surgeon is best for everyone, so judge the facts: how many bariatric and bypass operations the surgeon performs, whether the hospital is accredited and equipped for complications, whether you receive a written plan covering tests, stay and price, and how follow-up works after you fly home. At Meva Clinic, bariatric operations are performed by Op. Dr. Cuma A., a partner surgeon with more than 10 years in bariatric surgery and over 10,000 procedures.
In a published study that followed 418 bypass patients for 12 years, average weight loss was 35% of starting body weight at 2 years and 26.9% at 12 years: some weight returned, but most of the loss lasted. Among patients who had type 2 diabetes, 51% were still in remission at 12 years. Individual results vary widely and depend on diet, activity, supplements and follow-up, so no specific outcome can be promised.
Often, yes. In a published randomised trial comparing both operations over 5 years, reflux resolved in 60.4% of bypass patients versus 25.0% after a sleeve, and worsened in 6.3% versus 31.8%. Weight loss was similar, with 68.3% versus 61.1% excess BMI loss, a difference that was not statistically significant. Bypass does, however, require lifelong supplements and has its own risks, so the choice is made with the surgeon after an endoscopy.
Pre-operative tests usually include a full blood count, metabolic panel, liver and kidney function, thyroid tests, HbA1c and baseline vitamin and iron levels, plus an ECG, a chest X-ray and lung function tests where needed. An upper endoscopy is often requested to check for H. pylori, ulcers or a hiatal hernia before part of the stomach is bypassed. You can send recent results from home; any missing tests are completed in Istanbul before surgery.
For some people, GLP-1 injections are a reasonable first step, and they are also used under medical supervision for weight regain after surgery. They need a prescription and regular follow-up from your own doctor, weight often returns when they are stopped, and they are not suitable for everyone. A bypass is a one-time operation with lasting anatomical and metabolic effects, but it carries surgical risks. The free online assessment can help you compare both paths.
Yes, many women have healthy pregnancies after a bypass, but doctors advise waiting 12 to 18 months, until your weight has stabilised and nutrient levels are safe. Fertility can improve quickly as weight falls, so reliable contraception matters; because absorption changes after a bypass, the contraceptive pill may be less reliable, and your gynaecologist may suggest another method. During pregnancy, supplements and blood tests are adjusted together with your obstetric team.
You eat small portions several times a day, with protein at every meal, and take vitamins and minerals for life. Concentrated sweets can trigger dumping syndrome (dizziness, sweating, palpitations), so they are avoided. Most patients return to work after 2–3 weeks and to exercise after 4–6 weeks, as advised by their doctor.
It is a reaction that happens when sugary or fatty food passes into the intestine too quickly: dizziness, sweating, palpitations, cramps or diarrhoea shortly after a meal. It is prevented by eating small meals, avoiding concentrated sugar and not drinking during meals. You receive these rules in your written nutrition plan.
It is recommended that you avoid alcohol for at least the first year. After a bypass, alcohol is absorbed faster and blood alcohol levels rise higher, and the risk of problem drinking is greater. Talk to your doctor before reintroducing it.
As a rule, no. Non-steroidal anti-inflammatory drugs can cause an ulcer at the join between the stomach and the intestine. Paracetamol is usually used for pain. Tell any doctor that you have had a gastric bypass before you start a new treatment.
The procedure described on this page is the Roux-en-Y bypass, the most studied form of bypass. There are other variants, such as the mini bypass (with a single anastomosis). The choice depends on your BMI, reflux, diabetes and previous operations, and is made by the surgeon after assessment.
Yes, converting a gastric sleeve to a bypass is a common revision operation, especially for severe reflux or weight regain. It is more complex than a first operation and requires an endoscopy and careful assessment. The details are on our bariatric revision surgery page.
The NHS does not fund surgery that you arrange privately abroad, and UK private insurers usually do not cover planned weight-loss surgery abroad, so check your policy. At Meva Clinic, the price from €3,500 includes tests, about 4 nights in hospital, transfers, the coordinator and complication cover.
Yes. An English-speaking patient coordinator is with you at the hospital, during your talk with the surgeon and at discharge, and answers you on WhatsApp before and after the operation.
Yes. One companion can stay free of charge in your hospital room, meals included. The companion's flight is not included.

Procedure Details

Hospital Stay

4 Nights

Hotel Package

Optional, on request

Return to Work

14 Days

Anaesthesia

General

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Medical Disclaimer: The clinical information on this website is for educational and informational purposes only. It does not constitute medical advice, diagnosis, or treatment. Always consult with a qualified physician or healthcare provider regarding any medical condition or surgical procedure in Turkey.

Airport transfers are included in the confirmed package; partner-hotel stays are optional, on request (separate cost).

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