Bariatric specialists: methods and listed affiliations · Decision guide
Bariatric specialists: methods and listed affiliations
Compare 37 listed specialists. Each row explains its research or provider evidence; confirm current practice and the named operator.
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The directory includes specialists with research identity evidence or their own public package; authorship alone does not confirm operating experience.
Directories by method
- Sleeve gastrectomy · surgeons · clinics
- Gastric bypass: Roux-en-Y and one-anastomosis · surgeons · clinics
- Adjustable gastric banding · surgeons · clinics
- Gastric balloon and endoscopic sleeve gastroplasty · surgeons · clinics
- Robotic bariatric surgery · surgeons · clinics
- Revisional bariatric surgery · surgeons · clinics
Surgeons
| Specialist | Listed affiliation (confirm current practice) | Country | Published method links (research or provider source) | Public package price | Consultation |
|---|---|---|---|---|---|
| Mohamed HanyResearch authorship; personal operating experience requires confirmationPublished identity source | Alexandria University, Alexandria, Egypt. | Egypt | Gastric balloon, Gastric banding, Mini / one-anastomosis gastric bypass, Roux-en-Y gastric bypass, Endoscopic sleeve gastroplasty, Revisional bariatric surgery, Robotic Roux-en-Y gastric bypass, Sleeve gastrectomy | Request a current quote | Read this specialist’s research |
| Tom MalaResearch authorship; personal operating experience requires confirmationPublished identity source | Oslo University Hospital, Oslo, Norway. | Norway | Mini / one-anastomosis gastric bypass, Roux-en-Y gastric bypass, Revisional bariatric surgery, Sleeve gastrectomy | Request a current quote | Read this specialist’s research |
| Torsten OlbersResearch authorship; personal operating experience requires confirmationPublished identity source | Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden. | Sweden | Mini / one-anastomosis gastric bypass, Roux-en-Y gastric bypass, Revisional bariatric surgery, Sleeve gastrectomy | Request a current quote | Read this specialist’s research |
| Omar M GhanemResearch authorship; personal operating experience requires confirmationPublished identity source | Department of Surgery, Mayo Clinic, Rochester, MN. | United States | Gastric banding, Mini / one-anastomosis gastric bypass, Roux-en-Y gastric bypass, Endoscopic sleeve gastroplasty, Revisional bariatric surgery, Sleeve gastrectomy | Request a current quote | Read this specialist’s research |
| Piotr MajorResearch authorship; personal operating experience requires confirmationPublished identity source | Jagiellonian University, Krakow, Poland. | Poland | Gastric balloon, Gastric banding, Mini / one-anastomosis gastric bypass, Roux-en-Y gastric bypass, Endoscopic sleeve gastroplasty, Revisional bariatric surgery, Sleeve gastrectomy | Request a current quote | Read this specialist’s research |
| Mohammad KermansaraviResearch authorship; personal operating experience requires confirmationPublished identity source | Iran University of Medical Sciences, Teheran, Islamic Republic of Iran. | Iran | Gastric balloon, Gastric banding, Mini / one-anastomosis gastric bypass, Roux-en-Y gastric bypass, Endoscopic sleeve gastroplasty, Revisional bariatric surgery, Sleeve gastrectomy | Request a current quote | Read this specialist’s research |
| Ali AminianResearch authorship; personal operating experience requires confirmationPublished identity source | Bariatric and Metabolic Institute, Department of General Surgery, Cleveland Clinic, Cleveland, Ohio (A.A.). | United States | Gastric banding, Roux-en-Y gastric bypass, Revisional bariatric surgery, Robotic Roux-en-Y gastric bypass, Sleeve gastrectomy | Request a current quote | Read this specialist’s research |
| Benjamin ClappResearch authorship; personal operating experience requires confirmationPublished identity source | Department of Surgery, Texas Tech School of Medicine, El Paso, Texas. | United States | Gastric banding, Mini / one-anastomosis gastric bypass, Roux-en-Y gastric bypass, Revisional bariatric surgery, Robotic Roux-en-Y gastric bypass, Robotic sleeve gastrectomy, Sleeve gastrectomy | Request a current quote | Read this specialist’s research |
| Enrique F ElliResearch authorship; personal operating experience requires confirmationPublished identity source | Division of Advanced Gastrointestinal and Bariatric Surgery, Department of General Surgery, Mayo Clinic, Jacksonville, Florida. Electronic address: | United States | Gastric balloon, Gastric banding, Mini / one-anastomosis gastric bypass, Roux-en-Y gastric bypass, Endoscopic sleeve gastroplasty, Revisional bariatric surgery, Robotic Roux-en-Y gastric bypass, Robotic sleeve gastrectomy, Sleeve gastrectomy | Request a current quote | Read this specialist’s research |
| Mario MusellaResearch authorship; personal operating experience requires confirmationPublished identity source | Advanced Biomedical Sciences Department, Federico II” University, Naples, Italy. | Italy | Gastric balloon, Gastric banding, Mini / one-anastomosis gastric bypass, Roux-en-Y gastric bypass, Endoscopic sleeve gastroplasty, Revisional bariatric surgery, Robotic mini gastric bypass, Robotic Roux-en-Y gastric bypass, Sleeve gastrectomy | Request a current quote | Read this specialist’s research |
 Gerhard Prager[11]Research authorship; personal operating experience requires confirmation
Published practice informationAccording to the linked practice source. Confirm current practice and the operating hospital for your particular offer; a package listing may name a different institution. Dr. Gerhard Prager is a gastric surgeon in Austria who has performed over 3,000 obesity operations. He heads the Obesity Outpatient Clinic at Vienna General Hospital. Dr. Prager also leads the Metabolic Surgery Center at Confraternitaet Private Hospital. He specializes in gastric bypass, sleeve gastrectomy, and gastric banding. Reported experience — not an audited surgical recordAccording to the published provider biography. This is an unaudited, undated claim; it does not establish a procedure-specific personal outcome rate. unaudited Bookimed biography; undated count Dr. Gerhard Prager is a gastric surgeon in Austria who has performed over 3,000 obesity operations. |
 Vienna General Hospital (AKH) |
Austria | Gastric balloon, Gastric banding, Mini / one-anastomosis gastric bypass, Roux-en-Y gastric bypass, Endoscopic sleeve gastroplasty, Revisional bariatric surgery, Sleeve gastrectomy | Request a current quote | Ask about this specialist |
 Halil Alis[13]Research authorship; personal operating experience requires confirmation
Published practice informationAccording to the linked practice source. Confirm current practice and the operating hospital for your particular offer; a package listing may name a different institution. Halil Alış Liv Hospital Topkapı General Surgery practice Areas of Interests Laparoscopic surgery Robotic surgery Obesity surgery operations on named doctor page He treats obesity through techniques like gastric bypass and sleeve gastrectomy. university identity link 2017- Professor of General Surgery – Istanbul Aydın University Health Application and Research Center Reported experience — not an audited surgical recordAccording to the published provider biography. This is an unaudited, undated claim; it does not establish a procedure-specific personal outcome rate. unaudited Bookimed page claim; not a personal operation count 34 years of experience |
 Valued Med Hub Hospitals |
Turkey | Sleeve gastrectomy | Request a current quote | Ask about this specialist |
 Samet Yardimci[19]Research authorship; personal operating experience requires confirmation |
 Professor Dr. Samet Yardımcı Clinic |
Turkey | Roux-en-Y gastric bypass, Sleeve gastrectomy | View packageUSD 5000 Price source · Recorded 2026-10-21 (collection date; validity not supplied) View packageUSD 6000 Price source · Recorded 2026-10-21 (collection date; validity not supplied) View packageUSD 4000 Price source · Recorded 2026-10-21 (collection date; validity not supplied) View packageUSD 5000 Price source · Recorded 2026-10-21 (collection date; validity not supplied) |
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| Wendy A BrownResearch authorship; personal operating experience requires confirmationPublished identity source | Bariatric Surgery Registry, Department of Surgery, The School of Translational Medicine, Monash University, Melbourne, Victoria, Australia. | Australia | Gastric banding, Mini / one-anastomosis gastric bypass, Roux-en-Y gastric bypass, Endoscopic sleeve gastroplasty, Revisional bariatric surgery, Sleeve gastrectomy | Request a current quote | Read this specialist’s research |
| Everton CazzoResearch authorship; personal operating experience requires confirmationPublished identity source | State University of Campinas, Campinas, Brazil. | Brazil | Gastric banding, Mini / one-anastomosis gastric bypass, Roux-en-Y gastric bypass | Request a current quote | Read this specialist’s research |
| Jaime Ruiz-TovarResearch authorship; personal operating experience requires confirmationPublished identity source | Health Sciences Department, San Juan de Dios School of Nursing and Physical Therapy, Comillas Pontifical University, 28036 Madrid, Spain. | Spain | Gastric banding, Mini / one-anastomosis gastric bypass, Roux-en-Y gastric bypass, Endoscopic sleeve gastroplasty, Sleeve gastrectomy | Request a current quote | Read this specialist’s research |
| Adam Abu-AbeidResearch authorship; personal operating experience requires confirmationPublished identity source | Division of General Surgery, Tel Aviv Sourasky Medical Center, Tel-Aviv, Israel | Israel | Gastric banding, Mini / one-anastomosis gastric bypass, Roux-en-Y gastric bypass, Endoscopic sleeve gastroplasty, Revisional bariatric surgery, Sleeve gastrectomy | Request a current quote | Read this specialist’s research |
| Gianfranco SilecchiaResearch authorship; personal operating experience requires confirmationPublished identity source | Department of Medical and Surgical Sciences and Translational Medicine, Faculty of Medicine and Psychology, St. Andrea Hospital, Sapienza University of Rome, Rome, Italy. | Italy | Gastric balloon, Gastric banding, Mini / one-anastomosis gastric bypass, Roux-en-Y gastric bypass, Endoscopic sleeve gastroplasty, Revisional bariatric surgery, Sleeve gastrectomy | Request a current quote | Read this specialist’s research |
| Stefano OlmiResearch authorship; personal operating experience requires confirmationPublished identity source | Policlinico San Marco, Gruppo San Donato, Zingonia, Italy. | Italy | Gastric banding, Mini / one-anastomosis gastric bypass, Roux-en-Y gastric bypass, Endoscopic sleeve gastroplasty, Revisional bariatric surgery, Sleeve gastrectomy | Request a current quote | Read this specialist’s research |
| Pichamol JirapinyoResearch authorship; personal operating experience requires confirmationPublished identity source | Division of Gastroenterology, Hepatology and Endoscopy Brigham and Women’s Hospital, Boston, MA. | United States | Gastric balloon, Roux-en-Y gastric bypass, Endoscopic sleeve gastroplasty, Revisional bariatric surgery, Sleeve gastrectomy | Request a current quote | Read this specialist’s research |
 Abdulcabbar Kartal[76]Named public package or published practice profile |
 Anadolu Medical Center |
Turkey | Provider packages: Bypass, Robot-assisted surgery, Sleeve | View packageUSD 10835 Price source · Recorded 2026-10-21 (collection date; validity not supplied) View packageUSD 11379 Price source · Recorded 2026-10-21 (collection date; validity not supplied) View packageUSD 6406 Price source · Recorded 2026-10-21 (collection date; validity not supplied) View packageUSD 7167 Price source · Recorded 2026-10-21 (collection date; validity not supplied) |
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 Carlos Ballesta Lopez[90]Named public package or published practice profile |
 Centro Médico Teknon |
Spain | Provider packages: Band, Bypass, Sleeve | View packageUSD 17983 Price source · Recorded 2026-10-21 (collection date; validity not supplied) View packageUSD 26749 Price source · Recorded 2026-10-21 (collection date; validity not supplied) View packageUSD 16859 Price source · Recorded 2026-10-21 (collection date; validity not supplied) |
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 Kaplan Baha Temizgonul[188]Named public package or published practice profile |
 Dr.Kaplan Baha Temizgonul |
Turkey | Provider packages: Bypass, Sleeve | View packageUSD 5800 Price source · Recorded 2026-10-21 (collection date; validity not supplied) View packageUSD 4944 Price source · Recorded 2026-10-21 (collection date; validity not supplied) View packageUSD 5394 Price source · Recorded 2026-10-21 (collection date; validity not supplied) |
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 Burcin Batman[191]Named public package or published practice profile |
 Hisar Hospital Intercontinental |
Turkey | Sleeve gastrectomy | View packageUSD 3893 Price source · Recorded 2026-10-21 (collection date; validity not supplied) | Ask about this specialist |
 Adnan Bulut[194]Named public package or published practice profile |
 Lokman Hekim Akay Hospital |
Turkey | Provider packages: Sleeve | View packageUSD 3294 Price source · Recorded 2026-10-21 (collection date; validity not supplied) | Ask about this specialist |
 Abdelkhalek[221]Named public package or published practice profile |
 Dr. Islam Abdelkhalek’s Clinic |
Egypt | Provider packages: Bypass, Sleeve | View packageUSD 4500 Price source · Recorded 2026-10-21 (collection date; validity not supplied) View packageUSD 3500 Price source · Recorded 2026-10-21 (collection date; validity not supplied) |
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 Farid Rafiyev[225]Named public package or published practice profile |
 Liv Bona Dea Hospital Baku |
Azerbaijan | Provider packages: Sleeve | View packageUSD 3500 Price source · Recorded 2026-10-21 (collection date; validity not supplied) View packageUSD 4000 Price source · Recorded 2026-10-21 (collection date; validity not supplied) |
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 Hanifi Onalan[297]Named public package or published practice profile |
 Atlas University Hospital |
Turkey | Provider packages: Sleeve | View packageUSD 3300 Price source · Recorded 2026-10-21 (collection date; validity not supplied) | Ask about this specialist |
 Catalin Copaescu[314]Named public package or published practice profile |
 Ponderas Academic Hospital |
Romania | Provider packages: Bypass, Sleeve | View packageUSD 12924 Price source · Recorded 2026-10-21 (collection date; validity not supplied) View packageUSD 9575 Price source · Recorded 2026-10-21 (collection date; validity not supplied) |
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 Simona Filip [317]Named public package or published practice profile |
Ponderas Academic Hospital |
Romania | Provider packages: Sleeve | View packageUSD 8428 Price source · Recorded 2026-10-21 (collection date; validity not supplied) | Ask about this specialist |
 Ionut Hutopila[320]Named public package or published practice profile |
Ponderas Academic Hospital |
Romania | Sleeve gastrectomy | View packageUSD 12363 Price source · Recorded 2026-10-21 (collection date; validity not supplied) | Ask about this specialist |
 Mehmet Guler[323]Named public package or published practice profile |
 Medical Park Antalya Hospital Complex |
Turkey | Provider packages: Sleeve | View packageUSD 3800 Price source · Recorded 2026-10-21 (collection date; validity not supplied) | Ask about this specialist |
 Omer Bilgehan Poyrazoglu [344]Named public package or published practice profile |
 Büyük Anadolu Hospitals (BAH International) |
Turkey | Provider packages: Sleeve | View packageUSD 3500 Price source · Recorded 2026-10-21 (collection date; validity not supplied) | Ask about this specialist |
 Carlos Garcia Vasquez[377]Named public package or published practice profile |
 Digestive Surgery and Gastroenterology Specialist Centro PAD |
Spain | Provider packages: Bypass, Sleeve | View packageUSD 14610 Price source · Recorded 2026-10-21 (collection date; validity not supplied) View packageUSD 10114 Price source · Recorded 2026-10-21 (collection date; validity not supplied) |
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 Salih Yilmaz[399]Named public package or published practice profile |
 Turan Turan Health Group |
Turkey | Provider packages: Bypass, Sleeve | View packageUSD 6300 Price source · Recorded 2026-10-21 (collection date; validity not supplied) View packageUSD 4950 Price source · Recorded 2026-10-21 (collection date; validity not supplied) |
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 Mehmet Kaya[419]Named public package or published practice profile |
 Estexper Clinic |
Turkey | Provider packages: Sleeve | View packageUSD 3929 Price source · Recorded 2026-10-21 (collection date; validity not supplied) | Ask about this specialist |
 Kivanc Derya PekerPublished profile sourceNamed public package or published practice profile |
Hisar Hospital Intercontinental |
Turkey | Published service listing: sleeve gastrectomy; confirm the proposed operation | Request a current quote | Ask about this specialist |
Sources (38)
- Gerhard Prager
- Halil Alis
- Samet Yardimci
- Abdulcabbar Kartal
- Carlos Ballesta Lopez
- Kaplan Baha Temizgonul
- Burcin Batman
- Adnan Bulut
- Abdelkhalek
- Farid Rafiyev
- Hanifi Onalan
- Catalin Copaescu
- Simona Filip
- Ionut Hutopila
- Mehmet Guler
- Omer Bilgehan Poyrazoglu
- Carlos Garcia Vasquez
- Salih Yilmaz
- Mehmet Kaya
- us-uk.bookimed.com — source
- Ring-Augmented Versus Non-Ring Augmented Sleeve Gastrectomy in Patients with BMI > 50 kg/m²: 3-Year Follow-up of a Randomized Controlled Trial.
- Effect of standard versus long alimentary limb distal Roux-en-Y gastric bypass on weight loss and nutritional outcomes at 10 years in patients with BMI 50-60 kg/m2-a secondary analysis of a randomized clinical trial.
- Metabolic and bariatric surgery versus intensive non-surgical treatment for adolescents with severe obesity (AMOS2): a multicentre, randomised, controlled trial in Sweden.
- Beyond initial weight loss: procedure-specific predictors of weight recurrence after metabolic and bariatric surgery.
- Metabolic heterogeneity after laparoscopic sleeve gastrectomy in type 2 diabetes mellitus patients with severe obesity: insights from continuous glucose monitoring, glycemic profiles and quality of life.
- A Comparative Analysis of Postoperative Complications and Five-Year Metabolic Outcomes Following Metabolic and Bariatric Surgery in Patients with BMI 50-60 kg/m2 and BMI > 60 kg/m2.
- Anastomotic marginal ulceration after conversion of sleeve gastrectomy to Roux-en-Y gastric bypass.
- Truncal Vagotomy and Gastrojejunostomy Revision for Treatment of Marginal Ulcer.
- Sleeve Gastrectomy to Roux-en-Y Gastric Bypass Conversion Versus Primary Roux-en-Y Gastric Bypass: Impact of Robotic Platform on Propensity-Matched Outcomes.
- Robotic versus laparoscopic one anastomosis gastric bypass (OAGB): a propensity score-matched comparative study of perioperative outcomes in 200 patients.
- www.livhospital.com — source
- Is All Weight Loss Equal Following Sleeve Gastrectomy? Defining Body Composition and Anthropometric Thresholds for Hyperglycemia Remission in Women from a Prospective Cohort Study.
- Short-Term Evolution of MASLD Following Roux-en-Y Gastric Bypass: A Focus on Fibrotic MASH.
- Changes in the Bone Mineral Density after Sleeve Gastrectomy vs. Roux-En-Y Gastric Bypass 2 Years after Surgery.
- Management of Recurrent Weight Gain After Sleeve Gastrectomy: Comparative Effectiveness of Conversion Procedures Versus Obesity Management Medications.
- Long-Term Anatomical Durability and Clinical Outcomes of Concomitant Laparoscopic Sleeve Gastrectomy and Hiatal Hernia Repair: Up to 10-Year Multicenter Analysis.
- Laparoscopic Revision of Sleeve Gastrectomy with Only Hiatal Hernia Repair for Gastroesophageal Reflux Disease: A Retrospective Study.
- Impact of Endoscopic Bariatric and Metabolic Therapies on Chronic Kidney Disease in Patients with Impaired Glycemic Control.
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References and further reading
Sources (38)
- Gerhard Prager
- Halil Alis
- Samet Yardimci
- Abdulcabbar Kartal
- Carlos Ballesta Lopez
- Kaplan Baha Temizgonul
- Burcin Batman
- Adnan Bulut
- Abdelkhalek
- Farid Rafiyev
- Hanifi Onalan
- Catalin Copaescu
- Simona Filip
- Ionut Hutopila
- Mehmet Guler
- Omer Bilgehan Poyrazoglu
- Carlos Garcia Vasquez
- Salih Yilmaz
- Mehmet Kaya
- us-uk.bookimed.com — source
- Ring-Augmented Versus Non-Ring Augmented Sleeve Gastrectomy in Patients with BMI > 50 kg/m²: 3-Year Follow-up of a Randomized Controlled Trial.
- Effect of standard versus long alimentary limb distal Roux-en-Y gastric bypass on weight loss and nutritional outcomes at 10 years in patients with BMI 50-60 kg/m2-a secondary analysis of a randomized clinical trial.
- Metabolic and bariatric surgery versus intensive non-surgical treatment for adolescents with severe obesity (AMOS2): a multicentre, randomised, controlled trial in Sweden.
- Beyond initial weight loss: procedure-specific predictors of weight recurrence after metabolic and bariatric surgery.
- Metabolic heterogeneity after laparoscopic sleeve gastrectomy in type 2 diabetes mellitus patients with severe obesity: insights from continuous glucose monitoring, glycemic profiles and quality of life.
- A Comparative Analysis of Postoperative Complications and Five-Year Metabolic Outcomes Following Metabolic and Bariatric Surgery in Patients with BMI 50-60 kg/m2 and BMI > 60 kg/m2.
- Anastomotic marginal ulceration after conversion of sleeve gastrectomy to Roux-en-Y gastric bypass.
- Truncal Vagotomy and Gastrojejunostomy Revision for Treatment of Marginal Ulcer.
- Sleeve Gastrectomy to Roux-en-Y Gastric Bypass Conversion Versus Primary Roux-en-Y Gastric Bypass: Impact of Robotic Platform on Propensity-Matched Outcomes.
- Robotic versus laparoscopic one anastomosis gastric bypass (OAGB): a propensity score-matched comparative study of perioperative outcomes in 200 patients.
- www.livhospital.com — source
- Is All Weight Loss Equal Following Sleeve Gastrectomy? Defining Body Composition and Anthropometric Thresholds for Hyperglycemia Remission in Women from a Prospective Cohort Study.
- Short-Term Evolution of MASLD Following Roux-en-Y Gastric Bypass: A Focus on Fibrotic MASH.
- Changes in the Bone Mineral Density after Sleeve Gastrectomy vs. Roux-En-Y Gastric Bypass 2 Years after Surgery.
- Management of Recurrent Weight Gain After Sleeve Gastrectomy: Comparative Effectiveness of Conversion Procedures Versus Obesity Management Medications.
- Long-Term Anatomical Durability and Clinical Outcomes of Concomitant Laparoscopic Sleeve Gastrectomy and Hiatal Hernia Repair: Up to 10-Year Multicenter Analysis.
- Laparoscopic Revision of Sleeve Gastrectomy with Only Hiatal Hernia Repair for Gastroesophageal Reflux Disease: A Retrospective Study.
- Impact of Endoscopic Bariatric and Metabolic Therapies on Chronic Kidney Disease in Patients with Impaired Glycemic Control.
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