Page 4 - Best gastroenterologists: TOP 198 doctors

Dr. Sebastian F. Schoppmann is an expert in general and visceral surgery. He has focused on upper gastrointestinal (GI) surgery since 2007. He leads the Gastroesophageal Tumor Unit (CCC-GET) at the Comprehensive Cancer Center Vienna. He is also an Associate Professor of Surgery at the Medical University of Vienna.

Dr. Schoppmann has published over 240 peer-reviewed articles. He serves as a consulting or associate editor for several leading surgical and oncology journals. He is the General Secretary of the Austrian Society of Surgical Oncology. He has also held important leadership roles in surgical oncology organizations. His work has helped advance upper-GI cancer surgery.

Dr. Camel Kopty combines advanced internal medicine and hematology/oncology expertise with a patient-focused approach at Wiener Privatklinik.

• Specializes in systemic therapies like chemotherapy and immunotherapy
• Trained at Medical University of Vienna – one of Europe's top medical schools
• Focuses on holistic and supportive care for complex conditions
• Participated in clinical oncology research for new systemic therapies

Dr. Krol leads a certified Obesity Treatment Center at St. Martinus-Krankenhaus Düsseldorf, combining surgical and endoscopic expertise for comprehensive digestive care.

• Chief of Gastroenterology with 20+ years of experience
• Specializes in advanced pancreatic and liver disease management
• Uses cutting-edge endoscopic techniques for precise diagnostics
• Integrates cardiology and diabetology expertise into GI treatments

1,100+ procedures performed – Dr. Rossol specializes in advanced endoscopic techniques at Nordwest Clinic.

• Fellow of the European Board of Gastroenterology
• Expert in endoscopic mucosal resection (EMR) and dissection (ESD)
• Trained at King's College London's Institute of Liver Studies
• Member of multiple prestigious liver and digestive disease societies
• Published in national and international medical journals

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Dr Murat Erol specializes in comprehensive dental treatments with over 20 years of experience, focusing on both functional oral health and aesthetic outcomes.

• Expert in preventive dentistry and long-term oral health follow-up
• Skilled in restorative dentistry including aesthetic fillings and crowns
• Provides advanced root canal techniques to preserve natural teeth
• Offers aesthetic dentistry services like teeth whitening and smile design
• Experienced in prosthetic dentistry for fixed and removable treatments

Director of Gastroenterology at Na-Eun Hospital – specializes in advanced endoscopic procedures like ESD for early cancer detection.

• Board-certified subspecialist in gastrointestinal endoscopy
• Expert in small-bowel capsule endoscopy for complex cases
• Life member of Korean Society of Gastrointestinal Endoscopy
• Trained at top Korean medical institutions

Dr. Suleyman Guray specializes in advanced endoscopic interventions at Memorial Göztepe Hospital, with training from CHA Bundang Medical Center and Manchester Advanced Endoscopy Symposium.

• Over 15 years of experience in gastroenterology
• Member of Turkish Society of Gastroenterology and Gastrointestinal Endoscopy Society
• Trained at prestigious institutions for advanced endoscopic techniques
• Specializes in internal medicine with a focus on gastroenterology

Education and Expertise

• 2023 BAKIRÇAY UNIVERSITY ÇİĞLİ TRAINING AND RESEARCH HOSPITAL (ASSOCIATE PROFESSOR)
• 2021 EGE UNIVERSITY FACULTY OF MEDICINE GASTROENTEROLOGY DEPARTMENT
• 2017 EGE UNIVERSITY INTERNAL MEDICINE DEPARTMENT
• 2010 EGE UNIVERSITY FACULTY OF MEDICINE

Diseases

• Liver Diseases
• Digestive System Diseases

Treatment Methods

• Endoscopy
• Endoscopic mucosal resection – EMR
• Endoscopic Obesity Treatment (Intragastric Botox, Intragastric Balloon)
• Endoscopic Polypectomy
• Endoscopic Retrograde Cholangio Pancreatography (ERCP)
• Liver Transplant
• Colonoscopy
• Peroral Cholangioscopy

Experience

• Diyarbakir 112 Emergency Health Services Chief Physician (2010-2011)
• Ege University Faculty of Medicine, Department of Internal Medicine (2012-2017)
• Ayvalik State Hospital (2017-2018)
• Ege University Faculty of Medicine, Department of Gastroenterology (2018-2021)
• Burdur State Hospital (2021-2022)
• Bakırçay University Çiğli Training and Research Hospital (2022-2024)

Professional Memberships

• 1.Turkish Gastroenterology Association (ERCP working group)
• 2. Turkish Liver Research Association
• 3. Turkish Medical Association

Dr. Guliyeva specializes in inflammatory bowel diseases like Crohn's and colitis, combining 21+ years of gastroenterology with bioregulatory medicine approaches.

• Trained at Ege University and Sisli Etfal Hospital in inflammatory bowel diseases
• Certified in homotoxicology, acupuncture, and neurotherapy from German and Turkish programs
• Focuses on precancerous GI conditions and autoimmune digestive disorders
• Uses integrative treatments including PRP-CGF therapy and serum ozonation

In 2007 he joined the Costa del Sol Hospital and left this position when he obtained an international scholarship that would take him back to San Francisco. In 2010 he moved to Japan to complete his training in the submucosal endoscopic dissection technique that he would later on introduce in Andalusia in 2011, thus becoming one of the pioneers in the performance of this technique in Spain. In 2011 he became the first medical professional in the world to use the 15-mm AXIOS stent in pancreatic fluid collection drainage. In 2018 he began to perform gastroenteroanastomosis with luminal apposition stent in patients with pancreatic cancer and bowel obstruction, thus becoming a pioneer in Andalusia to perform such technique.

He is a coauthor of the reference guides of the European Society of Gastrointestinal Endoscopy on the endoscopic treatment of chronic pancreatitis and non-variceal gastrointestinal haemorrhage.

Professional Experience

Over 24 years' experience

1999 - Degree in Medicine and Surgery. Malaga University, Spain.

2003 to 2006 - Medical Residency in the Digestive System at the Virgen Macarena Hospital in Seville, Spain.

2006 - International Scholar at the California Pacific Medical Center in San Francisco, USA.

2007 – Digestive System Specialist at the Costa del Sol Hospital, Marbella. Spain.

2008 - California Pacific Medical Center in San Francisco, USA.

2009 - Top Reviewer Award received from the Gastrointestinal Endoscopy Journal.

2011 – Pioneer in Spain in the introduction of the submucosal endoscopic dissection technique.

2011 – First professional in the world to use the AXIOS (15mm) stent for pancreatic fluid collection drainage.

2016 - Gold Medal of the Andalusian Society for Digestive Disease (SAPD, in its Spanish abbreviation).

2017 - Fellow of the American College of Gastroenterology (FACG).

2018 - Pioneer in Andalusia to perform gastroenteroanastomosis with luminal apposition stent to treat bowel obstruction.

2019 - Fellow of the American Society for Gastrointestinal Endoscopy (FASGE).

The Digestive System Unit of the Quirónsalud Marbella Hospital offers a patient service portfolio that includes all the clinical aspects of gastroenterology, hepatology, biliary duct and pancreatic disease, as well as the diagnostic and treatment techniques used in this speciality such as abdominal ultrasound, endoscopy and other functional tests.

Our specialists have solid professional backgrounds and the team is highly qualified for the diagnosis and treatment of complex diseases such as conditions related to acidity (gastric ulcers, helicobacter pylori, gastroesophageal reflux disease), enteropathies (Crohn's Disease, ulcerative colitis; coeliac disease...), viral hepatitis, hepatic cirrhosis, pancreatic disease...

The Digestive System Unit of the Quirónsalud Marbella Hospital is a pioneer in the implementation of a specific check-up programme for digestive disease with special attention to the diagnosis and treatment of colon precancerous lesions.

Diseases, treatments and techniques:

• Diagnostic and therapeutic endoscopic ultrasound

• Endoscopic resection techniques (mucosectomy/submucosal dissection)

• Submucosal or third-space endoscopy (POEM and variants)

• Bariatric endoscopy (Apollo Method)

Dr Mustafa Aydin specializes in gastrointestinal disorders, offering expert care for reflux, gastritis, ulcers, and liver diseases.

• 15+ years of experience in Internal Medicine
• Evidence-based approach for accurate diagnosis and treatment
• Focuses on preventive strategies for long-term health
• Provides comprehensive care for chronic conditions

Dr. Holovyna Svitlana is a gastroenterologist and nutritionist with more than 23 years of experience. She is a member of the Association of Dietitians and Gastroenterologists of Ukraine. She also belongs to the European Association for the Study of the Liver (EASL) and the Association of Preventive and Anti-Age Medicine.

Dr. Holovyna diagnoses and treats gastrointestinal disorders, metabolic diseases, and nutrition-related issues. She uses an integrated and evidence-based approach. Her focus is on restoring digestive health, managing chronic conditions, and improving patient well-being with personalized diet and treatment plans.

Dr. Seymur Aslanov is a specialist in internal medicine and gastroenterology. He received advanced training at Ege University Faculty of Medicine Hospital. Dr. Aslanov diagnoses and treats many gastrointestinal diseases. His expertise includes inflammatory bowel diseases, digestive system cancers, liver and pancreatic diseases, and gastrointestinal bleeding.

He is skilled in advanced endoscopic procedures. These include ERCP, colonoscopy, endoscopic polypectomy, and stenting for gastrointestinal stenosis. Dr. Aslanov has worked as a research assistant and subspecialist at Ege University. He has also served as an internal medicine specialist at Izmir Medical Point.

He is a member of the Izmir Medical Chamber.

Professor Doganay has 20+ years in gastroenterology, specializing in liver and digestive disorders with award-winning research at VM Medical Park Pendik Hospital.

• Board-certified with subspecialty training at Göztepe Training and Research Hospital
• Editor for World Journal of Hepatology and other leading journals
• Recipient of multiple awards from Turkish Gastroenterology Association
• Board member of the Turkish Liver Research Association
• Former Clinic Chief at Ümraniye Training and Research Hospital

Education

-1993 Uludag University, Bursa School of Medicine

-2007 Haydapasa Numune Hospital General Surgery Residency

Experience

• - 1993-1998 Haydapasa Numune Hospital, General Surgery Assistant Surgeon
• - 1998-2017 Private Hospitals , General Surgery Specialist 
• - 2017-2022 Adatip Istanbul Hospital, Assistant Professor of General Surgery
• - 2022 Lokman Hekim Istanbul Hospital, Assistant Professor of General Surgery

Memberships

• Turkish Medical Association 

• Turkish Society for Colon and Rectal Surgery 

• International Federation for Obesity Surgery 

• Mediterranean Societo of Coloproctology

Publications

• - 34 International Publications 
• - 35 National Publications 
• - 45 National and International Congress

Professor Prager has performed over 3,000 bariatric operations and presides over Europe's leading metabolic surgery society.

• Head of the Obesity Outpatient Clinic at Vienna General Hospital
• Leads the Metabolic Surgery Center at Confraternitaet Private Hospital
• Member of multiple international surgical societies, including the American Society for Metabolic & Bariatric Surgery
• Specializes in all kinds of bariatric surgery for obesity treatment

Gastroenterology

Pendik Medipol University Hospital

Education

1999 Karadeniz Technical University, Gastroenterology

1997 Atatürk University, Internal Diseases Professorship

1992 Atatürk University, Internal Diseases Associated Professorship

1985 Atatürk University, Internal Diseases Specialist

1981 Atatürk University Faculty of Medicine

Publications

1- Nihat Okçu Gülçin Polat, Arif Yılmaz, Mehmet Koruk, The demographic features of gastric cancers in Erzurum(Eurasian J Med 2000; 32: 63-65)

2- An Evaluation of Upper Gastrointestinal Bleeding Cases. Clinical Sciences-Doctor.2000, - E.akarsu,N.Okçu,et Ark.Northeast Anatolia 6:4:435-438

3-N.Okçu, A.yılmaz. İ.kiki,MDonuk, C.gündoğdu, H.uzunismail. Our Diagnostic Upper Gastrointestinal Endoscopy Results. Atatürk University Medical Journal 1997,29 (2):486

4-N. Okçu, M.gündoğdu, MD onuk, İ.kiki, l.cerrahoğlu, k.yılmaz, I. çapoğlu. The Role of Misoprostol in Preventing Gastroduodenal Lesions in Patients Using Nonsteroidal Anti-Inflammatory Drugs (NSAIDs). Atatürk University Medical Journal 1997,29 (2):453-455.

5-N.Okçu, A. Öz, MD Onuk, E.Akarsu, B. Tekin, Hz Tonbul, H.Kaya. Plasma Fibronectin Levels in Chronic Active Hepatitis and Decoction of Liver Parenchymal Insufficiency and Their Relationship with Liver Functional Status. Turkish J. Gastroenterol 1995;27(4): 422-426.

6-N.Okçu, Tahir Buran, MD Onuk, A. Yılmaz, E.Akarsu, G. Akçay. Prevalence of Helicobacter Pylori in Patients with Duodenal Ulcer in Erzurum and Surrounding Area. Turkish J. Gastroenterol 1995;27(4): 447-450.

7-N.Okçu, bs awake, e. akarsu, e. bakan, z. tonbul. Importance of Carbohydrate Antigens (CA-19-9, CA-125), Carcinoembryonic Antigen (CEA) and Alkaline Phosphatase in Gastric and Colorectal Cancers. Turkish J. Gastroenterol 1995;6:467-471.

8-N. Okçu, MD Onuk, E. Akarsu, H. Doğan, C. Gündoğdu. Major Risk Factors in Patients with Hepatocellular Carcinoma in Our Region. Gastroenterology 1994;5(2):154-157

9-N.Okçu, md. Onuk, e. akarsu, h. doğan, c.gündoğdu, tahir buran. Frequency of gastric carcinoma in Erzurum region, endoscopic and histological features. Gastroenterology 1994;5(2):263-267.

10-N. Okçu, MD Onuk, Tahir Buran, E. Akarsu, MA Çiftçioğlu. Frequency of Helicobacter Pylori in Nonspecific Gastritis Cases in Erzurum Province. Gastroenterology 1994;5(2):211-213.

11-N.Okçu, MD Onuk, Ö. Ünal, E. Akarsu, L. İncesu, K. Akgöz. Diagnostic Value of Ultrasound-Guided Fine Needle Aspiration Biopsy in Intra-Abdominal Mass Lesions. Gastroenterology 1993;4(1):166-68.

12-NOkçu, md. onuk, m. polat, a. yılmaz, m. gündoğdu, m. paç. Budd-Chiari Syndrome (2 Cases). Turkish J Gastroenterhepatol 1993; 4(1):77-80.

13-N.Okçu, H. Koçak, MD Onuk, M. Gündoğdu, E. Bakan, A. Yılmaz, A. Başoğlu, A. Ateş, F.A. Paç. The Effect of Atrial Pressure Changes and Cardiac Nerves on Plasma Atrial Natriuretic Peptide (ANP) Levels. Vascular Surgery 1993; 27(2): 128-132

15-N.Okçu, MD Onuk, A.Yılmaz, M. Gündoğdu, T. Buran. Effects of Omeprozole and Ranitidine on Peptic Ulcer Healing. Doğa-Tr.J. of Medical Sciences 1992;16:657-658.

16-N. Okçu, Mr. Yiğitoğlu, B. Adam, E. Bakan. The Effect of Digixin on Plasma Atrial Natriuretic Peptic Level in Patients with Congestive Heart Failure. S.Ü. Medical Faculty Journal 1991;7(2):243-247..

17-N.Okçu, A. Yılmaz. The Effect of Histamine H2 -Receptor Antagonists in Upper Gastrointestinal System Bleeding. Endoscopy Journal 1991;2(4):17-23.

18-N.Okçu, E. Bakan, B. Adam, A. Yılmaz, Mr. Yiğitoğlu. Sex Hormones and Sex Hormone Binding Globulin Levels in Patients with Chronic Hepatitis and Liver Cirrhosis (Letter to the Editor). Nature-Tr. J. Of Medical Sciences 1991;15:1-2.

19-N.Okcu Ömer Yılmaz.Helıcobacter pylori and related gastrointestinal system diseases. Turkish Clinics JMed Sci. 2013;33(3):806-13

20-Nihat Okçu, Ömer Yılmaz, Hakan Dursun, Gülçin Polat. The relationship between dyspeptic symptoms, nutritional habits, endoscopic and histological findings (Eurasian J Med 2006; 38: 13-17)

21-Mehmet Bilici,1Nihat Okcu,1Kerim Cayir,1Ibrahim Pirim,2Salim B. Tekin,1andCemal Gundogdu3 - Distribution of HLA Tissue Groups in Patients with Gastric Cancer Eurasian J Med. 2010 Apr; 42(1): 9.11.

22-Nihat Okcu,Abdulhalim Bak,Mehmet Sari,Mehmet Arslan,Sait Kapicioglu:The fibroblast proliferation, relationship of hepatocyte growth factor (HGF) and interferon-A2A Gastroenterology April 2000Volume 118,Issue 4, Part 2, PageA1404

23-Kubra Kaynar,Sait Kapicioglu,Mehmet Sari,Nihat Okcu,Abdulhalim Baki. The effect of fish oil on stress ulcer prophylaxis GastroenterologyVolume 118, Issue 4, Part 2, PageA1255