Page 2 - Best gastroenterologists in Istanbul: TOP 39 doctors

Dr. Suleyman Guray is a gastroenterology specialist at Memorial Göztepe Hospital in Istanbul (2025–present). He previously worked at Medicana Izmir International Hospital (2025) and Izmir Katip Çelebi University Ataturk Training and Research Hospital (2018–2025).

He earned his MD from Ege University (1996–2002). He completed his specialization in Internal Medicine at Bozyaka Training and Research Hospital (2004–2009). He is a member of the Turkish Society of Gastroenterology and the Gastrointestinal Endoscopy Society.

His advanced endoscopy training includes CHA Bundang Medical Center. He also attended the Manchester Advanced Endoscopy Symposium and the International Congress of Gastroenterology Research, Endoscopy, and Training Society.

Education & Expertise

1995 to 2001 | Ege University Faculty of Medicine – Medical Education

2001 to 2006 | Dokuz Eylül University Faculty of Medicine – Internal Medicine Specialization

2008 to 2011 | Göztepe Training and Research Hospital – Gastroenterology Subspecialty

2014 | Ümraniye Training and Research Hospital – Associate Professor of Gastroenterology

2021 | University of Health Sciences – Professor

Professional Experience

2007 | Nusaybin State Hospital – Internal Medicine Specialist (Civil Service Obligation)

2011 to 2014 | Ümraniye Training and Research Hospital – Gastroenterology Specialist

2014 to 2017 | Ümraniye Training and Research Hospital – Associate Professor of Gastroenterology

2017 to 2021 | Health Sciences University – Associate Professor of Gastroenterology

2015 to 2021 | Ümraniye Training and Research Hospital Gastroenterology Clinic – Clinic Chief

2021 to 2022 | University of Health Sciences – Professor of Internal Medicine and Gastroenterology

2015 to 2022 | Genomic Laboratory (GLAB) Coordinator, Istanbul Provincial Health Directorate

2014 to 2021 | Northern Clinics of Istanbul Journal (indexed in WoS and PubMed) – Founding Editor

2021 to Present | Turkish Liver Research Association – Board Member

2022 to Present | Hepatology Bulletin Journal – Editor

2019 to Present | Hepatology Forum Magazine – Editor

2016 to Present | World Journal of Hepatology – Editor

International Experience

1999 | Trainee Doctor, Regional Infectious Diseases Unit, Western General Hospital, Edinburgh, UK

2000 | Trainee Doctor, Cardiology Unit, North Manchester General Hospital, Manchester, UK

2005 | Assistant Doctor, Regional Infectious Diseases Unit, Western General Hospital, Edinburgh, UK

Professional Memberships

Turkish Gastroenterology Association

Turkish Liver Research Association

EASL – European Association for the Study of Liver

APASL – Asian Pacific Association for the Study of Liver

AAAS – American Association for the Advancement of Science

Awards & Recognitions

2013 | Liver Fibrosis Pathways in Chronic Hepatitis B: A Comparative Proteomic Study – Gilead Fellowship Award

2014 | Liver Fibrosis Pathways in Chronic Hepatitis B: A Comparative Proteomic Study – Viral Hepatitis Fight Association Project Support Award

2014 | The Relationship between Spontaneous Seroconversion and Toll-Like Receptor Gene Polymorphism in Hepatitis B Infection – Turkish Gastroenterology Association, Best Poster Second Prize

2015 | Research on Damage Pathways in Liver Tissue in Chronic Hepatitis B: A Comparative Proteomic Study – Turkish Gastroenterology Association, Best Oral Presentation Third Prize

2016 | Investigations of the EGF and Its Receptor EGFR Gene Variants in Ulcerative Colitis – XV Euroasian Congress of Gastroenterology and Surgery, Best Oral Presentation Third Prize

Dr. Mustafa Aydın is an Internal Medicine specialist. He graduated from Gazi University Faculty of Medicine in 2009. He provides evidence-based care for adults, including diagnosis and treatment. He communicates in English.

His clinical focus includes chronic disease management, such as diabetes, hypertension, high cholesterol, and thyroid disorders. He treats gastrointestinal problems, including reflux, gastritis, ulcers, and liver diseases, and respiratory diseases like asthma and COPD. He manages infectious diseases. He provides preventive care with routine screenings, risk assessments, and personalized health plans.

Dr Nimet Ozcan is a dermatologist with over 10 years of experience. She graduated from the Erciyes University Faculty of Medicine in 2008. She completed her dermatology specialization at Ankara Numune Training and Research Hospital in 2014. She provides care in both medical and cosmetic dermatology.

Clinical focus: acne, eczema, psoriasis, and fungal and bacterial infections. Dermato-oncology with early detection and surgical excision of suspicious lesions. Dermal fillers, chemical peels, and mesotherapy. Laser treatment for vascular lesions, pigmentation disorders, and hair removal. Pediatric dermatology. Languages: English.

Dr. Ozlem Yogurtcu is a general surgeon with extensive experience. She graduated from Dokuz Eylul University Faculty of Medicine. She completed her general surgery residency at Haseki Training and Research Hospital, 1st Surgical Clinic. She is fluent in English.

Her practice includes gastrointestinal surgery (gallbladder disease, hernias, appendicitis, other gastrointestinal conditions). It also includes endocrine surgery (thyroid, parathyroid, adrenal) and breast surgery (benign and malignant conditions). She treats emergency and trauma cases. She performs minimally invasive laparoscopic procedures.

She is known for precise surgery and a patient-centered approach.

Dr Erdem Gelegen is an ophthalmologist with over 20 years of experience in cataract, refractive, retinal, glaucoma, and corneal/anterior segment care. He performs phacoemulsification with premium intraocular lenses. He provides laser vision correction for myopia, hyperopia, and astigmatism. He treats diabetic retinopathy, age-related macular degeneration, retinal detachment, keratoconus, and anterior segment disorders, including corneal transplants.

He graduated from Istanbul University Cerrahpaşa Faculty of Medicine in 1999. He completed his ophthalmology residency at Okmeydanı Training and Research Hospital in 2004. He is known for precise microsurgery and the use of advanced ophthalmic technologies.

Dr. Cevat Azeroglu is a radiologist. He graduated from the Tabriz University Faculty of Medicine in 1987. He completed his radiology specialization at Ondokuz Mayıs University in 2011. Born in 1959, he provides advanced imaging to support accurate, timely decisions for many specialties.

His expertise includes conventional radiology with X-rays for musculoskeletal and chest disease. He performs ultrasound of the abdomen, thyroid, vessels, and soft tissues. He interprets CT and MRI for neurological, cardiovascular, and oncologic conditions. He practices interventional radiology with image-guided, minimally invasive procedures. He also focuses on oncologic imaging for staging and follow-up. He is known for diagnostic precision, use of modern imaging tools, and strong teamwork.

Dr. Derya Zengin Metli is a physician specialized in physical therapy and rehabilitation. She graduated from Akdeniz University Faculty of Medicine. Her practice includes physical therapy and physiotherapy services. She also consults in English.

Her clinical scope includes musculoskeletal rehabilitation for back, neck, and joint pain, and herniated discs. She provides neurological rehabilitation for stroke and multiple sclerosis. She also offers post-surgical rehabilitation after orthopedic and neurosurgical procedures, sports injury prevention and treatment, and chronic pain management for fibromyalgia and arthritis.

Dermatologist Dr. Osman Serdar Akkaya graduated from Çukurova University Faculty of Medicine in 1981. He completed his dermatology specialization there in 1985. He has more than 35 years of experience and is among the most senior dermatologists in the region.

His practice includes general dermatology, such as psoriasis, eczema, acne, vitiligo, and urticaria. He focuses on dermato-oncology and performs surgery for benign and malignant skin tumors. He also offers cosmetic dermatology, including fillers, mesotherapy, and chemical peels. He provides laser and light-based treatments for vascular lesions, pigment disorders, scars, and hair removal. He treats geriatric skin conditions and chronic skin diseases.

Dyt. Yaren Nur Güngör is a dietitian. She graduated from the Faculty of Nutrition and Dietetics. She provides evidence-based, personalized nutrition counseling in English. She designs tailored programs for health promotion, disease management, and weight control.

Her clinical focus includes diet plans for diabetes, heart disease, thyroid disorders, and other metabolic issues. She also guides weight loss and gain and improves body composition. She offers sports nutrition and nutrition care for children and teens. She provides preventive nutrition with lifestyle counseling. Her approach is patient-centered and motivating.

Prof. Dr. Kamil Yalçın Polat is a leading transplantology expert and Head of the Organ Transplantation Center at Memorial Bahçelievler Hospital in Istanbul. With over 30 years of surgical experience, he founded the Organ Transplantation Center at Atatürk University (2003-2010) and completed fellowships at Mount Sinai Hospital and Memorial Sloan Kettering Cancer Center in New York. Dr. Polat has authored more than 50 scientific publications and serves as Vice President of the Turkish Hepatopancreatobiliary Surgery Society.

Prof. Dr. Erman Aytac is a distinguished surgeon and academician specializing in colorectal surgery, digestive system oncology, and minimally invasive surgical techniques. Currently serving as a Professor of Surgery at Memorial Healthcare Group's Bahçelievler Hospital in Istanbul, he combines advanced surgical expertise with extensive research experience to provide comprehensive care for patients with complex gastrointestinal conditions.

Dr. Eda Tereh Akay is a general surgeon. She completed specialty training in general surgery and provides patient-centered care with modern techniques.

Her expertise includes gastrointestinal surgery (gallbladder, hernias, appendicitis, gastrointestinal tract disorders), endocrine surgery (thyroid, parathyroid, adrenal), breast surgery (benign and malignant), minimally invasive laparoscopic procedures, and emergency and trauma surgery. She is known for precise surgical skills and a strong focus on patient safety.

2021 - Present, Istanbul/Türkiye

MEMORIAL BAHCELIEVLER HOSPITAL

INTERNAL DISEASES AND GASTROENTROLOGY SPECIALIST

2014 - 2021, Gaziantep/Türkiye

GAZİANTEP UNIVERSITY FACULTY OF MEDICINE INTERNAL DISEASES DEPARTMENT/GASTROENTEROLOGY DEPARTMENT LECTURER

2012 - 2014, Gaziantep/Türkiye

GAZİANTEP ŞEHİT KAMİL STATE HOSPITAL GASTROENTEROLOGY DEPARTMENT (COMPULSORY SERVICE)

Education:

• Bachelor of Science (MD): Faculty of Medicine, Uludag University, 1989

Specialized Education and Experience:

• General Surgery Specialist Degree: Ankara Numune Training and Research Hospital, 1997
• Fellowship: Gastroenterology Surgery, Türkiye High Specialization Hospital, 2005

Academic Career:

• Associate Professor: General Surgery, Inonu University, 2011
• Professorship: General Surgery, İnönü University, 2017

Pediatrician, Pediatric Gastroenterology and Nutrition Specialist

Education

Yeditepe University School of Medicine

Professor of Pediatrics (Chair of the Department)

2004 - 2007

Dokuz Eylül University School of Medicine

Pediatric Gastroenterology Sub-specialty

1995 – 1998

Hacettepe University School of Medicine

Pediatrics Instructor

1985 - 1987

Professional Experience

Ataşehir Florence Nightingale Hospital

Pediatrician, Pediatric Gastroenterology

2017 – Present

Kadıköy Şifa Ataşehir Hospital

Pediatric Gastroenterology and Nutrition

2013 – 2017 

Dokuz Eylül University School of Medicine

Professor of Pediatrics

1994 – 2004

Publications

Cevik N, Buyukgebiz B. Interaction between human blood group (ABO) substances and enteropathogenic

bacterial agents. Turk J Pediatr. 1987. Link

Buyukgebiz B, Ozalp I, Oran O. Investigation of serum vitamin A levels of children who had a history of

recurrent diarrhoea. J Trop Pediatrics. 1990. Link

Languages

Turkish: Native

English: Advanced

Education

2005 – M.D., Istanbul University, Istanbul Faculty of Medicine

2010 – Internal Medicine Specialization, Haseki Training and Research Hospital

2021 – Gastroenterology Subspecialty Training, Sakarya University Faculty of Medicine

Academic & Professional Experience

Assistant Professor, Istanbul Florence Nightingale Hospital

Assistant Professor, Istanbul Bilim University Faculty of Medicine

Assistant Professor, Istanbul Yeni Yüzyıl University Faculty of Medicine

Head of Department, Giresun University Faculty of Medicine

Scientific Publications

Dr. Acar has authored over 20 international peer-reviewed articles in the fields of internal medicine and gastroenterology. Her notable contributions include studies and case reports on:

Gastrointestinal bleeding management in anticoagulant users

Rare GI cases such as bezoars, aortoesophageal fistulas, and massive hemorrhagic ascites

Liver transplantation complications, including graft-versus-host disease

The role of (pro)hepcidin in IBD-related anemia

Endoscopic interventions for acute GI bleeding

Covid-19 treatment agents and their GI implications in Turkey

(Full publication list available upon request)

Clinical Expertise

Gastrointestinal bleeding & endoscopic procedures

Hepatology & liver disease management

Inflammatory bowel diseases (IBD)

Complex GI case diagnostics

Post-transplant GI complications

Diabetic GI and cardiovascular comorbidities

Prof. Selin Kapan has been a Professor of General Surgery since 2017. She is currently with Istanbul Aydın University, Faculty of Medicine, Department of General Surgery (2022–present). She previously worked at Bakırköy Dr. Sadi Konuk Training and Research Hospital as a Specialist and Associate Professor. She also served as Educational and Administrative Supervisor at Kanuni Sultan Süleyman Training and Research Hospital. In addition, she was Medical Coordinator and General Surgeon at Istanbul Surgery Hospital.

She has authored or co-authored more than 50 peer-reviewed papers. Her research covers hernia repair, perianal fistula, pilonidal disease, hepatic hydatid disease, laparoscopic surgery, and gastrointestinal surgery. Her work has been published in journals such as Digestive Surgery, Hernia, Techniques in Coloproctology, and the Journal of Gastrointestinal Surgery. She is a member of the Turkish Surgical Association, the National Trauma and Emergency Surgery Association, the Hernia Society, the Turkish HPB Surgery Association, the Stem Cell and Cellular Therapies Association, and the Gastroesophageal Reflux Association.

Assoc. Prof. Dr. Saydam Mehmet is a general surgeon at Lokman Hekim Istanbul Hospital (2025–present). His work covers oncologic, endocrine, and metabolic surgery. He performs laparoscopic surgery, including hernia repair and anti-reflux procedures. He also treats morbid obesity and type 2 diabetes. Sleeve gastrectomy is among his key procedures.

Education: He graduated from the Gülhane Military Medical Academy, Faculty of Medicine (1995–2001). He completed his general surgery residency there (2004–2009). He was a research fellow at the University of Miami/Jackson Memorial Hospital, Ryder Trauma Center (2015–2016).

Experience: He worked as a general surgery specialist at GATA Haydarpaşa, Girne Military, and Mevki Military. He later served as Associate Professor of General Surgery at Dışkapı, Sancaktepe, and Medical Park Gebze. Earlier, he practiced as a general practitioner in military medical services.