Gastroenterology Prof. Dr. Hakan Ümit Ünal
✓ Medically verified profileProf. Dr. Hakan Ümit Ünal
✓ Medically verified profile
Quick answer
Prof. Dr. Hakan Ümit Ünal is a gastroenterology specialist at Acibadem Bakırköy Hospital. He treats digestive conditions, with particular interests in endoscopy, inflammatory bowel diseases such as Crohn’s disease and ulcerative colitis, and pancreas, liver and biliary tract diseases. He also performs endoscopic sleeve gastroplasty.
About Prof. Dr. Hakan Ümit Ünal
Prof. Dr. Hakan Ümit Ünal is a gastroenterology specialist at Acibadem Bakırköy Hospital. His clinical interests include endoscopic sleeve gastroplasty, endoscopy, inflammatory bowel disease, and diseases of the pancreas, liver and biliary tract, including fatty liver disease and liver failure.
He graduated from Gazi University Faculty of Medicine in 1998, completed Internal Medicine training at Başkent University Faculty of Medicine in 2003, and completed Gastroenterology training there in 2006. His career has included roles at Diyarbakır State Hospital, Diyarbakır Military Hospital, Başkent University Istanbul Hospital, Memorial Hizmet Hospital, and Acıbadem Healthcare Services since 2024.
International patients can expect a gastroenterology assessment focused on their symptoms, medical history and appropriate endoscopic or medical evaluation. Prof. Dr. Ünal provides care within the Gastroenterology unit and the Treatment of Pancreas, Liver and Biliary Tract Diseases unit at Acibadem Bakırköy Hospital.
Areas of Expertise
Conditions treated and procedures performed by this specialist.
Subspecialties
- Treatment of Pancreas, Liver and Biliary Tract Diseases
Education
- 2006Başkent University Faculty of Medicine Gastroenterology
- 2003Başkent University Faculty of Medicine Internal Medicine
- 1998Gazi University Faculty of Medicine
Professional Experience
- 2024Acıbadem Healthcare Services
- 2015–2017Memorial Hizmet Hospital
- 2010–2015Başkent University İstanbul Hospital Gastroenterology
- 2008–2009Diyarbakır Military Hospital / Gastroenterology / Military Service
- 2007–2009Diyarbakır Devlet Hospital / Mecburi Hizmet
Professional Memberships
- Turkish Gastrointestinal Endoscopy Association
- Clinical Enteral Parenteral Nutrition Association
- Türk Gastroentroloji Association
- Turkish Liver Research Association
Selected Publications
- Lack of relationships between FGF19 staining pattern,lymph node metastasis and locally invasive characteristics of the tumor in colorectal cancers. Asian Pac J Cancer Prev. 2013;14(5):3151-4. Unal HU.Demiralay E, Tepeoglu M, Fidan C, Kilickap S.
- Black punctate appearance in the rectum. Endoscopy 2011: 19(1): 35-3 Ünal HU, Seçmen Ü, Korkmaz M, Yılmaz U.
- Gaucher’s Disease Presenting with Massive Hepatic Fibrosis and Skeletal Abnor malities: A Case Report with Review of the Literature. Türkiye Klinikleri J MedSci 2011; 31(3): 752-8 Yalcin K, Uchmak F, Bektas R, Unal H.U, Necmioglu S, Mızrak B.
- ExtraordinarilyElevated Serum Level of CA 19-9 and Rapid Decrease After Succesfull Therapy A casereport andreview of literature. Turk J Gastroenterol 2010; 21 (4): 461¬463 Korkmaz M, Unal H, Selcuk H, Yilmaz U.
- A cute Pancreatitis Following Doxycycline and Ornidazole Coad ministration. JOP. J Pancreas. 2010 Nov 9: 11(6): 614-616 Ocal S, Selcuk H, Korkmaz M, Unal H, Yilmaz U.
- Polypoid formation in terminal ileum Endoscopy 2010: 18(1): 23 Ünal H, Kalaycı S, Korkmaz M, Savaş N, Selçuk H.
- When Should ERCP Be Performed in Biliary Pancreatitis? Endoscopy 2009; 17(2): 94-98 Korkmaz M, Unal H, Selcuk H, Yilmaz U.
- Subacutely formed bezoar resulting from accidentally ingested industrial materia Selcuk H, Unal H, Korkmaz M, Yilmaz U
- Original Images: Asymptomatic elderly patient diagnosed with patent ductusvenosus. Academic Gastroenterology, 7 (3) 2008: 127-128 Ünal H, Korkmaz M, Kırbaş İ, Selçuk H, Yılmaz U
- What Chronic C Hepatitis Looks Like but Cannot Be Seen: Lichen Planus Güncel Gastroenterology 12 (3) 2008: 146-150 (2008) Ünal H, Selçuk H,
Frequently Asked Questions
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A dedicated team, from first message to follow-up
Our international patient office coordinates your appointment, travel and treatment across the Acıbadem network — including 7 JCI-accredited hospitals — and stays with you in your own language, every step of the way.
Schedule your appointment with Prof. Dr. Hakan Ümit Ünal
Choose a date and time that suits you. Our international patient team will check availability and confirm your appointment — usually within 24 hours.
- 1Choose your date & timePick a preferred day and time slot for your visit.
- 2Share your detailsTell us how to reach you and anything we should know.
- 3We confirm with youOur team confirms the appointment by phone or email.
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Your information stays strictly confidential and is used only to arrange your care.
Hospitals
Medical Units
Treatments Performed
What patients say about Prof. Dr. Hakan Ümit Ünal
★★★★★From 2,400+ verified patient reviews“My rotator cuff repair was handled with real skill and genuine care. Assoc. Prof. Dr. Tunali answered all of my questions with patience.”
“I was nervous about my thyroid treatment, but I felt safe at every single step. Assoc. Prof. Dr. Ünal answered all of my questions with patience. I have already recommended Acibadem to my family.”
“The care I received for my diabetic eye care was world-class from start to finish. Dr. Tüzünalp explained the risks honestly and earned my full trust. I have already recommended Acibadem to my family.”
“My gastrointestinal cancer surgery exceeded every expectation I had. Asst. Prof. Dr. Ünal kept me informed and reassured throughout. The follow-up care was just as good as the treatment itself.”