Hakan
Demirci
Gastroenterology and Hepatology Specialist
- Specialty Gastroenterology and Hepatology Specialist
- Experience 15+ Years
- Private Clinic Prof. Dr. Hakan Demirci Gastroenterology Clinic
About Me
Projects
Patients
My medical journey began in 1997 when I was accepted to the Gülhane Military Medical Academy (GATA) Medical School. I passed the Medical Specialization Exam (TUS) in 2006 and began my Internal Medicine residency at GATA Haydarpaşa Training Hospital. Between 2010-2011, I worked as an Internal Medicine specialist at the Presidential Campus. In 2011, I passed the Medical Subspecialty Exam (YDUS) and began my Gastroenterology subspecialty training at GATA Ankara.
In 2014, I was appointed as a Gastroenterology specialist to the GATA Ankara Gastroenterology Clinic. During this time, I worked particularly in the fields of microbiota, inflammatory bowel diseases (Ulcerative Colitis & Crohn's Disease), stem cell treatments, obesity, interventional endoscopic procedures, and functional medicine. I received "best oral and poster first place awards" at conferences organized by the Turkish Liver Research Association and the Turkish Gastroenterology Association. During the same period, I was awarded the "scientific work encouragement, internal sciences third place award" by GATA. In 2017, I successfully passed the Associate Professorship exam and received the title of Associate Professor Dr.
I have approximately 100 publications in international and national journals. I also authored book chapters. I served as a principal investigator in international comprehensive clinical research, particularly in phase 3 studies for the treatment of inflammatory bowel diseases.
In 2023, I was appointed to the Professor position at Fenerbahçe University. After working at Medicana Kadıköy Hospital from 2022-2025, I started accepting patients at my own clinic in December 2025.
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Internal Medicine and Gastroenterology Specialist
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Health Guide
You can read health articles prepared by Prof. Dr. Hakan Demirci here.
December 23, 2025
Bad Breath May Be Caused by Digestive Problems
It’s Possible to Speak Without Embarrassment
Halitosis, commonly known as bad breath, can affect social relationships. An unpleasant bad breath when interacting with other people can reduce a person’s self-confidence and negatively affect their communication with others. Gastroenterology Specialist Prof. Dr. Hakan Demirci, who states that “Although it is often associated with oral and dental health and ENT, sometimes gastrointestinal problems can also cause this condition,” points out that since gastroenterology is a branch that examines problems related to the digestive system, halitosis can sometimes originate in this field as well.
…February 24, 2024
Stomach Cancer
What is Stomach Cancer? Stomach cancer is a type of cancer that occurs as a result of abnormal growth and multiplication of stomach cells. The stomach, one of the digestive system organs, stores and digests food. Stomach cancer usually originates from mucosal cells and can spread to surrounding tissues in advanced stages.
…February 21, 2024
Obesity
Obesity has become a rapidly increasing health problem worldwide. Developing technology, changing lifestyles, and irregular eating habits cause many people to face weight problems. There are various methods to prevent and treat the negative effects of obesity on health. In this article, we will focus on methods such as medications, gastric botox, and gastric balloon used in the treatment of obesity.
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