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Koray Tuncer
23
years of experience

Koray Tuncer

  • Specialization: Gastroenterologist
  • 23 years of experience
  • Speaks:
    English
  • Workplace: Turkey, Istanbul, Memorial Şişli Hospital
  • Gastroenterologist with 5 international and 13 national publications, plus 8 international and 41 national presentations.

    Dr. Koray Tuncer is a gastroenterology specialist at Memorial Şişli Hospital in Istanbul. He has worked there since 2009. He previously served at Private Yunus Emre Hospital from 2003 to 2009.

    He earned his MD from Istanbul University, Istanbul Faculty of Medicine (1982–1988). He completed an Internal Medicine residency at SSK Okmeydanı Hospital (1989–1993). He served as Chief Assistant in Internal Medicine at Kartal Training and Research Hospital (1995–1998). He completed gastroenterology fellowships at Haydarpaşa Numune Hospital (1998–1999) and Ege University (1999–2003).

    Professional memberships include the Turkish Society of Gastroenterology, the Turkish Association for the Study of the Liver, and the Turkish Medical Association.

    He has 5 international and 13 national publications. He has delivered 8 international and 41 national presentations. His additional training includes summer internships at Kantonsspital Aarau (Anesthesiology, 1985) and Kantonsspital Münsterlingen (Internal Medicine, 1987). He regularly attends postgraduate gastroenterology and hepatology courses and national congresses.

4.7
Excellent score
20 patient verified reviews
1 star
5%
2 stars
0%
3 stars
0%
4 stars
20%
5 stars
75%

Patient reviews

About clinic Memorial Şişli Hospital
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1-5 of 20 reviews
Donna Barber • Neck lift
Canada
Nov 6, 2025
Verified review.
I’m so very glad I had the best doctor and best care
My arrival at Istanbul airport was smooth and efficient. I was met and transported to my hotel. My hotel was lovely. Transportation from hotel to hospitals on time and efficient. I met my advocate at international patient area, she had everything under control, all tests lined up and doctor appointments were fabulous. My advocate translated to my language at every appointment. I’m very happy with the service and I felt very “looked after”. My outcome is excellent and I’m so very glad I had the best doctor and best care.
About Bookimed service
Bookimed lovely to deal with. Reactive to my questions and concerns. Contacted me after surgery to inquire how I was doing. Very efficient with transfers.
Antonio Morales • Hair transplant
France
Jul 31, 2025
Verified review.
Whether it's the doctors, nurses or reception staff, many other hospitals should take inspiration from the Turkish hospital model
The quality of the hospital service is second to none, with well-organised, highly competent services that are always available to patients. Whether it's the doctors, nurses or reception staff, many other hospitals should take inspiration from the Turkish hospital model. The hospitals are like luxury hotels, you feel good, you are looked after and followed throughout your stay. Finally, the money I spent there was really justified. Thank you to everyone who looked after me during my 14-day stay. Of course I recommend Istanbul Memorial Hospital. Antonio. M
Damir Metenko • Autism treatment
Czech Republic
Jan 29, 2026
Verified review.
This created an impression of a professional and well-prepared approach
Our son is 6 years old and has been diagnosed with ASD. We arrived at Memorial Şişli Clinic on Monday. On the same day, we had a consultation with Dr. Betül Tavil. The doctor carefully examined our son and immediately began asking questions, to which she seemed to already have some answers. This created an impression of a professional and well-prepared approach. After the consultation, the doctor recommended stem cell therapy. With our consent, the cells were ordered immediately, considering they would be delivered to the clinic within three days. On the same day, we provided four vials of blood. Three days later, the stem cell administration procedure took place. The total dose consisted of 50 million cells: 1% was administered into the spinal cord, and the remainder was given via intravenous infusion. The procedure itself lasted approximately 10–15 minutes and went smoothly. Afterward, a supportive IV drip was administered to the child. Overall, we stayed in the hospital for about 4–4.5 hours, after which we were discharged. At this point, we have observed no side effects in the child.
Prompt service, and the doctor, Betul Tavil, is very personable and I confidently say she is truly a professional in her field.
About Bookimed service
Our experience collaborating with Bookimed was very pleasant. Communication was easy and clear — our messages were always answered promptly, all issues were explained in detail, and helpful advice was provided. When necessary, Bookimed representatives contacted us by phone, which was particularly convenient and reassuring. It felt like they genuinely wanted to help us, rather than just respond formally. Thank you to the Bookimed team for your support, attentiveness, and human approach. We are left with only positive impressions.
YULIIA • Consultation with a maxillofacial surgeon
United Kingdom
Jan 23, 2026
Verified review.
There is now hope that it will be possible to help her in the future
I am grateful to our translator Irina, who arranged an additional consultation with an ophthalmologist, and we received another opinion regarding my sister's vision. There is now hope that it will be possible to help her in the future. I hope that there will be new discoveries in the field of ophthalmology.
My sister had consultations with a maxillofacial surgeon and an ophthalmologist, and underwent examinations. We need time to monitor her condition and changes in her vision in order to choose the best option for her situation.
About Bookimed service
Once again, medical consultant Katerina is helping me with organising consultations, examinations and treatment. Katerina is always available and helps to resolve any issues that arise during the process. I recommend Bookimed, who will always help you find the best option for resolving your medical issues.
Mihail • Heart сheck up
United States of America
Aug 4, 2025
Verified review.
I would especially like to note your human attitude, sensitivity and patience - it is worth a lot
I would like to express my sincere gratitude to you for your professionalism, attentive attitude and care during my treatment. Thanks to your efforts and correctly selected treatment, I feel a significant improvement and confidence in my health. I would especially like to note your human attitude, sensitivity and patience - it is worth a lot. Nowadays it is not so often to meet a doctor who can not only treat, but also support you mentally. I wish you good health, prosperity and further success in your noble work. Thank you for everything you have done for me. With respect and gratitude, Mikhail Garamita
About Bookimed service
I would like to express my sincere gratitude to you for your professionalism, attentive attitude and care during my treatment. Thanks to your efforts and correctly selected treatment, I feel a significant improvement and confidence in my health. I would especially like to note your human attitude, sensitivity and patience - it is worth a lot. Nowadays it is not so often to meet a doctor who can not only treat, but also support you mentally. I wish you good health, prosperity and further success in your noble work. Thank you for everything you have done for me. With respect and gratitude, MG
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Qualifications

 

EXPERIENCE

2009 – Present, Istanbul/Turkey

MEMORIAL ŞİŞLİ HOSPITAL

Specialist in Gastroenterology

 

2003 – 2009, Istanbul/Turkey

PRIVATE YUNUS EMRE HOSPITAL

Specialist in Gastroenterology

 

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EDUCATION

1999 – 2003, Izmir/Turkey

EGE UNIVERSITY, FACULTY OF MEDICINE

Department of Gastroenterology – Fellowship in Gastroenterology

 

1998 – 1999, Istanbul/Turkey

HAYDARPAŞA NUMUNE HOSPITAL

Fellowship in Gastroenterology

 

1995 – 1998, Istanbul/Turkey

KARTAL TRAINING AND RESEARCH HOSPITAL

Department of Internal Medicine – Chief Assistant

 

1989 – 1993, Istanbul/Turkey

SSK OKMEYDANI HOSPITAL

Residency in Internal Medicine

 

1982 – 1988, Istanbul/Turkey

ISTANBUL UNIVERSITY, ISTANBUL FACULTY OF MEDICINE

Doctor of Medicine Education

 

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PROFESSIONAL MEMBERSHIPS

• Turkish Society of Gastroenterology

• Turkish Association for the Study of the Liver

• Turkish Medical Association

 

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AWARDS, HONORS, AND EXPERIENCE

• 5 international and 13 national publications

• 8 international and 41 national presentations

 

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PROFESSIONAL TRAININGS, COURSES AND CONFERENCES

• Kantonsspital Aarau, Switzerland – Summer Internship in Anesthesiology (3 months), 1985

• Kantonsspital Münsterlingen, Switzerland – Summer Internship in Internal Medicine (3 months), 1987

• Regular participation in postgraduate courses and national congresses in the field of Gastroenterology and Hepatology

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