Yasar Colak
13
years of experience
Yasar Colak
- Specialization: Gastroenterologist
- 13 years of experience
- Speaks:English
- Online consultations: available
- Workplace: Turkey, Istanbul, Memorial Şişli Hospital
Dr. Yasar Colak is a Professor of Gastroenterology at Memorial Şişli Hospital in Istanbul. He has deep expertise in liver transplantation and therapeutic endoscopy. Dr. Colak served as an invited lecturer at the Cleveland Clinic Florida. He also worked in the Presidential Health Coordinatorate in Turkey.
- Specializes in liver transplantation and digestive tract disorders.
- Completed clinical training at the Cleveland Clinic Department of Endoscopic Applications.
- Treats patients at Memorial Şişli, the first JCI-accredited hospital in Turkey.
- Formerly served as an Associate Professor at Istanbul Civilization University.
Online consultation with Yasar Colak
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100% secure and confidential
Price on request
Excellent score
20 patient verified reviews
1 star
5%
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4 stars
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5 stars
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Patient reviews
About clinic Memorial Şişli Hospital
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Learn more about reviews.1-5 of 20 reviews
Anonymous • Basalioma
Ghana
Jun 14, 2026
The surgeon was excellent
What surprised me most about my basalioma treatment wasn't the procedure itself, but the detailed skin examination I received. The surgeon was excellent. He made sure all removal options were discussed clearly, which was reassuring since I already had my diagnosis before arriving. Right now, the treated area is healing very well. While the medical care was superb and the clinic facilities are great, the administrative staff seemed a bit disorganized, which was the only downside. Despite that, based on the surgeon’s work, it’s a place I would suggest to others.
My Bookimed coordinator was highly skilled, had the passion and patience for her work and that translated to the numerous array of options provided to me to choose from based on my budget during the entire process.She interacted with me 24/7 just for us to have solution within my schedule. All information (proforma, visa assistance, travel guidance and estimated personal expenses) for the entire treatment were on point and I encourage all manner of persons seeking medical treatment abroad to choose Bookimed as their medical tourism partner.
1. Interpreter only come when the patient calls for his services and that is only during the day. If the interpreter can also support beyond the interactions with the specialist.
2. Airport and Internal movement are left to the patient to handle which can sometimes be a major challenge for some category of patients and given the language barrier.
3. Hospital discharges are very strict even if you the patient feels he/she need additional day(s) to be fit for a return to the hotel to continue the recovery.
Anonymous • Breast Implant Revision
United Kingdom
Jun 8, 2026
The surgeon dr ozturk was fantastic, friendly, knowledgeable and inspired confidence immediately
My biggest worry was what recovery would feel like this time, especially after having my old implants for well over ten years. It turned out to be about the same as my first surgery. The surgeon dr ozturk was fantastic, friendly, knowledgable and inspired confidence immediately performing a position adjustment and implant replacement, though it's still hard to compare the final result as surgery was only 5 days ago. The hospital facility was clean and private room was great. My main issue was with the general staff support, which could have been more attentive, having said that whenever I called they attended immediately and were kind. Despite that, the medical care itself was solid, and I'm satisfied with the outcome.
Translator amazing as was Dr Ozturk, friendly, professional, knowledgeable. Co-ordination of transport, Appointments etc smooth
Hospital staff could’ve been more proactive eg not leaving things out of reach, ensuring drinks etc on hand, although having said that they immediately attended any call bells and were kind, I just didn’t want to trouble them more than I needed to.
Antonio Morales • Hair transplant
France
Jul 31, 2025
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
Anonymous • Immunotherapy with Keytruda (Pembolizumab)
Netherlands
May 31, 2026
The doctor and all the staff have been very attentive and professional, which gives me confidence that I made the right choice of clinic and treatment process
My main concern before starting treatment was how my body would react to the drug. I’m undergoing a course of Keytruda immunotherapy for kidney cancer, receiving an infusion every three weeks. Yes, I have experienced some side effects. These are mainly digestive issues, and I feel a little more tired. Of course, I am still concerned that these might get worse over time. But I must say that the doctor and all the staff have been very attentive and professional, which gives me confidence that I made the right choice of clinic and treatment process.
Donna Barber • Neck lift
Canada
Nov 6, 2025
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.
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Qualifications
Dr. Yasar Colak is a Professor of Gastroenterology at Memorial Şişli Hospital in Istanbul. He also served as an invited lecturer at the Cleveland Clinic Florida in the United States. His practice uses advanced endoscopic applications and modern treatments for digestive disorders.
Clinical Expertise and Academic Roles
Dr. Colak treats digestive system conditions. He performs advanced interventions for patients. This work uses specialized tools to treat chronic gastrointestinal diseases. He also served as the Presidential Health Coordinator between 2016 and 2019.
Professional Background
- 2022–Present — Professor of Gastroenterology — Memorial Şişli Hospital, Istanbul
- 2021–2022 — Professor of Gastroenterology — Medicana Ataşehir International Hospital
- 2018–2021 — Professor of Gastroenterology — Istanbul Civilization University
- 2013–2018 — Associate Professor — Istanbul Civilization University Gastroenterology Department
- 2016–2016 — Gastroenterology Specialist — Bezmialem Foundation Gureba Hospital
Global Training
The doctor completed training at the Cleveland Clinic Florida in the United States. He worked in the Department of Advanced Endoscopic Applications during 2015 and 2016. Later, he returned to the same department as an Invited Lecturer in 2019. In 2014, he also gained experience in the Sisli Florence Nightingale Liver Transplantation Unit.
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