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Selçuk University Faculty of Medicine, graduated in 1992.
Specialization: General Surgery — Oncology Hospital, Ankara (1998) -
Advanced training and certified programs in Turkey and abroad in the following areas:
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Transanal Endoscopic Microsurgery (TEM)
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Laparoscopic Colorectal Surgery
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Bariatric Surgery
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Robotic Surgery
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Oncologic Surgery and Hyperthermic Intraperitoneal Chemotherapy (HIPEC)
International training:
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France, Strasbourg — Laparoscopic and Robotic Colorectal Surgery
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Germany, Regensburg — Barmherzige Brüder Hospital — Cytoreductive Surgery and HIPEC
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Prof. Dr. Mustafa Uygar Kalaycı
Türkiye, Istanbul, Clinic İstanbul Cerrahi Hastanesi
General Surgery, Obesity Treatment (Bariatric Surgery)
5
Great
30+
years of experience
10+
foreign internships
40+
articles and reports
Professor of General Surgery with over 30 years of experience. One of Turkey’s leading specialists in laparoscopic and robotic surgery.
Main Areas of Expertise:
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Laparoscopic and robotic colorectal surgery
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Surgery of the stomach, esophagus, liver, bile ducts, and pancreas
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Treatment of obesity (bariatric surgery)
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Surgery of the anorectal region
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Endoscopic interventions (including ERCP)
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Surgical treatment of reflux, hernias, and oncological diseases
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Performing HIPEC — hyperthermic intraperitoneal chemotherapy
Prof. Dr. Mustafa Uygar Kalaycı graduated from Selçuk University Faculty of Medicine in 1992. He completed his mandatory service and worked as a general practitioner in the city of Bayburt and the Çumra district (Konya). He completed his specialization in general surgery in 1998 at the 3rd General Surgery Clinic of the Oncology Hospital in Ankara.
After obtaining his specialty, he fulfilled his mandatory service in the Ereğli district (Konya). Between 1999 and 2001, he worked as an assistant professor in the emergency care clinic of the Selçuk University Faculty of Medicine. Later, he worked as a senior assistant at the Bakırköy Dr. Saadi Konuk and Okmeydanı state hospitals.
In 2012, he earned the title of associate professor in general surgery at the Bakırköy Dr. Saadi Konuk Hospital, where he also served as senior assistant and administrative head of the general surgery clinic.
From 2014 to 2019, he worked as an associate professor and clinical and administrative training supervisor at the General Surgery Clinic of Kanuni Sultan Süleyman Hospital.
Since 2017, he has been a faculty member at the Health Sciences University of Turkey (SBÜ), working in the General Surgery Clinic.
EDUCATION
EXPERIENCE
- General Practitioner — Bayburt and Çumra (Konya)
- Assistant and Lecturer — Selçuk University, Emergency Care Clinic
- Senior Assistant — Bakırköy and Okmeydanı Hospitals
- Associate Professor and Supervisor — Bakırköy Dr. Saadi Konuk Hospital and SBÜ Kanuni Sultan Süleyman Hospital
- Since 2017 — Faculty Member at Health Sciences University of Turkey (SBÜ), General Surgery Clinic
PROFESSIONAL INTERESTS
- Laparoscopic and open colorectal surgery
- Anorectal surgery
- Liver, bile duct, and pancreatic surgery
- Surgery of the stomach, reflux, and hernias
- Bariatric (obesity) surgery
- Robotic surgery
- Therapeutic and interventional endoscopy (including ERCP)
- Emergency and trauma surgery
Reviews
Gökhan Akış
1 month back
Hello, I'm Gökhan. I had gastric sleeve surgery at Dr. Mustafa's four days ago. The process went so smoothly. The nurses, the assistant Emrullah, and Dr. Mustafa were incredibly attentive. I felt safe at every stage, both before and after the surgery. Thank you for your attention and sincerity. :) I wholeheartedly recommend this procedure to anyone considering gastric sleeve surgery. Don't worry. Translated fromTurkish
Amin Zalani
1 month back
Definitely recommend this doctor very prefissional kind caring before and after thr operation i had very good experience with him . Thank you so much dr.mustafa 🙏
Ahmet Al
1 month back
I met with our doctor with a diagnosis of anal fistula. I am grateful for your attention, patience, and dedicated approach. You have contributed greatly to my recovery. Thank you. Translated fromTurkish
Gizem Kocatepe
2 months back
Hello, I had gastric sleeve surgery performed by Dr. Mustafa on August 22, 2025. I'm currently hospitalized. The surgery was successful. There wasn't much post-operative pain. After meeting with Dr. Mustafa, my last fears and anxieties subsided. I'd like to thank him, his team, and the hospital staff. It was a very caring and motivating process. If you have any questions, talk to Dr. Mustafa at least once. I highly recommend it. Thank you again. Translated fromTurkish
Fahri Danis
2 months back
I had phenol treatment. I'd like to thank Mustafa and his team for everything. He's one of the most professional and expert doctors I've ever seen. The entire process was extremely professional and seamless. I had a painless, painless, and very comfortable surgery. Translated fromTurkish
Ezra Belet
3 months back
Our beloved doctor performed my mother's gallbladder surgery. His surgical expertise is undeniable, and he also understands the psychology of his patients. Thank you again to our esteemed doctor. Translated fromTurkish
Avni Gurhan
6 months back
In addition to being a very successful physician, he is also a distinguished person with a humane and friendly approach, a person beyond words "very good." I wish my doctor success and a lifetime of happiness. Translated fromTurkish
Derya Yilmaz
6 months back
I had a gastric sleeve surgery on February 5th with Dr. Mustafa. It's important to remember that a gastric sleeve surgery alone is not a success. Thanks to his support, my process is progressing very well for a successful and lasting result. First of all, I would like to thank my doctor and the team behind him. We need doctors like Dr. Mustafa. Translated fromTurkish
Buket Aktan
6 months back
My greatest luck in life was finding Mr. Mustafa. He is the only doctor I can trust blindly, not just a doctor, but also a brother. He is my friend and my friend. Translated fromTurkish
dogus can
6 months back
I met with our doctor with a diagnosis of anal fistula. No matter where you search in this field, you'll find him. I needed surgery, and we decided to have it right away. Our doctor's hands are magical; I'm so glad we met him. I'm doing very well now; I suffered for months in vain. My advice is to seek treatment without fear or delay for such complaints. Translated fromTurkish
Pinar Goymen
8 months back
I was going through a very difficult time due to fissures and hemorrhoids, which I'd been experiencing for a long time. I had my first surgery abroad, but instead of getting better, I got worse, and two months later, I found Dr. Mustafa. I wish I'd come to Dr. Mustafa from the start. He's incredibly caring, always available, and always returns the favor, even if it's by text or voicemail. I had my second surgery with him, and the process was very successful. I'm much more comfortable and healthy now. A huge thank you to Dr. Mustafa and his team! If you're looking for a reliable and successful doctor, I highly recommend him! Translated fromTurkish
Adem Okay
8 months back
I had hemorrhoidal prolapse and I had surgery with Doppler ultrasound. I used to walk crooked most of the time. It's been 20 days since the surgery and I'm back to my old self. I'm doing very well. He and his assistant Emrullah are very attentive. I don't think you should postpone it for nothing. Translated fromTurkish
Yasin Aktar
8 months back
I haven't treated Dr. Mustafa, but he's a valuable person. Besides being good at his job, he's also a kind and empathetic person. I think this is also very important. Translated fromTurkish
Aynur Kırmızıtoprak
8 months back
After extensive research, I met Dr. Mustafa. He was incredibly attentive to his patients and had a wonderful relationship. I was very scared before the surgery, and thanks to Dr. Mustafa, he helped me overcome my fear. My surgery went very well, and I was back on my feet in 10 days. I'm so glad we met. Thank you, Dr. Mustafa. Translated fromTurkish
Demet Sener
9 months back
My doctor, Mustafa Uygur, performed the thyroid surgery. All the pre- and post-operative procedures exceeded my expectations. Above all, I have great confidence in our doctor. I'm so glad we have you. Translated fromTurkish
Ahmet Bağrıaçık
9 months back
I met my doctor through the recommendation of my brother, Süleyman Bağrıaçık. He had also had a very serious hemorrhoid surgery. I had a serious hemorrhoid problem and a bilateral hernia. Within 2-3 weeks, both of my problems were gone. I sent a relative with my recommendation, and he was very grateful. Uygar, I'm so glad I have you. Translated fromTurkish
Ibrahim Aybek
9 months back
I'm so glad I met Dr. Mustafa. He performed a successful inguinal hernia surgery. Thank you, Dr. Translated fromTurkish
Celestial Celestial
9 months back
I'm so glad I crossed paths with Dr. Mustafa. After years of trying to lose weight, I sought a gastric sleeve, a solution, and after extensive research, I reached out to him. I'd like to thank him, first and foremost, and then his team, for making me feel like I was part of a truly professional team, both before and after the procedure, and for supporting me as I embarked on my new life. 🙏🏻 Translated fromTurkish
Sibel Yavuz
9 months back
I had gastric sleeve surgery at Dr. Mustafa Bey. They were very attentive before and after the surgery. Dr. Mustafa Bey and his team are wonderful, and I'm very pleased. I'm so glad I chose this doctor. Translated fromTurkish
Kadir Bozkurt
9 months back
On January 3, 2025, I went to him for an examination for an anal fissure, and he performed the surgery. He was very attentive, and thanks to him, I quickly regained my health. I definitely recommend that patients with hemorrhoids, piles, or gastrointestinal issues not delay their appointment and get examined by Dr. Mustafa without hesitation. Furthermore, you'll get answers to all your questions, even in the middle of the night. His assistant, Mr. Emrullah, is also very attentive and always attentive to his patients. I'm eternally grateful to Dr. Mustafa and his team. Translated fromTurkish
Nimet Karademir
9 months back
On November 14, 2024, my doctor Mustafa performed a gastric sleeve surgery on me. I had a wonderful time before and after the surgery, thanks to the care and warm approach of my doctor and the Istanbul Sleeve team. I would like to thank my doctor and his colleagues very much. I am so glad I embarked on this journey with Mustafa and his team. Translated fromTurkish
Aysun Gumus
9 months back
Thanks to Dr. Mustafa, I underwent my gastric sleeve surgery, which I had anxiously avoided for years, with great comfort. I consider myself fortunate to have met him. Dr. Mustafa is the best person to turn to for surgical procedures without hesitation. Translated fromTurkish
Bilcan Ozkahraman
9 months back
My dear teacher, Mustafa, is one of the best people in my life. My dear teacher, who transformed me into a new me with a successful operation. May God bless you. May your path be clear. Stay with love. Translated fromTurkish
Ahmet Returned
9 months back
I had my surgery 1 and a half weeks ago and I am very pleased. I lost 10 kilos in 1 week and had a painless process. Everything is perfect. Translated fromTurkish
Cengiz Hakan
more than a year
One of Turkey's best surgeons. Mustafa is a professor who deserves to be appreciated. I offer my respects to him. Translated fromTurkish
Celal Sevinç
more than a year
I think Mr. Mustafa is an excellent surgical operation doctor. He expertly performed a total thyroidectomy 2 days ago (there were 9 nodules and cancerous cells in my thyroid glands, and my thyroid glands had spread to the lungs), preserving the vocal cords, nerves, and parathyroids. The second day after, I sang and danced the halay. I feel vigorous. May God make him and his loved ones happy for the rest of their lives. May God bless him. Translated fromTurkish