Best Doctors in the World

Dr. Onur Shahin is a челюстно-лицевой surgeon and implantologist at WestDent Clinic. He performed the first zygomatic, pterygoid, and transnasal bone implant cases in Turkey. Dr. Shahin treats complex conditions like jaw cysts and medication-related osteonecrosis of the jaw. He has provided these specific implant solutions for over 100 patients.

• Published over 50 articles in national and international scientific journals.
• Expert in All-on-X protocols and bone regeneration using stem cell therapy.
• Regular speaker and cadaver course instructor for international surgical symposiums.
• Works at WestDent Clinic, an ISO 9001-certified facility in Izmir.

Dr. Gulumser Kiziltas Tokmak is a neurologist at Hisar Hospital Intercontinental in Istanbul. She holds a master’s degree in electrophysiology from Istanbul University. Dr. Tokmak specializes in brain health, treating conditions like dementia, chronic headaches, and vertigo. She works at a JCI-accredited facility known for international patient safety standards.

• Specializes in diagnostic studies including EMG, EEG, and polysomnography (PSG).
• Treats complex neurodegenerative disorders like Alzheimer’s, Parkinson’s, and multiple sclerosis.
• Manages specialized neurological therapies, including medication for essential tremors and ALS.
• Performs advanced diagnostic monitoring, such as video-EEG and electroneurography.

Dr. Ibrahim Erdim is an ENT specialist at Lokman Hekim Istanbul Hospital. He specializes in rhinoplasty, head and neck cancer surgery, and pediatric ENT. Dr. Erdim developed the Nasal Axis Lateralization Suture Technique for crooked nose correction. He works at a JCI-accredited facility that treats 10,000+ patients annually.

• Authored the Stapes Stabilizing Cartilage Graft technique for middle ear surgery.
• Published research on the effects of propolis on salivary glands after radiotherapy.
• Member of the Istanbul Association of ENT and Head & Neck Surgeons.
• Expertise includes neurotology and medical facial aesthetic procedures.

Assoc. Prof. Dr. Servet İğrek is an Orthopaedics and Traumatology specialist trained at Marmara University. He practices at Diyarbakır Selahaddin Eyyubi State Hospital and Kartal Dr. Lütfi Kırdar City Hospital.

He focuses on sports injuries and arthroscopic surgery. He has extensive experience in knee, shoulder, hip and ankle arthroscopy; ligament and meniscus surgery; shoulder instability; cartilage injuries; arthroplasty; and orthopaedic trauma.

He completed a SECEC & ESSKA‑approved Sports Surgery Fellowship Program. He has authored or co‑authored many peer‑reviewed publications, book chapters and congress presentations. He teaches in national and international arthroscopy training programs. He is an active member of the Turkish Orthopaedics and Traumatology Association, TUSYAD, the Turkish Shoulder and Elbow Surgery Association, the Hip and Knee Arthroplasty Association, and SICOT.

Dr. Toluy Ozgumus is a hematologist at Hisar Hospital Intercontinental in Istanbul. He has diagnosed and treated over 1,000 patients with bleeding and coagulation disorders. He specializes in the treatment of rare hematological cancers and bone marrow transplantation. Dr. Ozgumus works at a JCI-accredited facility recognized for excellence in hematology-oncology.

• Performs allogenic bone marrow transplants from both related and unrelated donors.
• Treats complex blood cancers including acute leukemia, multiple myeloma, and lymphomas.
• Expert in managing hematological findings related to Covid-19 infections.
• Differentiates myeloproliferative diseases from other causes of blood cell elevation.

Dr. Zinar Serhanoglu practices obstetrics, gynecology, and urogynecology. He provides prenatal care and pregnancy follow-up. He manages high-risk conditions such as preeclampsia and gestational diabetes. He performs vaginal and cesarean deliveries.

He specializes in minimally invasive surgery. He uses laparoscopy and V-NOTES for hysterectomy and for treating uterine disorders, ovarian cysts, fibroids, and ectopic pregnancy.

He treats stress urinary incontinence and pelvic organ prolapse. He provides long-term management of PCOS and endometriosis. He offers tubal ligation via laparoscopy or V-NOTES. He performs hysteroscopic treatment of uterine polyps and septum. He also provides perimenopausal and menopausal care, including bioidentical hormone therapy.

Assoc. Prof. Dr. Heves Sürmeli is a specialist in Internal Medicine and Medical Oncology. She received her medical degree (M.D.) from Eskişehir Osmangazi University in 2004. She completed her Internal Medicine residency at Kartal Dr. Lütfi Kırdar Training and Research Hospital, Istanbul (2005–2010). She then completed subspecialty training in Medical Oncology at the same hospital (2014–2017).

At the same center, she served as a Medical Oncology Specialist (2017–2023). She then worked as Administrative and Clinical Director (2023–2026). Her clinical interests include breast, lung, gynecologic, gastrointestinal, and urologic cancers.

She has published many articles in international peer‑reviewed journals. She has presented at national and international conferences. She is active in professional societies. She has received several awards.

Dr. Mustafa Temel is an ophthalmologist at Memorial Şişli Hospital in Istanbul. He has dedicated his career to eye care since starting his medical practice in 1985. Dr. Temel previously served as a specialist at GATA Training Hospital and various marine hospitals. He works at a JCI-accredited facility recognized for world-class safety standards.

• Specializes in general ophthalmology and eye health diagnostics.
• Completed specialist training at GATA Training Hospital.
• Treats international patients at one of Turkey's premier multidisciplinary centers.
• Practices at a clinic that holds ISO quality certification.

Dr. Remziye Dogan is a cardiologist at Hisar Hospital Intercontinental in Istanbul. She specializes in the diagnosis and treatment of coronary artery disease and heart failure. Dr. Dogan serves at a JCI-accredited facility that treats 500,000+ patients annually.

• Performs coronary angiography, balloon angioplasty, and stent placement.
• Expert in transesophageal echocardiography (TEE) for heart valve diseases.
• Treats arrhythmias using Holter monitoring and medical management.
• Manages complex hypertension and pulmonary hypertension cases.

Dr. Mehmet Saygi is a cardiology specialist at Hisar Hospital Intercontinental in Istanbul. He has performed over 2,500 coronary angiographies throughout his career. Dr. Saygi specializes in the diagnosis and treatment of coronary artery disease and heart failure. He works at a JCI-accredited facility that serves 500,000+ patients annually.

• Performed over 300 stent and balloon procedures.
• Expert in transesophageal echocardiography and holter monitoring for arrhythmias.
• Treats complex cardiovascular conditions including heart valve diseases and hypertension.
• Trained at Siyami Ersek Thoracic and Cardiovascular Surgery Training Hospital.

Dr. Mustafa Özdoğan heads the Medical Oncology Department at Memorial Antalya Hospital. He treats ovarian cancer, glioblastoma, and brain tumors. He holds a professorship in oncology and uses immunotherapy and targeted therapy. Dr. Özdoğan works at a JCI-accredited facility meeting international safety standards.

• Heads the oncology departments at both Memorial and Medstar Antalya hospitals.
• Authored over 40 scientific articles on cancer treatment.
• Member of the American Society of Clinical Oncology (ASCO).
• Member of the European Society for Medical Oncology (ESMO).

Dr. Sinan Çomu is a pediatric neurologist at Memorial Şişli Hospital in Istanbul. He applies American treatment methods learned during his extensive training in the USA. Dr. Çomu treats movement disorders, epilepsy, and developmental delays in children. He is a member of the Child Neurology Society.

• Specializes in pediatric neurology, genetic problems, and behavioral disorders.
• Completed a child neurology residency at the University of Pittsburgh.
• Treats neurological conditions in fetuses during high-risk pregnancies.
• Practices at JCI-accredited Memorial Şişli Hospital.

Dr. Oguzhan Babacan is a pediatric hematologist-oncologist at Hisar Hospital Intercontinental in Istanbul. He specializes in bone marrow transplantation for children with leukemia and lymphoma. Dr. Babacan has performed allogeneic, autologous, and haploidentical stem cell transplants for 13 years. He treats rare blood disorders and solid tumors in pediatric patients.

• Performs complex bone marrow transplants for leukemia and lymphoma cases.
• Treats childhood blood disorders like thalassemia, hemophilia, and aplastic anemia.
• Expertise in pediatric oncology, including neuroblastoma and Ewing's sarcoma.
• Works at Hisar Hospital, a JCI-accredited facility in Turkey.

Dr. Merve Karli is a general surgeon at Hisar Hospital Intercontinental in Istanbul. She has performed over 1,000 operations for hernias, breast diseases, and anorectal conditions. Dr. Karli trained at Eskisehir Osmangazi University and Sadi Konuk Training and Research Hospital. She holds official certifications to perform endoscopic procedures.

• Specializes in laparoscopic and open hernia repair, including umbilical and incisional cases.
• Performs gastroscopy, colonoscopy, and PEG insertion for diagnostic and therapeutic needs.
• Treats benign anorectal diseases and manages complex breast disease cases.
• Works at Hisar Hospital, a JCI-accredited facility serving 500,000+ patients annually.

Prof. Dr. Şule Karadayı is a Professor and Thoracic Surgery Specialist. She earned her MD from Ankara University in 1999 and completed her residency in 2004. Her international training includes an observership with Prof. Ramon Rami Porta in Barcelona in 2005. She received an ESTS Travel Fellowship in Vienna in 2009. She joined the Mevlana Exchange Program in Azerbaijan in 2015. She scored 76.25 on the ÜDS English exam in 2006. She is a member of the European Society of Thoracic Surgeons and several Turkish thoracic societies.

Her clinical focus includes lung cancer surgery. She performs Da Vinci robotic and VATS/minimally invasive thoracic procedures. She treats pulmonary nodules and masses. She also performs mediastinal, pleural, and chest wall (pectus) surgery. She offers interventional bronchoscopy, including endobronchial valve therapy for advanced emphysema and COPD. She serves as an assistant principal investigator on projects in wound healing and mediastinal lymph node evaluation. As of 2026, she sees patients at Hisar Hospital Intercontinental.

Dr. Leyla Elmas is a dermatology specialist at Memorial Bahçelievler Hospital in Istanbul. She was named the 2023 ASDS International Dermatology Specialist of the Year. Dr. Elmas graduated second in her medical class from Istanbul University – Cerrahpaşa. She treats a variety of skin conditions and performs diagnostic dermatological procedures.

• Completed research and observerships at Harvard, Johns Hopkins, and King’s College London.
• Received the 2024 AAD Strauss & Katz World Congress Scholarship.
• Published 10 articles in international peer-reviewed journals.
• Holds a national patent for a medical innovation.

Dr. Hasim Ustunsoy is a cardiac surgeon at Anadolu Medical Center in Istanbul. He pioneered robotic cardiac surgery using the Da Vinci system in Turkey. Dr. Ustunsoy specializes in valve repair and coronary artery bypass. He provides treatment for both adults and children with complex heart conditions.

• Former Head of the Lung Transplant Center at Gaziantep University.
• Completed fellowships at Glasgow University and Columbia University in New York.
• Served as an Associate Professor at Geneva University in Switzerland.
• Member of the International Society for Heart and Lung Transplantation.

Dr. Ali Osman Koyuncuoglu specializes in obstetrics, gynecology, and IVF at Memorial Bahçelievler Hospital. He has practiced reproductive medicine for two decades at top Turkish medical centers. Dr. Koyuncuoglu holds memberships in the American Society for Reproductive Medicine and ESHRE.

• Completed training at Brussels IVF Center and the Regionshospitalet Skive IVF in Denmark.
• Trained in robotic surgery at Acıbadem University and laparoscopic techniques at IRCAD Strasbourg.
• Maintains expertise in reproductive endocrinology through the Turkish Society of Reproductive Medicine.
• Works at JCI-accredited Memorial Bahçelievler Hospital, an eco-friendly facility in Istanbul.