Page 5 - Best psychologists: TOP 83 doctors

Naphat Sirinimnualkul, M.D. (Dr. Ken), is a psychiatrist and clinical instructor at the Excellence Center for Sleep Disorders, King Chulalongkorn Memorial Hospital (2022–present). He previously served as a psychiatrist and clinical instructor at the General Police Hospital (Aug–Dec 2021). He completed his psychiatry residency at Chulalongkorn University (2018–2021).

Board/education: Diploma, Board of General Psychiatry, Thai General Medical Council (2018–2021). Graduate Diploma in Clinical Sciences (Psychiatry), Chulalongkorn University (2018–2021). M.D., Second Class Honors, Chulalongkorn University (2011–2017). Training: Cognitive Behavioral Therapy for Insomnia.

Expertise: sleep medicine, neuropsychiatry, consultation-liaison psychiatry, and psychopharmacology. He focuses on the interface between sleep and mood disorders.

Assoc. Prof. Dr. Saydam Mehmet is a general surgeon at Lokman Hekim Istanbul Hospital (2025–present). His work covers oncologic, endocrine, and metabolic surgery. He performs laparoscopic surgery, including hernia repair and anti-reflux procedures. He also treats morbid obesity and type 2 diabetes. Sleeve gastrectomy is among his key procedures.

Education: He graduated from the Gülhane Military Medical Academy, Faculty of Medicine (1995–2001). He completed his general surgery residency there (2004–2009). He was a research fellow at the University of Miami/Jackson Memorial Hospital, Ryder Trauma Center (2015–2016).

Experience: He worked as a general surgery specialist at GATA Haydarpaşa, Girne Military, and Mevki Military. He later served as Associate Professor of General Surgery at Dışkapı, Sancaktepe, and Medical Park Gebze. Earlier, he practiced as a general practitioner in military medical services.