Thomas G. Harrington, MD, FACS
Practice: Advanced Urology Centers of New York (AUCNY)
Specialty: Urology
Office locations: Smithtown, NY
Thomas Gregory Harrington, M.D., a Long Island native, graduated from St. John the Baptist Diocesan High School and received a Bachelor of Science in Biological Sciences from Binghamton University. He received a Doctorate in Medicine from New York Medical College and went on to complete an internship in General Surgery at S.U.N.Y. at Buffalo.
Thomas Gregory Harrington, M.D., a Long Island native, graduated from St. John the Baptist Diocesan High School and received a Bachelor of Science in Biological Sciences from Binghamton University. He received a Doctorate in Medicine from New York Medical College and went on to complete an internship in General Surgery at S.U.N.Y. at Buffalo.
Thomas Gregory Harrington, M.D., a Long Island native, graduated from St. John the Baptist Diocesan High School and received a Bachelor of Science in Biological Sciences from Binghamton University. He received a Doctorate in Medicine from New York Medical College and went on to complete an internship in General Surgery at S.U.N.Y. at Buffalo. Following a second year of General Surgery at S.U.N.Y. at Stony Brook, he completed his Urology residency at Stony Brook in 1997, during which time he published articles on the subjects of male infertility and urologic trauma.
Dr. Harrington is the Chairman of Urology at St Catherine of Siena Medical Center in Smithtown and has served as Director of the Department of Surgery and also as President of the Medical Staff. He is also on the attending staff at John T. Mather Memorial Hospital and St. Charles Hospital and Rehabilitation Center in Port Jefferson Station, as well as Huntington Hospital. Dr. Harrington is a Diplomate of the American Board of Urology, Fellow of the American College of Surgeons and practices Adult and Pediatric Urology in Smithtown.

Very good dr
Friendly and professional
Great doctor!
Very happy with the Dr. attention and services. Very pleasant and explicit with treatment and results
Exceptional doctor … & very thorough!
Great doctor
Dr Harrington is a wonderful physician. Long time patient. He’s so personable, caring, and thorough in my treatment. Highly recommend him for anyone in need of a Urologist.
Dr. Harrington has been my urologist for decades. His skills and and expertise are matched with his excellent patient - doctor concern and countenance. I'm blessed to have him as my physician.
Simply the best!
Great Doctor. Explained everything fully. I booked another appointment to see him in 6 months.