Dr. Terushkin is a fellowship trained Mohs surgeon. He is triple board-certified in Dermatology, Dermatopathology, and Micrographic Dermatological Surgery. He is one of few Mohs surgeons in the United States to have also completed a fellowship in dermatopathology. Dr. Terushkin is the first Mohs surgeon in New York City to have treated melanoma with Mohs surgery and the MART-1 immunostain. His practice is limited to Mohs and reconstructive surgery for melanoma and non-melanoma skin cancers. He also teaches dermatology residents at Weill Cornell Medical College.

Since entering practice, Dr. Terushkin has performed over 17,000 Mohs surgeries. This includes over 1,600 melanomas treated with Mohs surgery and the MART-1 immunostain.

Dr. Terushkin graduated summa cum laude from Brandeis University with a B.S. in Neuroscience and Biology. He then attended NYU School of Medicine. While in medical school, he spent an extra year conducting research in cutaneous oncology at the Memorial Sloan-Kettering Cancer Center. He completed his internship in internal medicine at the Mount Sinai School of Medicine and his dermatology residency at NYU, where he also served as chief resident. Dr. Terushkin then completed his fellowship in Micrographic surgery and dermatologic oncology in Pittsburgh under the guidance of Dr. Zitelli and Dr. Brodland, recognized leaders in the field. He subsequently returned to NYU to complete his fellowship in dermatopathology.

Every year since 2021, Dr. Terushkin has been selected as a Castle Connolly Top Doctor. He has published over 30 peer-reviewed articles and book chapters. He is a member of the American College of Mohs Surgery, the American Academy of Dermatology, and the Dermatological Society of Greater New York. He is a peer reviewer for several professional medical journals. He is fluent in Russian and conversational in Spanish.