About
Dr. Costas Hanjis is a board-certified internist with more than 20 years of experience in New York City. He trained at New York Medical College and holds active certification from the American Board of Internal Medicine since 2007. Before joining MD², he served as an Attending Physician at Weill Cornell Medical Associates and New York-Presbyterian/Weill Cornell Medical Center. He also holds an appointment as Clinical Assistant Professor of Medicine at Weill Cornell Medical College, where he mentored medical students and residents and earned a Teaching Award for his contributions to academic medicine.
Dr. Hanjis focuses on preventive health, chronic disease management, and longitudinal care. " He brings particular expertise to cancer survivor care, guiding patients through medical and lifestyle needs with precision and care. He believes deep knowledge of each patient supports a holistic, lifestyle-focused approach to health. A lifelong New Yorker, he is an avid Knicks fan who plays guitar and travels with his family to Greece and Slovenia to reconnect with his heritage.
Education & Training
Medical School
New York Medical College
Additional Training
Clinical Assistant Professor of Medicine, Weill Cornell Medical College
Certifications
Conditions Treated
Who is Dr. Hanjis right for?
Dr. Hanjis is a strong fit for adults seeking a longitudinal relationship with an experienced internist. Patients managing chronic conditions or navigating life after a cancer diagnosis benefit from his precise, lifestyle-focused approach. He works well with patients who want a physician deeply invested in their long-term wellness. His decades of New York City practice give him particular insight into the needs of urban professionals and families.
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Frequently Asked Questions
Dr. Hanjis treats a wide range of internal medicine conditions, with a focus on chronic disease management and preventive health. He brings particular expertise to cancer survivor care. He also manages cardiovascular risk, metabolic conditions, and other concerns that benefit from long-term, relationship-driven care.
Yes. Dr. Hanjis holds active board certification in Internal Medicine from the American Board of Internal Medicine. He has maintained that certification since 2007.
Dr. Hanjis trained at New York Medical College. He later joined the faculty at Weill Cornell Medical College as a Clinical Assistant Professor of Medicine, where he earned a Teaching Award for his work mentoring students and residents.
Before joining MD², Dr. Hanjis served as an Attending Physician at both Weill Cornell Medical Associates and New York-Presbyterian/Weill Cornell Medical Center. He spent over two decades practicing internal medicine in New York City.
Dr. Hanjis builds holistic, lifestyle-focused care plans grounded in deep knowledge of each patient. He emphasizes preventive health and takes a longitudinal view of patient well-being. He tailors his approach to each patient's goals, values, and long-term health needs.
Yes. Dr. Hanjis brings particular expertise to cancer survivor care. He guides patients through the medical and lifestyle needs that follow a cancer diagnosis, helping them navigate long-term wellness with precision and attention to detail.
Dr. Hanjis has more than 20 years of internal medicine experience in New York City. He has practiced at leading academic medical centers and held a faculty appointment at Weill Cornell Medical College throughout his career.
Doctor profile last updated March 21, 2026