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NewYork-Presbyterian Medical Group Westchester, located at 540 Gramatan Ave in Mount Vernon, New York, is dedicated to bringing world-class care to the Westchester community. Our team of doctors-including leading experts from ColumbiaDoctors-offer high-quality outpatient services, including primary care, OB/GYN and endocrinology services and more. Make an appointment with us today.

Nicholas Tsamparlis, MD Dr. Nicholas Tsamparlis is a board certified Internist practicing at NewYork-Presbyterian Medical Group Westchester located in Mt. Vernon, NY. He graduated from University De Guadalajara Faculty Medicine and has been practicing since 1993. Dr...

Joshua L. Hartman, MD, is a gastroenterologist at NewYork-Presbyterian Medical Group Westchester and an assistant professor of medicine at Columbia University Medical Center. He performs surgeries at NewYork-Presbyterian Lawrence Hospital. Dr. Hartman see patients for general gastroenterology conditions as well as liver disease. He earned his medical degree from New York Medical College. He served his internship and residency at Icahn School of Medicine at Mount Sinai Hospital and his gastroenterology fellowship at Northwell Health. He is a frequent lecturer and has published research in various medical journals. Dr. Hartman is a member of the American College of Gastroenterology and the New York Society for Gastrointestinal Endoscopy.