John F Koval, PA-C

Dr. Thomas is board certified in internal medicine (cardiovascular disease). He graduated from Cornell University and received his medical degree from Columbia University College of Physicians and Surgeons. Dr. Thomas completed his fellowship at The University of Chicago Hospitals. He practices at the Cortlandt Manor, Yorktown Heights and Putnam Valley locations.

Pulmonary medicine (pulmonology) focuses on the respiratory system, which helps you to breathe. At Optum, we are dedicated to help diagnose, treat and manage disorders affecting your lungs and other parts of the respiratory system, such as the upper airways, thoracic cavity and chest wall. With an office conveniently located in Cortlandt Manor, NY, our board-certified pulmonologists specialize in helping patients who suffer from obesity, hypertension, asthma, sleep apnea and other sleep disorders, as well as those who want to quit smoking. Optum accepts most major health plans.

CareMount Medical (formerly Mount Kisco Medical Group) is a multi-specialty practice with over 40 locations and over 500 physicians.