About Us Stoneleigh Medical Group, with offices in Brewster, Jefferson Valley, Yorktown Heights, and Pawling, New York, offers comprehensive gastroenterology and primary care services.The skilled health professionals are among the region's most esteemed experts in gastroenterology and family medicine. Same-day appointments are often available.The family medicine providers at Stoneleigh Medical Group offer routine physicals and vaccinations, as well as Department... Read More about Stoneleigh Medical Group