Ambulatory Medical Practices MSO, Inc is a management services organization that provides administrative and clinical support staff for ColumbiaDoctors Medical Group and ColumbiaDoctors of the Hudson Valley.  ColumbiaDoctors is one of the largest multi-specialty practices in New York State, comprised of an experienced group of physicians specializing in Cardiology, Vascular Disease, Internal Medicine, Obesity, Podiatry, Gastroenterology and Endocrinology.  Our group consists of over 50 physicians treating patients throughout Westchester, Rockland and Orange Counties.  Our locations include Valhalla, Hawthorne, White Plains, Scarsdale, Yonkers, Suffern and Monroe.