Gary S Tatz MD 95 Grasslands Rd Valhalla, New York, Phone: 914-493-7513 Company Name: N/A Doctor Category: Pediatric Adolescent Medicine Profile Let this business know you found them on Westchester Magazine's Online Directories. Locations Valhalla 95 Grasslands Rd Valhalla, New York 10595-1646 Claim/Edit Listing