Mazen Taher Khalifeh MD 400 E Main St Northern Westchester Hospital Chappaqua, New York, Phone: 914-666-1200 Doctor Category: Pediatric Adolescent Medicine Profile Let this business know you found them on Westchester Magazine's Online Directories. Locations Chappaqua 400 E Main St Northern Westchester Hospital Chappaqua, New York 10549-3417 Claim/Edit Listing