Soonjo Hwang MD 95 Grasslands Rd Pmb#495 Maplewood Hall Wcmc Valhalla, New York, Phone: 914-493-7000 Company Name: N/A Doctor Category: Neurology and Psychiatry Profile Let this business know you found them on Westchester Magazine's Online Directories. Locations Valhalla 95 Grasslands Rd Pmb#495 Maplewood Hall Wcmc Valhalla, New York 10595-1652 Claim/Edit Listing