Ned Stephen Braunstein MD 777 Old Saw Mill River Rd Regeneron Pharmaceuticals Tarrytown, New York, Phone: 914-847-3099 Doctor Category: Internal Medicine Profile Let this business know you found them on Westchester Magazine's Online Directories. Locations Tarrytown 777 Old Saw Mill River Rd Regeneron Pharmaceuticals Tarrytown, New York 10591-6707 Claim/Edit Listing