Jimmy L. Koo, MD Top Doctor 3680 Hill Boulevard Town of Yorktown, New York, 10535 Phone: 19142457700 Company Name: Optum Medical Care Doctor Category: Internal Medicine Profile Let this business know you found them on Westchester Magazine's Online Directories. Locations Town of Yorktown 3680 Hill Boulevard Town of Yorktown, New York 10535 Claim/Edit Listing