Valerie Sprenz, MD, FAAP Top Doctor 1561 Ulster Ave Lake Katrine, New York, 12449 Phone: 18452315600 Company Name: Optum Medical Care Doctor Category: Pediatrics Profile Let this business know you found them on Hudson Valley's Online Directories. Locations Lake Katrine 1561 Ulster Ave Lake Katrine, New York 12449 Claim/Edit Listing