Patient Portal Login. Patient Portal Login. Williamsville Pediatrics 2733 Wehrle Drive, Suite 100 Williamsville, NY 14221 2733 Wehrle Drive, Suite 100 Williamsville, NY 14221. Get Directions. Phone: 716-631-3510 ... Our children's main Dr is Dr Kessler and she's absolutely amazing!!! We've seen Dr Wang a couple of times and he's amazing ....