Dr. Ana C Castejon-Gonzalez Dentistry Philadelphia Contact Information Dentistry and Oral Surgery. Ryan Veterinary Hospital 3900 Spruce Street Office 3115, Philadelphia, Pennsylvania 19104 http://www.vet.upenn.edu/veterinary-h... Back to Specialists Directoy Post navigationPrevious post: Dr. Sarah E BonnerNext post: Dr. Krista A. Mendoza