Accepting New Patients. Book Appointment. Share: Locations. 1. Jackson Siegelbaum Gastroenterology. 423 North 21st Street, Suite 100. Camp Hill, PA 17011. Get Directions. 717-761-0930. 2. Jackson Siegelbaum Gastroenterology. 4387 Sturbridge Drive. ... Select the correct portal here. 200 Lothrop Street Pittsburgh, PA 15213 412-647-8762 800-533-8762..