How do i contact st marys medical center? Phone Directory St. Mary's Medical Center Main Line - 816-228-5900 Breast Center - 816-655-5767 Business Office - 816-943-2192How do i contact st marys regional medical center enid? St. Mary's Regional Medical Center. 305 South 5th Street. Enid, Oklahoma 73701. Main Hospital Phone: 580-233-6100. Physician Referral Service Phone: 580-249-3741.How do i register for services at st marys? For emergencies, please go directly to St. Mary's Emergency Center. All patients should register in the main area, located beside the atrium lobby. We encourage all patients, including expectant mothers, to pre-register for services to allow for a quicker check-in process.Where is the st marys business office located? The St. Mary’s Business Office (PFS) is located on 3-West and can be reached by phone at 304.526.1014 or by email [email protected].