Welcome to St. Mary's Medical Center. With many specialized programs, including a state-designated Regional Perinatal Intensive Care Center and Level III Neonatal Intensive Care Unit, we deliver the most babies in Palm Beach County. A leader in critical care medicine, St. Mary's treats more than 70,000 emergency and trauma patients each year.Careers‧Online Bill Pay‧Contact‧Find a Physician‧Services‧Health Professionals.