Our care teams at Ascension St. Mary's Hospital in Saginaw, Michigan, deliver emergency care and specialty care for your needs. COVID-19 Visitor Restrictions In Central Michigan, Ascension St. Mary's Hospital is a full-service hospital with 24/7 emergency care, a Level II Trauma Center and Comprehensive Stroke Center.For Associates‧Our Specialties‧Billing and Payment‧Michigan‧Medical Records Request.