The H2U HealthCenter at St. David's Medical Center is a convenient care center dedicated to providing quality healthcare services to St. David's HealthCare employees and their dependents and to member employers. Discover More Get Directions Call Us: (512) 544-0278. Location Hours. Mon, Wed and Fri: 8 a.m.-5 p.m. Tue and Thu: 7 a.m.-4 p.m..