Hill AFB, UT 84056-5012. Get Directions. 75th Medical Group - Hill AFB Medical Facility website. 1-801-586-2273 . Clinic hours: Monday - Friday 7:30a.m. - 4:30p.m. Appointment Line Hours: Monday - Friday 7:00a.m. - 4:00p.m. Closed the 2nd Wednesday of each month for training.