21st Medical Group Closures Published Aug. 18, 2009 21st Medical Group PETERSON AIR FORCE BASE, Colo. -- The 21st Medical Group will be closed on Aug. 20 for the wing Change of Command from 9 a.m. to 12:30 p.m.; Aug. 26 for a wing exercise from noon-4:30; Aug. 27 from 7:30 a.m. to noon for readiness and Warfit training and Aug. 28 from 10:30 a.m. to 4:30 p.m. for a 21st MDG staff picnic. Additionally, the 21st Medical group main clinic, the Schriever clinic, the Dental clinic, and the Peterson East refill pharmacy located at the commissary will be closed Sept. 4 for an Air Force Space Command Family Day and Sept. 7 for Labor Day. The Peterson East refill pharmacy will be open Sept. 5 for normal business operations. All patients requiring medication refills and/or medical appointments are encouraged to schedule them prior to the extended weekend. For all medical emergencies please call 911 or go to the nearest emergency room. When requiring after hours Acute Care please contact the 556-CARE line and choose the USAFA Acute Care clinic.