Desert Oasis/USO Building (Main Base)

Welcome to the DHA Appointing Portal (DAP)!

This application is to be used for COVID-19 Vaccination scheduling only. If you have questions or concerns please contact your nearest Military Treatment Facility.

If this is a medical emergency please dial 911 in the U.S. or 112 in Europe..

Please note that vaccine brands, current eligible DoD Population Schema Tiers, and scheduling practices may vary by location.

You can review each of the FDA Emergency Use Authorization Fact Sheets here:

If you do not see your facility listed please refer to for more information:


Schedule your COVID-19 vaccine: USO Building, Nellis Air Force Base

The COVID vaccination site is not at Mike O'Callaghan Military Medical Center; it is located on the main base at the USO building, located near the Satellite Pharmacy.
Click HERE for Google Maps link.
Please note, you must be available to receive the 2nd dose 21 days (for Pfizer) and 28 days (for Moderna) after the 1st dose appointment.
Appointments are available Wed-Fri, 0700 - 1500. Walk-ins are welcome, but only while vaccine supplies last.

All Active Duty, Guard and Reserve personnel, GS employees, contractors (authorized to receive other vaccines in their contracts), and all TRICARE beneficiaries 12 years or older are now authorized to receive the COVID-19 vaccine.

For more information on the DoD Vaccination guidance, please visit Press NEXT button below to schedule your appointment
If you need assistance scheduling your appointment, please call the COVID Hotline 702-653-2273, opt 9, opt 1, opt 1. Hotline hours of operation are M-F 0730-1630.

If you need to cancel a previously made appointment at this facility, please go here