Outpatient services, including the Main & Satellite Pharmacies and Laboratory will be closed on Friday, June 19, 2026 for Juneteenth.

Inpatient operations and the Emergency Department remain open 24/7/365.

The MHS Nurse Advice Line is also available 24/7 to TRICARE beneficiaries for health-related questions and guidance. You can reach the Nurse Advice Line by calling 800-TRICARE (874-2273) or visiting MHSNurseAdviceLine.com

About Us

Image of Nellis Air Force Base

About Us

Mission: Forge ready forces
Vision: DOD's most revered operational, readiness, and training platform...delivering trusted care worldwide

Mike O'Callaghan Military Medical Center is comprised of approximately 1,400 personnel who are dedicated to providing preventive, emergency and acute care services for approximately 22,000 active duty personnel and their dependents.

Health care services are also provided directly or coordinated for more 40,000 retirees and other eligible beneficiaries on a space-available basis.


 
Don't forget to keep your family's information updated in DEERS