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99th Medical Group - Mike O'Callaghan Federal Medical Center

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4700 North Las Vegas Blvd
Nellis AFB, NV 89191-6601

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99th Medical Group - Mike O'Callaghan Military Medical Center website

1-702-653-CARE (2273)

Doors to the facility are 6:00 a.m. - 8:00 p.m. Clinic operations are 7:00 a.m. - 4:30 p.m. Emergency Room is available 24 hours 7 days a week

The 99th Medical Group—also known as the Mike O'Callaghan Medical Center—is comprised of approximately 1400 personnel who are dedicated to providing preventive, emergency and acute care services for approximately 22,000 active-duty members and their dependents. Health care services are also provided directly or coordinated for over 40,000 retirees, their dependents or other eligible beneficiaries on a space-available basis.

We are committed to operational readiness, outstanding customer service, and always delivering world-class health care.  

  • You can see for yourself how well we are doing. 
  • Click on one of the links to learn how we measure our performance.


  • One measure is not an indication of a facility's quality. Sometimes a smaller population can make a measure move pretty drastically from quarter to quarter, so don't be alarmed if you see a dip or a spike.
  • If there is no data included with the description of the measures below, it may be because your facility doesn't offer that particular service or treatment.
  • If you have questions, please contact the Patient Administration office at your military treatment facility or a beneficiary counseling and assistance coordinator

Download Spreadsheet of Metrics New MTF Search


DHA Address: 7700 Arlington Boulevard | Suite 5101 | Falls Church, VA | 22042-5101

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