Attention TRICARE beneficiaries!  
You may experience busy signals when calling the military pharmacy prescription refill interactive voice response system – or prescription refill line – Jan. 26 to Feb. 5, 2026, as the system is updated.  
Each military pharmacy’s prescription refill line may be unavailable for about two hours. If you call the prescription refill line at this time, you will hear a busy signal. Please wait and call back to complete your refill later.  
You may still use the MHS GENESIS Patient Portal to refill your prescriptions.  
You may report issues to the DHA Global Service Center by calling 800-600-9332.
Mike O’Callaghan Military Medical Center earns an ‘A’ Safety Grade
Mike O’Callaghan Military Medical Center has received an “A” Leapfrog Hospital Safety Grade for Fall 2025, demonstrating a commitment to providing high-quality care to all patients.
Our Mission. Your [quality] Care.
Mike O'Callaghan Military Medical Center is committed to providing all of our patients with high-quality care.
Level III Trauma Center
Our level III trauma center is the first Air Force medical facility to treat civilian critical care and trauma patients arriving by ambulance.
Learn more
Connect with us on Facebook
Want another way to connect with your Military Treatment Facility? Connect with us on Facebook! We welcome you to join our social community where we share important information and updates.
Quality and Safety
Make an Appointment
Connect with a Patient Advocate Do you have a suggestion, concern, complaint or compliment? Contact Us Now

Mike O'Callaghan Military Medical Center News and Updates

News
U.S. Air Force Senior Airman Jaiveion Turner, left, a health services management journeyman, is evaluated by Staff Sgt. Abey Lewis, right, an aerospace medical technician, both assigned to the 99th Medical Group (MDG), on his needle decompression skills during the 2025 Diamondback Medic Rodeo at Nellis Air Force Base, Nevada, Dec. 9, 2025.

Nellis Medics Take the Reins, Host First Medic Rodeo

News
Photo of MOMMC Emergency room with display of A hospital safety grade

Mike O’Callaghan Military Medical Center earns an ‘A’ Safety Grade in National Assessment

News
Paramedic Staff Sgt. Kenneth McIntyre sits inside an ambulance at Mike O'Callaghan Military Medical Center

A Breath of Relief: How One Airman's Training Saved a Life

News
The Joint Commission Gold Seal of Approval

Mike O’Callaghan Military Medical Center awarded The Joint Commission’s Gold Seal of Approval

More

TRICARE News and Updates

News
Man holds white pills in his hand while he leans over a white countertop

Pharmacy copayments waived for TRICARE Prime Remote enrollees in the US beginning Feb. 28, 2026

News
A man and woman standing on a beach

Retirement changes your TRICARE coverage: Learn what to do if you’re retiring in 2026

News
Smiling woman sits at a table while holding her glasses.

What are my 2026 TRICARE For Life costs?

News
Icons of blue and yellow hands interlocked. Text reads: "Your Safety. Your Comfort. Your Choice." DHA logo and TRICARE logo.

Your safety, your comfort, your choice: Requesting chaperones at military hospitals and clinics

More
DOD Safe Helpline
Links to 988 Suicide & Crisis Lifeline
DOD Sexual Assault Prevention and Response Office
Don't forget to keep your family's information updated in DEERS!