Health Services

Urgent & Emergency Care

If you are experiencing an emergency, call 911.

To reach the Emergency Department at Mike O'Callaghan Military Medical Center, call 702-653-2344. The Nellis Emergency Department cannot offer health advice over the phone.

Mike O'Callaghan Military Medical Center offers the following services:

  • Emergency Care

Emergency Care

If you are experiencing a life-threatening medical situation (including mental health emergencies), call 911 immediately or visit Mike O'Callaghan Military Medical Center if it's your nearest hospital. Emergency care services treat life-threatening medical issues such as threats to your life, limbs, sight, or safety.

Emergency services for all ages are available 24 hours a day. 

When someone develops signs and symptoms of a stroke, heart attack, or other life threatening emergency then 911 should be called, or the person should report immediately to the nearest emergency facility. If deemed medically appropriate, some patients will be taken to the nearest emergency department, instead of the Mike O'Callaghan Military Medical Center.

The Emergency Department does not give medical advice over the phone, and if a person believes there is an emergency then 911 should be called, or they should report to a nearby emergency department. VA beneficiaries may call the VA 24-hour Nurse Advice line at 877-252-4866 or the Call Center at 702-791-9024 for assistance. Non-beneficiaries will have a medical screening examination performed, and if necessary will be transferred to a civilian facility for further needed care.

After evaluation, if patients need continued inpatient care, they may be admitted. If there are specific services or specialist care needed that is unavailable at the MOMMC, then patients may be transferred to an appropriate facility for continued care.

Urgent Care

Mike O'Callaghan Military Medical Center doesn’t offer Urgent Care services. However, if you’re enrolled in TRICARE Prime at MOMMC, please call to schedule a same-day appointment with your primary care manager. If appointments aren’t available, you may visit an urgent care center in the TRICARE network.

Urgent Care treats non-life-threatening health issues that require immediate attention, such as sprains, the flu, colds, and other common illnesses.

If you’re unsure whether you need urgent care, contact the Military Health System Nurse Advice Line to speak to a registered nurse. Visit for web chat and video chat or dial 1-800-TRICARE (874-2273).

To learn about how TRICARE covers urgent care, visit the TRICARE Urgent Care page.

Urgent & Emergency Care FAQs

Contact Us



Military Health System Nurse Advice Line
1-800-TRICARE (874-2273)

Emergency Department




4700 Las Vegas Blvd. North
Building 1300, First Floor, Northeast Entrance
Nellis Air Force Base, Nevada 89191

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