Mike O'Callaghan Military Medical Center is comprised of approximately 1,800 personnel who are dedicated to providing preventive, emergency and acute care services for approximately 48,000 beneficiaries. We are committed to operational readiness, outstanding customer service, and always delivering world-class health care. The Mike O’Callaghan Military Medical Center is one of the Air Force’s leading academic and medical centers of excellence. Local partnerships bring expanded opportunities for medical skill enhancement, medical research and improved care to our patients.