Tricare Prime is a health care program designed for active duty service members, their families, and retirees in the U.S. Department of Defense system. It offers comprehensive medical coverage with a focus on preventive care, requiring members to choose a primary care manager (PCM) for their health needs. Members of Tricare Prime typically pay lower out-of-pocket costs compared to other plans, but they must receive care from network providers. Referrals from their PCM are necessary for specialist visits, ensuring coordinated care and efficient management of health services.