Which term refers to a manged care plan that traditionally requires coordination healthcare through a primary care physicain?

The term that refers to a managed care plan requiring coordination of healthcare through a primary care physician is "Health Maintenance Organization" (HMO). In an HMO, members must select a primary care physician who acts as a gatekeeper, coordinating referrals to specialists and other services to ensure efficient and cost-effective care. This structure emphasizes preventive care and typically requires members to use a network of doctors and hospitals.