TRICARE Plus is a primary care enrollment program that is offered at selected MTFs. All beneficiaries eligible for care in MTFs (except those enrolled in TRICARE Prime, a civilian HMO, or Medicare HMO) can seek enrollment for primary care under TRICARE Plus—where it is available. Non-enrollment in TRICARE Plus does not affect TFL benefits or other existing programs. You should contact your local MTF to find out if they participate in TRICARE Plus.