List five differences between tricare extra and tricare prime insurance plans.

1. Tricare Prime is cheaper
2. Some beneficiaries pay annual enrollment fees for military retirees in Tricare Prime, but there is no annual enrollment fees for Tricare Extra
3. Tricare Extra beneficiaries can use any civilian healthcare provider payable under Tricare rules. However Tricare Prime beneficiaries can only use Military Treatment Facility.
4. Tricare Extra represents a Preferred Provider Organization (PPO), while Tricare Prime is a Health Maintenance Organization (HMO).
5. Beneficiaries (retirees) of Tricare Prime have to pay a small copayment for each visit. Beneficiaries of Tricare Extra pay a small coinsurance annually.