UnitedHealthcare has four Medicare Advantage plan types. Network requirements, referral rules and cost-sharing differ across all four. How often you see specialists and whether you're comfortable with a network requirement determines which type fits you.
- HMO (Health Maintenance Organization): You must use doctors and hospitals within the plan's network, except for emergencies. You'll need to choose a primary care physician who coordinates your care and provides referrals to specialists.
- HMO-POS (HMO with Point-of-Service): This plan works like a standard HMO but allows you to see out-of-network providers for some services at a higher cost. You still need a primary care physician and referrals for in-network specialist care.
- PPO (Preferred Provider Organization): You can see any doctor or specialist without a referral, both in-network and out-of-network. Out-of-network care costs more. You aren't locked into a network the way HMO members are.
- PFFS (Private Fee-for-Service): You can see any Medicare-approved doctor or hospital that accepts the plan's payment terms and you don't need referrals.





