Two plans can have the same premium and deductible and still feel completely different to use. The difference is usually the plan type — the rules about which doctors you can see, whether you need a referral, and whether anything is covered out of network.
Key takeaways
- HMO: lowest cost, in-network only, usually needs referrals.
- PPO: most flexible, some out-of-network coverage, no referrals — but highest premiums.
- EPO: in-network only like an HMO, but usually no referrals.
- POS: a hybrid — primary care doctor and referrals, with some out-of-network coverage.
- For all types, emergency care is covered at in-network cost-sharing even at out-of-network ERs.
Side-by-side comparison
| HMO | EPO | POS | PPO | |
|---|---|---|---|---|
| Typical premium | Lowest | Low–mid | Mid | Highest |
| Out-of-network coverage | No* | No* | Yes, higher cost | Yes, higher cost |
| Primary care doctor required | Usually | Usually not | Usually | No |
| Referrals for specialists | Usually | Usually not | Usually | No |
| Best for | Budget-focused, happy with network | Want lower cost without referrals | Want a PCP plus some flexibility | Need specific out-of-network doctors or travel often |
HMO (Health Maintenance Organization)
An HMO covers care only from doctors, hospitals and other providers in its network, except in emergencies. You typically choose a primary care physician (PCP) who coordinates your care and gives referrals to specialists. In exchange for these limits, HMOs usually have the lowest premiums and simplest cost-sharing.
Choose an HMO if your doctors are in the network, you’re comfortable going through a PCP, and keeping costs down matters most.
PPO (Preferred Provider Organization)
A PPO lets you see any provider without a referral. In-network care costs less, but you also get some coverage out of network — usually with a separate, higher deductible and coinsurance. Keep in mind that out-of-network providers can bill you for the difference between their charge and what the plan pays (“balance billing”), and out-of-network spending often doesn’t count toward your in-network out-of-pocket maximum.
Choose a PPO if you want to keep a specific doctor who isn’t in other networks, see specialists without referrals, or spend a lot of time in different parts of the country.
EPO (Exclusive Provider Organization)
An EPO is a middle ground: like an HMO, there’s no coverage out of network except emergencies. Like a PPO, you usually don’t need referrals to see specialists. EPOs are common on the individual market and often priced between HMOs and PPOs.
POS (Point of Service)
A POS plan combines features of HMOs and PPOs. You usually pick a PCP and need referrals, but you can go out of network at a higher cost. POS plans are less common than the other three.
What about emergencies and surprise bills?
Under federal law, health plans must cover emergency services without prior authorization and at in-network cost-sharing, even at an out-of-network emergency room. The No Surprises Act also protects you from most surprise “balance bills” for emergency care and for certain out-of-network providers (like anesthesiologists) at in-network hospitals.
How to choose in 4 steps
- List your must-keep doctors and hospitals. Check each plan’s provider directory — and call the doctor’s office to confirm they’re in network for that specific plan.
- Think about specialists. If you see several specialists regularly, referral requirements can be a real hassle.
- Consider where you’ll be. Students away at school, frequent travelers and snowbirds may need a broader network.
- Compare total cost, not just premiums — see how deductibles and out-of-pocket maximums work.
Tip: Plan type is only half the story. Network size varies a lot — a “narrow network” PPO can still exclude major local hospitals. Always check the directory.
Related: Bronze, Silver, Gold or Platinum? · Open Enrollment 2027 dates
Example: same budget, different choices
Priya and Tom both earn similar incomes. Priya sees one primary care doctor and wants the lowest premium, so an HMO whose network includes her doctor is a natural fit. Tom has a rheumatologist he’s seen for ten years who isn’t in any local HMO network, and he travels for work. For him, paying more for a PPO is worth it — but he still checks that his specialist is in the PPO’s network, because out-of-network costs would be much higher.
Frequently asked questions
Can I switch from an HMO to a PPO mid-year?
Usually only during open enrollment or after a qualifying life event, such as moving or losing other coverage.
Does an HMO cover me when I travel?
Emergencies are covered anywhere. Routine care usually isn’t covered outside the network area, although some plans cover urgent care or telehealth while traveling. Check your plan’s rules before a long trip.
What if my doctor leaves the network mid-year?
Under federal “continuity of care” protections, if you’re in active treatment for a serious condition, pregnant, or scheduled for certain care, you may be able to keep seeing that provider at in-network rates for up to 90 days. Your plan must notify you when a provider leaves.
Do I need a referral for urgent care or mental health care in an HMO?
It depends on the plan. Many HMOs let you visit in-network urgent care, OB-GYN and some behavioral health providers without a referral. Your member handbook lists exactly what needs a referral.
Are Medicare Advantage plans HMOs or PPOs?
Most Medicare Advantage plans are HMOs or PPOs and follow similar network rules. See our Medicare at 65 checklist.
Sources: HealthCare.gov glossary; CMS No Surprises Act guidance. For education only — not insurance advice. Last reviewed October 2026.