Quick answer: an HMO keeps you in its network and usually requires a primary care doctor and referrals; it tends to have the lowest premiums. A PPO lets you see specialists without referrals and pays for some out-of-network care, at a higher premium. An EPO is in between: no referrals, but generally no coverage outside the network except emergencies. A POS plan combines an HMO-style primary care doctor and referrals with some out-of-network coverage. Pick the type that keeps your current doctors in network at a total cost you can afford.
Plan type is one of the first labels you see when you shop for health insurance, and one of the least explained. The letters describe network rules: which doctors and hospitals you can use, whether you need permission to see a specialist, and what happens if you go outside the network.
Those rules can matter more than the premium. A cheap plan that does not include your doctors, or that requires referrals you find hard to get, can cost more in time and money than a pricier plan that fits. This guide explains each type, compares them side by side and gives a simple method for choosing. It is part of our complete health insurance guide, which covers costs, enrollment and your rights as a policyholder.
Definitions follow HealthCare.gov’s plan type guidance and glossary, checked October 2026. Individual plans vary, and the same label can mean slightly different rules from one insurer to another, so always read the plan’s Summary of Benefits and Coverage. This is general information, not insurance advice.
Why Plan Type Matters
Every health plan has a network: the doctors, hospitals, labs and pharmacies that have contracts with the insurer. In-network providers agree to accept the plan’s negotiated rates, which keeps your costs lower and protects you from being billed for the difference.
Plan type sets three rules around that network:
- Do you need a primary care doctor? Some types ask you to pick one who coordinates your care.
- Do you need referrals? Some types require your primary care doctor’s referral before the plan pays for a specialist.
- Is out-of-network care covered? Some types pay part of the bill when you see a provider outside the network; others pay nothing except in emergencies.
Cost terms such as deductibles and coinsurance work the same way across all types. If those terms are new to you, start with our explainer on deductibles, copays, coinsurance and the out-of-pocket maximum.
HMO: Health Maintenance Organization
HealthCare.gov describes an HMO as a type of plan that usually limits coverage to care from doctors who work for or contract with the HMO, and generally will not cover out-of-network care except in an emergency. An HMO may also require you to live or work in its service area.
How it works day to day
- You choose a primary care doctor, sometimes called a PCP, from the network.
- Your PCP handles routine care and refers you to specialists when needed.
- Without a referral, the plan may not pay for a specialist visit.
- Care outside the network is generally not covered unless it is an emergency.
Who it suits
HMOs often have lower premiums and lower out-of-pocket costs than PPOs. They work well for people whose doctors are already in the network, who like having one doctor coordinate their care, and who mostly get care close to home.
Watch-outs
Referral rules add a step before specialist care. If you travel often, have children away at college or see specialists at a medical center outside the network, an HMO can be frustrating or expensive. Ask how the plan handles care when you are temporarily out of the service area.
PPO: Preferred Provider Organization
According to HealthCare.gov, a PPO is a plan where you pay less if you use providers in the plan’s network, and you can use doctors, hospitals and providers outside the network without a referral for an additional cost.
How it works day to day
- You usually do not need a primary care doctor.
- You can book specialists directly, without referrals.
- In-network care costs the least.
- Out-of-network care is covered, but you pay a larger share and may face a separate, higher deductible and out-of-pocket limit.
The balance billing catch
Out-of-network providers have not agreed to the plan’s rates. Outside the situations protected by federal surprise billing law, they can bill you for the difference between their charge and what the plan pays. A PPO’s out-of-network coverage reduces your bill, but it does not always cap it.
Who it suits
PPOs suit people who want flexibility: those who see several specialists, want access to a specific out-of-network provider, travel frequently or have family members in different parts of the country. The trade-off is usually higher premiums.
EPO: Exclusive Provider Organization
HealthCare.gov defines an EPO as a managed care plan where services are covered only if you use doctors, specialists or hospitals in the plan’s network, except in an emergency.
How it works day to day
- Many EPOs do not require a primary care doctor or referrals.
- You can see in-network specialists directly.
- Out-of-network care is generally not covered except emergencies.
Who it suits
EPOs appeal to people who want to skip referrals but are comfortable staying inside one network. Premiums often fall between HMOs and PPOs. Because there is no out-of-network safety net, confirming that your doctors and preferred hospital are in network is especially important.
POS: Point of Service
HealthCare.gov describes a POS plan as one where you pay less if you use doctors, hospitals and other providers in the plan’s network, and where you usually need a referral from your primary care doctor to see a specialist.
How it works day to day
- You choose a primary care doctor who coordinates care.
- Referrals are usually required for specialists.
- Out-of-network care is covered at a higher cost, often only with a referral.
Who it suits
POS plans fit people who like the coordinated, lower-cost structure of an HMO but want some protection if they need an out-of-network specialist. They are less common than the other three types in many markets.
Side-by-Side Comparison
| Feature | HMO | PPO | EPO | POS |
|---|---|---|---|---|
| Primary care doctor required | Usually | Usually not | Often not | Usually |
| Referrals for specialists | Usually | No | Usually not | Usually |
| Out-of-network coverage (non-emergency) | Generally none | Yes, higher cost | Generally none | Yes, higher cost |
| Typical premium level | Lower | Higher | Middle | Middle |
| Best for | Budget, local care, coordinated care | Flexibility and broad access | No referrals, one network | Coordinated care with an out-of-network option |
The premium column describes common patterns, not rules. Prices depend on your area, insurer, metal tier and, for job-based plans, how much your employer contributes. Compare actual quotes.
Where High-Deductible Plans Fit
A high-deductible health plan (HDHP) is not a separate network type. It describes the deductible. An HDHP can be built as an HMO, PPO, EPO or POS.
HSA eligibility
An HDHP that meets IRS rules lets you open a health savings account. For 2027, IRS Revenue Procedure 2026-24 sets the minimum deductible at $1,750 for self-only coverage and $3,500 for family coverage, and the maximum out-of-pocket at $8,700 and $17,400. HSA contribution limits for 2027 are $4,500 for self-only and $9,000 for family coverage.
Choosing an HDHP
When you compare an HDHP to a traditional plan, look at the network type as well as the deductible. A high-deductible PPO and a high-deductible HMO behave very differently when you need a specialist.
Emergencies, Surprise Bills and Other Protections
Some protections apply no matter which plan type you choose.
Emergency care
Under the Affordable Care Act and the federal No Surprises Act, most plans must cover emergency services without prior approval and cannot charge more for emergency care at an out-of-network hospital than they would in network. That applies to HMOs and EPOs as well as PPOs.
Surprise bills at in-network facilities
The No Surprises Act also protects you from surprise bills for certain non-emergency care from out-of-network providers at in-network hospitals and surgery centers, such as anesthesiologists, radiologists and assistant surgeons you did not choose. In those cases you generally pay only in-network cost-sharing.
Preventive care
ACA-compliant plans must cover many preventive services without cost-sharing when you use an in-network provider. In an HMO or EPO, that means your annual checkup and recommended screenings are covered only within the network.
Two plans at once
If you are covered by two plans, such as your own job plan and a spouse’s, coordination of benefits rules decide which pays first, and each plan’s network rules apply to its share. Our article on having two health insurance policies explains how that works.
How to Choose the Right Plan Type
A methodical comparison takes less than an hour.
Step 1: List your must-keep providers
Write down your primary care doctor, specialists, preferred hospital, any therapist, and your pharmacy. If keeping a specific doctor is essential, network status will decide your plan type for you.
Step 2: Check networks for each plan
Use each insurer’s provider directory, then call the offices to confirm they will be in network for the exact plan name next year. Directories are not always current.
Step 3: Think about referrals honestly
If you see a specialist regularly, ask whether an HMO or POS plan would need a new referral each time or allow a standing referral. If referrals would be a burden, a PPO or EPO may be worth a higher premium.
Step 4: Consider where you get care
People who split time between two places, travel for work or have dependents living elsewhere often need out-of-network coverage or a large national network, which points toward a PPO.
Step 5: Compare total yearly cost
For each plan, add 12 months of premiums to the out-of-pocket maximum to see your worst-case cost. Then estimate a typical year using the copays for your expected visits and prescriptions. The cheapest premium is not always the cheapest plan.
Step 6: Match the timing
Marketplace plans can be changed during open enrollment or after a qualifying life event. Our article on open enrollment and Special Enrollment Periods lists the dates for 2027 coverage and the events that qualify. Employer plans follow your employer’s enrollment calendar; if you are changing jobs, our guide on how health insurance works when switching jobs explains the transition.
A Note on Medicare Plans
Medicare Advantage plans also come as HMOs, PPOs and other types, with similar network rules. Original Medicare has no network and lets you see any provider in the country who accepts Medicare. If you or a parent are approaching 65, our comparison of Medicare Advantage vs Medigap explains how plan type affects that decision.
Quick Scenarios
These examples show how the rules play out, without assuming any particular prices.
- A healthy single adult with a local doctor in network. An HMO or EPO often offers the lowest total cost.
- A family with a child who sees a specialist at an out-of-network children’s hospital. A PPO with out-of-network benefits, or a plan that includes that hospital, may be worth the higher premium.
- A worker who wants to fund an HSA. Look at HSA-eligible HDHPs and compare their network types side by side.
- Someone who travels for months at a time. A PPO with a national network usually works better than a regional HMO.
Frequently Asked Questions
What is the main difference between an HMO and a PPO?
An HMO usually requires you to use its network and get referrals for specialists, and generally does not cover out-of-network care except emergencies. A PPO lets you see specialists without referrals and covers some out-of-network care at a higher cost, usually for a higher premium.
Is an EPO better than an HMO?
Neither is better for everyone. EPOs usually skip referrals, which some people prefer, but like HMOs they generally do not cover out-of-network care except emergencies. Compare networks and prices for your area.
Do HMOs cover emergencies out of network?
Yes. Most plans, including HMOs and EPOs, must cover emergency services at out-of-network hospitals without prior approval and at in-network cost-sharing.
Can a high-deductible plan be an HMO?
Yes. A high-deductible health plan describes the deductible, not the network. HDHPs can be structured as HMOs, PPOs, EPOs or POS plans, and those that meet IRS rules qualify you for an HSA.
Which plan type is cheapest?
HMOs often have the lowest premiums and PPOs the highest, but total cost depends on your care, network and out-of-pocket limits. Compare premium plus out-of-pocket maximum for each plan.
Sources
- HealthCare.gov, Health insurance plan and network types: HMOs, PPOs and more; glossary entries for HMO, PPO, EPO and POS plans.
- CMS, No Surprises Act consumer protections.
- IRS Revenue Procedure 2026-24 (2027 HSA and HDHP limits).
