Choosing a health insurance plan type is one of the most consequential financial decisions you make each year — and most people do it in under 10 minutes during open enrollment. BillKarma data shows that 34% of patients chose a plan without verifying that their current doctors were in-network, leading directly to unexpected out-of-network charges. Here is a plain-English breakdown of the four main plan types and how to choose the right one.
1. Plan type overview: HMO, PPO, EPO, HDHP
Before getting into the details of each plan, here is the full comparison at a glance:
| Plan Type | Referrals Required? | Out-of-Network Coverage | Premium Level | Best For |
|---|---|---|---|---|
| HMO | Yes (from PCP) | None (except emergencies) | Lowest | People who want low costs and don’t mind staying in-network with referrals |
| PPO | No | Yes (higher cost-sharing) | Highest | People who want flexibility to see any provider without referrals |
| EPO | No | None (except emergencies) | Mid-range | People who want no referrals but are comfortable staying in-network |
| HDHP | Depends on network type | Depends on network type | Low premium, high deductible | Healthy people or HSA savers who can absorb higher upfront costs |
| POS | Yes (from PCP) | Yes (higher cost-sharing) | Mid-range | People who want PCP coordination but occasional out-of-network flexibility |
2. HMO: lowest cost, most restrictions
An HMO (Health Maintenance Organization) operates on a closed network model. You must:
- Choose a primary care physician (PCP) who manages your care
- Get a referral from your PCP before seeing a specialist
- Use in-network providers only (except genuine emergencies)
In exchange, HMOs offer the lowest premiums and copays of any plan type. If you stay within the network and use your PCP as a health coordinator, your costs are predictable and low.
The downside: The referral process takes time and can delay specialist care. If you have a complex condition requiring multiple specialists, HMO coordination can become frustrating. And if you travel frequently or live in a rural area with a thin provider network, an HMO can leave you with limited options.
HMO is a good fit if: You have a primary care doctor you trust within a large health system, you rarely need specialists, and keeping monthly costs low is your priority.
3. PPO: maximum flexibility, highest premium
A PPO (Preferred Provider Organization) is the most flexible plan type. You can:
- See any provider — in-network or out-of-network — without a referral
- Visit specialists directly without PCP approval
- Receive partial coverage for out-of-network care (typically 50–70% of the allowed amount, with the rest as your responsibility)
PPOs typically have the highest monthly premiums and the broadest provider choice. Out-of-network care is covered, but at a higher cost-sharing percentage — and you may also face balance billing from out-of-network providers who charge more than the plan’s allowed amount.
PPO is a good fit if: You see specialists regularly, you want to keep your current doctor who may not be in every network, you travel and need reliable coverage in different states, or you simply want the freedom to choose any provider without administrative hurdles.
4. EPO: no referrals, no out-of-network coverage
An EPO (Exclusive Provider Organization) is a hybrid — it combines the no-referral flexibility of a PPO with the in-network-only coverage of an HMO. You can see any in-network specialist without a referral, but out-of-network care is simply not covered except in emergencies.
EPOs typically land between HMO and PPO on price. They are growing in popularity on ACA marketplaces because they keep costs down without the referral hassle.
The EPO trap: Many patients choose an EPO thinking it works like a PPO for out-of-network emergencies. The No Surprises Act does protect you from surprise bills in genuine emergencies at out-of-network facilities, but it does not make those facilities “covered” under your EPO plan for non-emergency purposes. If you walk into an out-of-network urgent care or see an out-of-network specialist for elective care, you pay 100% of that bill yourself.
EPO is a good fit if: You are comfortable staying in-network, you do not want to deal with PCP referrals, and you are confident your preferred providers participate in the plan’s network.
5. HDHP: low premium, pairs with HSA
A High-Deductible Health Plan (HDHP) is defined by its deductible, not its network structure. To qualify as an HDHP in 2026, the plan must have:
| Coverage | Minimum Deductible (2026) | Maximum OOP (2026) | HSA Contribution Limit (2026) |
|---|---|---|---|
| Individual | $1,650 | $8,300 | $4,300 |
| Family | $3,300 | $16,600 | $8,550 |
The key benefit: HDHPs pair with a Health Savings Account (HSA). HSA contributions are pre-tax, grow tax-free, and are withdrawn tax-free for qualified medical expenses. For a person in the 22% federal tax bracket, the tax benefit alone on a $4,300 HSA contribution saves $946 per year.
HDHP + HSA math example: A standard PPO costs $350/month with a $1,500 deductible. An HDHP costs $175/month with a $3,000 deductible. Monthly premium savings: $175 × 12 = $2,100/year. Deductible gap: $1,500. Even if you hit the full deductible difference, you come out $600 ahead — and if you stay healthy and don’t hit the higher deductible, you save more.
HDHP is a good fit if: You are generally healthy and rarely use medical care, you want to build long-term tax-advantaged savings for future medical costs, or you are willing to pay more upfront when you do need care in exchange for lower monthly costs.
HDHP is a poor fit if: You have a chronic condition that requires regular, predictable care. When you know you will hit your deductible every year, the premium savings rarely outweigh the high out-of-pocket costs before insurance starts sharing.
6. POS: the hybrid option
A POS (Point of Service) plan is a hybrid of HMO and PPO. Like an HMO, you designate a PCP and need referrals to see specialists. Like a PPO, you can go out-of-network — but you pay more for it.
POS plans are less common than the other three types. They tend to appeal to people who want a primary care coordinator but occasionally need to see out-of-network providers for specific specialists. Premiums fall between HMO and PPO levels.
7. How to choose the right plan
The right plan depends on four factors:
- Check if your current doctors are in-network first. Before comparing premiums or deductibles, look up each plan’s provider directory and verify your primary care doctor, key specialists, and preferred hospital are listed. A 34% rate of patients skipping this step is the leading cause of unexpected OON bills. Use the insurer’s online directory and call the provider to confirm — directories are sometimes outdated.
- Estimate your annual care needs. If you had significant medical needs last year, assume a similar pattern. Count specialist visits, prescriptions, imaging, and planned procedures. Run the total annual cost math: (12 × premium) + expected cost-sharing for each plan you are comparing.
- Consider your risk tolerance. An HDHP saves money in healthy years but can be expensive in bad years. If a $5,000+ deductible would create financial hardship, choose a plan with a lower deductible even if the premium is higher.
- Factor in travel and where you live. If you travel frequently or split time between states, a PPO with out-of-network coverage protects you. An HMO or EPO in a rural area with a thin network can leave you without local providers.
Case study: Checking in-network status saves $3,800
Situation: Priya was switching employers and comparing two plans during open enrollment. Plan A was an EPO with a $280/month premium. Plan B was a PPO with a $420/month premium ($1,680/year more expensive).
Her research: She called her rheumatologist’s office and confirmed the specialist did not participate in Plan A’s EPO network. She sees this specialist four times per year at $650 per visit (allowed amount). On Plan A, those visits would cost $2,600 out of pocket with no coverage. On Plan B, after meeting a $1,500 deductible, the remaining three visits would be split 80/20 — costing her roughly $390 in coinsurance.
Result: The PPO cost $1,680 more in premiums but saved her $2,210 in specialist costs, for a net savings of $530. The “expensive” plan was actually cheaper. She also scanned her specialist bills and found one duplicate charge for $320 that was corrected before payment.
Frequently asked questions
What is the difference between an HMO and a PPO?
HMOs require in-network providers and PCP referrals for specialists. They offer the lowest premiums but no out-of-network coverage. PPOs allow you to see any provider without referrals and cover out-of-network care at higher cost-sharing, but charge higher premiums.
What is an EPO health plan?
An EPO covers only in-network providers (except emergencies) and does not require referrals to see specialists. It sits between an HMO and PPO in cost and flexibility. Out-of-network non-emergency care is not covered at all.
What qualifies as an HDHP in 2026?
A plan with a deductible of at least $1,650 for individuals or $3,300 for families in 2026. HDHPs can be any network type. Meeting the HDHP threshold qualifies you to open a Health Savings Account (HSA).
Can I see a specialist without a referral on an HMO?
Generally, no. HMOs require your PCP to issue a referral before you see a specialist. Without a referral, the visit may not be covered. EPO and PPO plans do not require referrals.
What happens if I go out-of-network on an EPO plan?
Out-of-network non-emergency care is not covered. You pay 100% of the bill. The No Surprises Act protects you from balance billing in genuine emergencies, but it does not extend EPO coverage to elective out-of-network care.