A rehab program can look perfect and still be one your plan pays nothing for. Plan type is usually why. HMOs and EPOs generally pay only for in-network care. PPOs pay part of out-of-network care, at a higher cost. Check this before anyone gets attached to a program.
How do PPO, HMO, EPO and POS plans differ for rehab?
Marketplace plans can be any of these types,1 and job-based plans may be too. You’ll find the type on the insurance card or in the plan’s Summary of Benefits and Coverage, a short standard summary you can ask the plan for.17
| Plan type | Out-of-network treatment | Referral needed? |
|---|---|---|
| HMO | Generally not covered, except emergencies. May require living or working in its service area1 | Often, from a primary care doctor2 |
| EPO | Not covered, except emergencies1 | Ask the plan |
| POS | You pay less in network, more outside it1 | Yes, to see a specialist1 |
| PPO | Covered, at an additional cost1 | No1 |
Medicaid, Medicare, TRICARE and VA coverage work differently and have their own rules. See Medicaid, Medicare or veterans and military families.
HMOs and EPOs
With these plans the network decides almost everything, so confirm the program is in network for the level of care your loved one needs before you go further. With an HMO, get any required referral before admission or the plan may not pay.2
If no in-network program fits, ask the plan in writing for an exception. Under federal parity rules, a plan’s network standards for addiction treatment generally can’t be more restrictive than for medical care.4 If it says no, you can appeal and file a parity complaint.
PPOs
A PPO pays part of out-of-network care, but the gap can be large. Out-of-network spending generally doesn’t count toward your out-of-pocket limit, and neither do charges above what the plan allows.16 Ask whether there’s a separate out-of-network deductible, and read why network status changes the bill so much.
Is the plan through work insured or self-funded?
HR or the plan administrator can tell you. It matters because different rules and regulators apply.4
With an insured plan, the employer buys coverage from an insurance company and your state insurance department regulates it. Some states have parity laws that go further than federal law.4 With a self-funded plan, the employer pays claims itself, often hiring an outside administrator to process claims and provide a network.6 A private employer’s self-funded plan answers to the U.S. Department of Labor, so ask whether a state rule applies at all. A state or local government plan answers to HHS.4
Required benefits differ too. Small-group insurance plans that aren’t grandfathered must cover substance use treatment. Self-insured and large-employer plans don’t have to cover the full list of essential health benefits, though many self-insured plans do.45
Do Marketplace plans cover rehab?
Yes. Substance use disorder treatment is an essential health benefit, and these plans can’t put yearly or lifetime dollar limits on it or refuse coverage for a pre-existing condition.7 Before choosing one, check whether the programs you’re considering are in its network.
Open Enrollment for 2027 coverage on HealthCare.gov runs November 1, 2026, to January 15, 2027. Enroll by December 15 for coverage that starts January 1.18 State-run marketplaces may set other dates. Outside that window you need a Special Enrollment Period, such as losing other coverage in the past 60 days.8
What if your loved one loses their job or turns 26?
Losing job-based coverage
COBRA lets them keep the same plan, network included, usually for up to 18 months after a job loss.12 They pay the full premium, including the employer’s share, plus a small fee.10 They have at least 60 days to elect it, and once they elect and pay, coverage reaches back to the day the job coverage ended.11 COBRA generally doesn’t apply to employers with fewer than 20 employees.13
Within those 60 days they can choose a Marketplace plan instead, which may cost less, or enroll in Medicaid at any time if eligible.9 One trap: dropping COBRA early on purpose doesn’t by itself qualify them for a Marketplace Special Enrollment Period.9
Young adults on a parent’s plan
Your son or daughter can usually stay on your plan until 26. On a job-based plan that holds even if they’re married, live elsewhere or aren’t your tax dependent.14 The plan type goes with them, though, so a local HMO may not cover programs where they live.1
Jordan, 24, is on his mother’s HMO. A residential program in another state says it “works with your insurance,” but the plan summary shows no out-of-network coverage. The plan gives his mother a list of in-network residential programs and says his primary care doctor must send a referral. He starts at one two hours from home.
Do short-term health plans cover rehab?
Not necessarily. Federal rules don’t count short-term plans as regular individual health insurance, so the essential health benefit rules, including substance use coverage, don’t apply.415 Federal surprise-billing protections generally don’t either.3 Read the exclusions, ask in writing what the plan pays for, and compare it with a Marketplace plan or Medicaid.
What should we ask the plan?
Questions about your plan type
Frequently asked questions
Does plan type change how many days of treatment are approved?
Not directly. Approvals come from medical-necessity and prior authorization rules, which parity says generally can’t be stricter for addiction treatment than for medical care.4 Being in network doesn’t mean every day will be approved. Learn why plans approve care a few days at a time.
Who can help us if the plan won't answer?
For a private employer plan, Department of Labor benefits advisors take questions at 1-866-444-3272.4 Your state insurance department handles insured plans.
Sources
- HealthCare.gov — Health insurance plan & network types: HMOs, PPOs, and more. healthcare.gov/choose-a-plan/plan-types/ — accessed Oct 2026
- HealthCare.gov — Referral (glossary). healthcare.gov/glossary/referral/ — accessed Oct 2026
- Centers for Medicare & Medicaid Services — Know your rights with insurance (No Surprises Act). cms.gov/initiatives/your-patient-rights/medical-bill-rights/know-your-… — accessed Oct 2026
- Centers for Medicare & Medicaid Services — The Mental Health Parity and Addiction Equity Act (MHPAEA). cms.gov/marketplace/private-health-insurance/mental-health-parity-addi… — accessed Oct 2026
- HealthCare.gov — What Marketplace health insurance plans cover. healthcare.gov/coverage/what-marketplace-plans-cover/ — accessed Oct 2026
- HealthCare.gov — Self-insured plan (glossary). healthcare.gov/glossary/self-insured-plan/ — accessed Oct 2026
- HealthCare.gov — Mental health and substance abuse health coverage options. healthcare.gov/coverage/mental-health-substance-abuse-coverage/ — accessed Oct 2026
- HealthCare.gov — Getting health coverage outside Open Enrollment (Special Enrollment Periods). healthcare.gov/coverage-outside-open-enrollment/special-enrollment-per… — accessed Oct 2026
- HealthCare.gov — COBRA coverage when you're unemployed. healthcare.gov/unemployed/cobra-coverage/ — accessed Oct 2026
- HealthCare.gov — COBRA (glossary). healthcare.gov/glossary/cobra/ — accessed Oct 2026
- Code of Federal Regulations — 26 CFR 54.4980B-6, Electing COBRA continuation coverage. ecfr.gov/current/title-26/section-54.4980B-6 — accessed Oct 2026
- Code of Federal Regulations — 26 CFR 54.4980B-7, Duration of COBRA continuation coverage. ecfr.gov/current/title-26/section-54.4980B-7 — accessed Oct 2026
- Code of Federal Regulations — 26 CFR 54.4980B-2, Plans that must comply (small-employer plan exception). ecfr.gov/current/title-26/section-54.4980B-2 — accessed Oct 2026
- HealthCare.gov — Health insurance coverage for children and young adults under 26. healthcare.gov/young-adults/children-under-26/ — accessed Oct 2026
- Code of Federal Regulations — 45 CFR 144.103, Definitions (individual health insurance coverage; short-term, limited-duration insurance). ecfr.gov/current/title-45/section-144.103 — accessed Oct 2026
- HealthCare.gov — Out-of-pocket maximum/limit (glossary). healthcare.gov/glossary/out-of-pocket-maximum-limit/ — accessed Oct 2026
- HealthCare.gov — Summary of Benefits and Coverage (glossary). healthcare.gov/glossary/summary-of-benefits-and-coverage/ — accessed Oct 2026
- HealthCare.gov — When can you get health insurance? (Open Enrollment dates and deadlines). healthcare.gov/quick-guide/dates-and-deadlines/ — accessed Oct 2026