ERISA Health Insurance Appeals: The Complete Guide
Most employer health plans are governed by ERISA, a federal law, not state insurance law. This hub explains what ERISA is, why self-funded vs fully-insured changes everything about your appeal, and the four procedural levers built into 29 CFR 2560.503-1 that can win a denial.
If you get health coverage through a private-sector employer, your appeal is almost certainly governed by ERISA, a federal law, and the rulebook is a single regulation: 29 CFR 2560.503-1. The most important early question is whether your plan is self-funded (the employer pays the claims; the carrier is only an administrator) or fully-insured (the carrier pays), because it decides whether state insurance protections apply and where you can ultimately sue. Four procedural levers are built into the federal regulation: (1) a full and fair review, (2) the right to demand every document and criterion the plan used, (3) deemed exhaustion when the plan breaks its own rules, and (4) external review by an independent organization. Your plan document and denial letter always control the exact deadlines; the federal floor for an internal appeal is at least 180 days.
Roughly half of all Americans get health coverage through an employer, and for most of them the rules that govern a denied claim are not written by their state, they are written into a single federal law: the Employee Retirement Income Security Act of 1974, universally shortened to ERISA. ERISA quietly rewires how a health-insurance appeal works: which deadlines apply, which documents you can demand, who has to review your file, and, if it ever comes to it, which court you can walk into. This guide is the map. It explains what ERISA is, the one distinction (self-funded vs fully-insured) that changes almost everything, and the four concrete levers the federal claims-procedure regulation hands to claimants. Each lever has its own deep-dive page linked below. None of this is legal advice, it is general information to help you prepare, file, and track your own appeal.
What ERISA actually is (and what it isn't)
ERISA is a 1974 federal statute that sets minimum standards for most private-sector employee benefit plans, including employer-sponsored group health plans. For appeals, the operative section is ERISA section 503, codified at 29 U.S.C. 1133, which requires every plan to give a claimant 'adequate notice in writing' of the specific reasons for a denial and 'a reasonable opportunity ... for a full and fair review' of that decision. Those two phrases, specific reasons and full and fair review, are the constitutional bedrock of every ERISA appeal.
The statute is short. The detail lives in a Department of Labor regulation, 29 CFR 2560.503-1, which spells out the deadlines, the notice contents, the document-disclosure rights, and what happens when a plan fails to follow its own procedures. When this guide points to a rule, it is almost always pointing to a subsection of that regulation.
ERISA does NOT cover every plan. Government employee plans (federal, state, and local), most church plans, and plans maintained solely to comply with workers' compensation or disability laws are exempt. Individual and ACA-marketplace coverage is not ERISA, it is regulated under state law and the Affordable Care Act. Medicare and Medicaid run on entirely separate appeal tracks. So the first thing to confirm is simply: is this an employer plan from a private, non-church employer? If yes, you are almost certainly in ERISA territory.
Self-funded vs fully-insured: the distinction that changes everything
Two employer plans can carry the exact same carrier logo on the ID card and be governed by completely different rules. The reason is who is actually paying the claims.
In a fully-insured plan, the employer buys a group policy and the insurance company bears the financial risk, if claims run high, the carrier loses money. Because a real insurance policy is being sold, state insurance law applies on top of ERISA and the ACA: state-mandated benefits, state external review, and in many states the ability to sue for bad-faith claims handling.
In a self-funded (also called self-insured) plan, the employer pays the claims out of its own funds and merely hires the carrier as a third-party administrator (TPA) to process them. No insurance policy is being sold to the employees, so ERISA preemption sweeps state insurance law aside. The federal regulation is the whole rulebook, external review runs through the federal process rather than a state program, and any lawsuit is a federal ERISA suit with remedies generally limited to the benefit itself plus attorney fees.
This is not a niche edge case. In KFF's 2024 Employer Health Benefits Survey, 63% of covered workers were in self-funded plans, rising to 79% at large firms. Most of those workers have no idea, which is exactly why 'Is my plan self-funded?' is the first spoke of this guide.
| What changes | Self-funded (ERISA) | Fully-insured (ERISA + state law + ACA) |
|---|---|---|
| Who pays claims | Employer's own funds | The insurance carrier |
| Core rulebook | 29 CFR 2560.503-1 | 29 CFR 2560.503-1 + state insurance code + 45 CFR 147.136 |
| Internal appeal floor | At least 180 days | At least 180 days |
| External review | Federal process (HHS/CMS-overseen IROs) | State external review program |
| Where you sue | Federal court, ERISA section 502(a) | Often state court |
| Bad-faith / punitive damages | Generally preempted (benefit + fees only) | Available in some states |
Your appeal rights, in one place
Under the ERISA claims-procedure regulation, once a plan issues an 'adverse benefit determination' (the legal term for a denial, reduction, termination, or refusal to pay), you are entitled to a defined set of protections. The plan document and the denial letter state the exact numbers for your plan, but the federal floor is consistent:
- At least 180 days from the date of the denial notice to file your internal appeal for a group health plan.
- A written denial that states the specific reason, the specific plan provisions relied on, and a description of the appeal procedures and time limits.
- The right, on request and free of charge, to reasonable access to and copies of all documents, records, and other information relevant to your claim, including the internal rule, guideline, or clinical criterion the plan applied.
- A review conducted by someone who was not the original decision-maker and is not that person's subordinate, and, for a medical-judgment denial, consultation with a health care professional in the appropriate specialty.
- For urgent-care claims, a fast track: notification as soon as the medical situation requires, and no later than 72 hours.
- The right to external review by an independent organization after the internal appeal is exhausted, with the reviewing organization's decision binding on the plan.
The four levers that win ERISA appeals
The regulation is procedural, and procedure is where plans slip. These four levers are the practical toolkit, each has a dedicated page below.
Lever 1, full and fair review. The regulation demands independence, specialty consultation, and a genuine re-examination. When a plan rubber-stamps its first decision, uses the same reviewer, or hides the criteria, that is a procedural defect you can raise.
Lever 2, the document and criteria demand. You have a federal right to every document, record, and internal criterion the plan used. Sending that demand in writing early is the single highest-leverage step in most ERISA appeals, because you cannot rebut a standard you have not been shown.
Lever 3, deemed exhaustion. If the plan blows its own deadlines or fails to follow the regulation, you may be deemed to have exhausted the plan's internal remedies and can proceed, meaning the plan's own procedural failure can help you.
Lever 4, external review. For most non-grandfathered plans, an independent review organization gives an outside, binding second opinion on medical-necessity and experimental/investigational denials, at no cost to you.
| Lever | Regulatory anchor | Deep dive |
|---|---|---|
| Full and fair review | 29 CFR 2560.503-1(h) | /pillar/erisa-full-and-fair-review |
| Document + criteria demand | 29 CFR 2560.503-1(h)(2)(iii) | /pillar/erisa-full-and-fair-review |
| Deemed exhaustion | 29 CFR 2560.503-1(l) | /pillar/erisa-deemed-exhaustion |
| External review | 45 CFR 147.136(d) | /pillar/erisa-external-review |
How the levers fit into a timeline
A typical ERISA path runs: denial notice arrives, you confirm whether the plan is self-funded, you send the document-and-criteria demand in writing within days, you build the appeal around whatever standard the plan produces, you file the internal appeal well inside the 180-day floor, and, if it is upheld, you request external review. If at any point the plan misses its own deadlines or ignores the procedure, the deemed-exhaustion lever may let you move forward rather than wait.
Because the clock and the exhaustion rules are unforgiving, treat the deadline on your denial letter as sacred and confirm it against your plan's Summary Plan Description. The deadline calculator can turn the date on your letter into the concrete dates that matter.
Frequently asked questions
How do I know if my health plan is governed by ERISA?
If you get coverage through a private-sector employer that is not a church, it is almost certainly an ERISA plan. Government plans (federal, state, local), church plans, and individual or ACA-marketplace coverage are not ERISA. Ask HR for your Summary Plan Description, an ERISA plan is required to give you one.
What is the single most important ERISA fact for my appeal?
Whether your plan is self-funded or fully-insured. Self-funded plans are governed almost entirely by the federal ERISA regulation, use federal external review, and are sued in federal court; fully-insured plans add state insurance protections on top. See the self-funded identification guide linked below.
How long do I have to appeal under ERISA?
The federal floor for a group health plan is at least 180 days from the date on the adverse benefit determination, under 29 CFR 2560.503-1(h). Your plan may allow more but not less. Always confirm the exact deadline on your denial letter and in your plan document, and note that urgent claims run on a faster track.
Is an ERISA appeal free?
The internal appeal and, for non-grandfathered plans, the external review are provided at no charge, and the regulation entitles you to documents free of charge. You may choose to pay for outside help preparing the appeal, but the process itself carries no fee.
Do I need a lawyer for an ERISA appeal?
For the internal appeal and external review stages, generally no, the regulation is designed for claimants to use directly. Legal help becomes more important if a case moves toward a lawsuit under ERISA section 502, which is heard in federal court on the administrative record. Apellica helps prepare and file appeals and is not a law firm.
What is an 'adverse benefit determination'?
It is the regulation's term for a denial. Under 29 CFR 2560.503-1 it includes a denial, reduction, or termination of a benefit, or a failure to provide or pay for one, and for group health plans it also covers a rescission of coverage. Every one of these triggers your appeal rights.
Does ERISA cover Medicare or Medicaid denials?
No. Medicare, Medicare Advantage, and Medicaid run on their own separate appeal systems with different deadlines and levels. ERISA governs private employer plans. If your denial is from Medicare Advantage, see the Medicare Advantage appeal guide instead.
Sources
- 29 U.S.C. 1133, ERISA section 503 (Claims procedure)
- 29 CFR 2560.503-1, ERISA claims procedure regulation (eCFR)
- 45 CFR 147.136, Internal claims and appeals and external review processes (eCFR)
- DOL EBSA, Filing a Claim for Your Health Benefits (fact sheet)
- KFF 2024 Employer Health Benefits Survey (self-funding data)
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