Self-insured (ERISA) plans and GLP-1 appeals

TLDR. If your GLP-1 claim was denied by a self-insured employer plan, you are in ERISA territory. ERISA gives you mandatory internal and external appeal rights. The internal appeal must be decided in 30 days (pre-service) or 60 days (post-service). If that fails, you can request independent external review. ERISA external review overturns about 40 percent of cases that reach it. The big difference from state-regulated plans: you cannot sue under state insurance law, only under federal ERISA. That makes getting the documentation right on the internal appeal more important than in any other context.

Why ERISA plans are different

The Employee Retirement Income Security Act of 1974 (ERISA) governs self-insured employer benefit plans at the federal level. That preemption matters practically: state insurance laws that apply to fully-insured plans, including state-mandated benefit requirements and state external review laws, do not apply to ERISA plans. The US Department of Labor enforces ERISA, not your state insurance commissioner.

For GLP-1 appeals, this means two things. First, if your state passed a law requiring insurance coverage of obesity medications, that law does not bind your self-insured employer’s plan. Second, if the plan denies your appeal, your legal recourse is under federal ERISA, not state contract law. That is a narrower path. Courts reviewing ERISA benefit denials typically apply a deferential standard if the plan gives the administrator discretionary authority, which most plans do.

None of this means the appeal process is futile. Many internal appeals succeed when the documentation is right, and external review (covered below) overturns roughly 40 percent of the denials that reach it. But the process has specific rules and specific deadlines, and missing them matters.

Step 1: internal appeal

Every ERISA plan must provide at least one level of internal appeal. The denial notice itself must tell you the specific reason for denial and explain the appeal process. Read it carefully. The reason stated in the denial letter is the target you are addressing in the appeal.

Common denial reasons for GLP-1 prior authorizations:

• BMI below plan threshold (many plans require 30 or 35 with comorbidities)
• Missing documentation of six-month supervised diet program
• Obesity medications excluded from the formulary entirely
• Step therapy requirement not satisfied (required trial of a cheaper drug first)

For each denial reason, the appeal response needs specific documentation. BMI denials need a provider letter with current height, weight, and BMI calculation. Missing diet documentation needs chart notes spanning six months that reference dietary counseling or a supervised program. Formulary exclusions are the hardest: if the plan simply excludes GLP-1s for obesity, you are arguing for a formulary exception, not fixing a documentation problem. The grounds are medical necessity, typically requiring the prescriber to document why no other treatment is medically appropriate for this patient.

File the internal appeal in writing. Include the prescriber’s letter, relevant chart notes, and any clinical guidelines (the American Diabetes Association Standards of Care, AACE obesity guidelines) that support treatment. Send it certified mail or via a tracked method so you have a delivery record. The prior authorization letter template covers what the prescriber’s letter should contain.

The plan must decide a pre-service (before treatment) internal appeal within 30 days. A post-service (after you paid out of pocket) appeal within 60 days. Missing those deadlines is a violation; if the plan misses its own deadline, you may be able to treat the appeal as exhausted and proceed to external review immediately.

Step 2: external review

If the internal appeal fails, ERISA plans must offer independent external review. An Independent Review Organization (IRO) that is not affiliated with the plan reviews the medical evidence and issues a binding decision. The plan must comply.

To request external review: submit the request within four months of the final internal appeal denial (or within the timeframe your plan specifies, whichever is sooner). The IRO review is free to you. The IRO may ask for additional medical records; supply them promptly.

IROs overturn about 40 percent of cases that reach them, according to aggregate IRO data. For GLP-1 cases specifically, the overturn rate is higher when the denial rests on a documentation gap rather than a blanket formulary exclusion. Blanket exclusions are the hardest cases because the IRO is then deciding whether the exclusion itself violates the plan’s requirement to provide benefits in accordance with the plan documents, not whether a medical necessity criterion was met incorrectly.

The IRO decision is final and binding on the plan. If the IRO upholds the denial, your remaining options are a complaint to the Department of Labor (for ERISA violations in the process itself) or a federal lawsuit. Both are expensive paths relative to the benefit value for most patients.

Employer override: the path most patients miss

Self-insured plans have one avenue that fully-insured plans do not: the employer can change the benefit design. If the plan excludes GLP-1s for obesity and the appeal process has failed, the employer can add the benefit or grant an individual exception. Whether they will is a different question. But the request goes to the benefits decision-maker at your company, not the claims administrator.

This is most viable at smaller employers where the person making benefits decisions is reachable, and where the cost of one or two GLP-1 prescriptions is manageable relative to the total benefits budget. For how to structure that request, see how to get your employer to add GLP-1 coverage.

What does not work

Two common paths hit a wall with self-insured ERISA plans.

State insurance commissioner complaint. The commissioner has no jurisdiction over self-insured ERISA plans. You can file a complaint; the commissioner’s office will tell you the same thing. The complaint may be forwarded to the Department of Labor, but do not rely on this as a primary strategy.

State-mandated benefit laws. If your state requires insurers to cover obesity medications, that requirement does not apply to your employer’s self-insured ERISA plan. The legal basis is ERISA preemption, which courts have consistently upheld. Source: US Department of Labor ERISA preemption overview.

Practical checklist

1. Read the denial letter and identify the exact stated reason.
2. Request the full plan documents (SPD, evidence of coverage) from HR if you do not have them. ERISA requires they be provided within 30 days of written request.
3. File the internal appeal in writing within the plan’s deadline (check the denial letter). Target the specific denial reason with specific documentation.
4. If the internal appeal fails, request external review within four months of the final denial.
5. In parallel, explore whether the employer will grant an exception. This runs alongside the formal appeal, not after it.
6. If GLP-1 coverage is denied and the appeal fails, use the GLP-1 cost guide to find the lowest cash-pay path. Compounded semaglutide runs from about $178/mo; Zepbound vials start at $299/mo via LillyDirect.

Frequently asked questions

Does my state’s insurance coverage law apply to my employer’s health plan?

Only if your employer’s plan is fully-insured, meaning your employer pays premiums to a commercial insurer who bears the claims risk. If your employer is self-insured (pays claims directly), ERISA preempts state insurance law. State coverage mandates do not apply. Source: US Department of Labor.

How long does an ERISA internal appeal take?

For a pre-service appeal (a drug you want to start), the plan must decide within 30 days. For a post-service appeal (a claim after you paid out of pocket), the plan must decide within 60 days. If the plan misses the deadline, you may treat the appeal as exhausted and request external review immediately. Source: DOL ERISA claims and appeals regulations.

What happens if the external reviewer sides with me?

The IRO decision is binding on the plan. The plan must cover the medication or reimburse the claim. If the plan does not comply, you can file a complaint with the Department of Labor or pursue an ERISA federal lawsuit.

Can I appeal a blanket formulary exclusion of GLP-1s?

Yes, but the path is harder than a documentation appeal. The grounds are medical necessity, arguing that no alternative treatment is medically appropriate for this patient. The prescriber’s letter needs to make that case specifically. IROs overturn blanket-exclusion GLP-1 denials at a lower rate than documentation-gap denials. The employer override (asking the employer directly to add the benefit or grant an exception) is often more practical for blanket exclusions.