ERISA plans: different rules, different appeals

Why do ERISA self-funded plans ignore state insurance law?

A self-funded employer plan isn't ignoring state insurance law so much as sitting outside its reach: the plan is governed by the federal Employee Retirement Income Security Act, which broadly preempts state regulation of employee benefit plans, and a self-funded plan generally isn't treated as "insurance" a state can regulate the way it regulates a licensed insurer 1Ref 1U.S. Department of Labor (2026).ERISA.That self-funded employer plans are governed by ERISA rather than state insurance law — which is why state prompt-pay and assignment laws often do not reach them — and that ERISA sets the claims-and-appeals framework for those plans, used here as the core preemption explanation and the source for ERISA's own claims-procedure timelines and external review right.. The employer, not an insurance company, is the one actually bearing the financial risk of the claims paid.

That's the whole mechanism behind why a state's prompt-pay law, its assignment-of-benefits rule, or its own appeal-deadline statute can simply not apply to a specific patient's plan, even though the exact same service, billed to a fully-insured plan from the same insurer, would be governed by that state's rules. The question that actually matters for a given claim isn't which insurer administers the plan — it's whether the plan is self-funded or fully-insured.

What makes a plan "ERISA" in the first place

The test is financial risk, not the name on the insurance card: a self-funded (or self-insured) plan is one where the employer pays claims directly out of its own funds, often using an insurer only to administer the plan — process claims, run a provider network — under an administrative-services-only arrangement. A fully-insured plan is one where the employer pays a premium to a licensed insurer, and that insurer bears the risk and is the one a state's insurance department actually regulates.

The same insurer frequently does both. Aetna, for one example, both underwrites fully-insured plans subject to state insurance law and administers self-funded ASO plans for other employer groups governed instead by ERISA — so seeing a familiar insurer's name on the card tells you nothing about which rulebook actually applies 2Ref 2Aetna (2026).Aetna Clinical Policy Bulletins.That Aetna publishes its own provider policies — cited only as a named example of a single insurer both underwriting fully-insured, state-regulated plans and administering self-funded ASO plans for other employer groups, illustrating that the insurer's name alone doesn't reveal which legal framework applies (spec R8).. The plan documents, or a direct question to the payer, are what actually answer it.

Employer size is a loose signal, not a rule: larger employers self-fund more often because they can absorb claims volatility across a big enough workforce, while smaller employers more often buy fully-insured coverage. It's a tendency worth knowing, not a substitute for actually confirming the specific plan's status.

What that means for prompt-pay, appeal, and assignment rules specifically

State prompt-pay laws, which set deadlines for a fully-insured plan to pay a clean claim, and state rules on whether a patient can assign benefits directly to a provider, are both state insurance regulation — and both are among the protections that often don't reach a self-funded ERISA plan at all. Instead, ERISA's own claims-procedure regulation sets its own timelines for deciding claims and running internal appeals, plus a right to external review, independent of whatever a given state requires for its regulated plans 1Ref 1U.S. Department of Labor (2026).ERISA.That self-funded employer plans are governed by ERISA rather than state insurance law — which is why state prompt-pay and assignment laws often do not reach them — and that ERISA sets the claims-and-appeals framework for those plans, used here as the core preemption explanation and the source for ERISA's own claims-procedure timelines and external review right..

The practical effect: the same denial reason, on two patients working for two different employers, can carry two different appeal windows and two different processes, even when both patients happen to be enrolled through the same insurance company. A state's own appeal-deadline statute simply isn't the applicable rulebook for the ERISA patient, however clearly it might apply to the other.

Assignment of benefits works the same way: a state law requiring a payer to honor a patient's assignment and pay the provider directly is, again, state insurance regulation, and a self-funded plan can choose not to honor it even where the identical plan document from a fully-insured competitor would be bound to. Checking the plan's own assignment language, rather than assuming a state's assignment statute applies, avoids a payment routed to the patient instead of the practice.

How to tell which rulebook applies to a specific patient

Before assuming any deadline, assignment rule, or prompt-pay protection applies, confirm whether the patient's specific plan is self-funded or fully-insured. The plan document (the Summary Plan Description) usually states this directly, the explanation of benefits sometimes notes it, and the payer's provider line can confirm it on request — asking directly whether a plan is self-funded or ERISA-governed is a normal, answerable question.

Getting this wrong in either direction costs real time: assuming a self-funded plan follows a state's prompt-pay deadline when it doesn't means tracking a clock that was never running, and assuming a fully-insured plan follows ERISA's claims-procedure timeline when state law actually governs means missing the deadline that was.

What still varies by state on the other side of the line

None of this means state insurance law is irrelevant — it's simply the governing framework for fully-insured plans, and it varies by state on exactly the points that matter most: prompt-pay deadlines, assignment-of-benefits rules, and external review procedures. Each state's insurance department regulates its own fully-insured market, and the National Association of Insurance Commissioners coordinates model laws that individual states adapt into their own statutes rather than applying uniformly 3Ref 3National Association of Insurance Commissioners (2026).National Association of Insurance Commissioners.That state insurance departments regulate fully-insured plans and that NAIC coordinates model laws, such as prompt-pay rules, that individual states adapt rather than apply uniformly, used here to explain that state-side rules still vary by state and must be checked, not assumed, for a fully-insured patient..

That means a fully-insured patient's state matters just as much as whether their plan is self-funded in the first place — the specific deadline or rule for a fully-insured plan in one state is not a safe assumption for the identical plan type in a neighboring state. Your state's own insurance department, not a generalization from a different state's rule, is the source that actually controls.

Why this distinction is worth tracking rather than memorizing

Denials that go unworked are common across the industry — in-network denial rates in ACA marketplace plans run in the high teens with wide variation by insurer, and appeals get filed on well under one percent of denied claims 4Ref 4Kaiser Family Foundation (2025).Claims Denials and Appeals in ACA Marketplace Plans.That in-network claim denial rates in ACA marketplace plans average in the high teens with wide insurer variation, and that consumers appeal well under 1% of denied claims, used here to frame why tracking the correct governing framework for each claim matters. — and a claim that sits on the wrong assumed clock, ERISA when state law actually applied or the reverse, is one more way a workable appeal quietly expires.

The fix isn't memorizing every plan type's rules; it's building the habit of asking the self-funded-or-fully-insured question for every new patient relationship, recording the answer, and letting that answer decide which deadline and which process actually governs before a denial ever needs a response.