What a denial notice must include, and what to do when it doesn't

What must an employer plan's denial notice include under ERISA?

Under 29 CFR 2560.503-1(g)(1), a group health plan's notice must give the specific reason, the plan provisions relied on, what extra information would complete the claim, the appeal steps and time limits, the right to sue after an appeal, and any guideline and clinical rationale used, or a statement that each is free on request.

The notice must be written “in a manner calculated to be understood by the claimant.” Two group-health items matter most in behavioral health: the internal rule, guideline or protocol relied on, or a statement that it was used and a copy is free on request ((g)(1)(v)(A)); and, for a medical-necessity denial, the scientific or clinical judgment applying the plan's terms to the patient, or a statement that the explanation is free on request ((g)(1)(v)(B)).

An urgent-care decision may be given by phone if a written or electronic notice with the same content follows within 3 days ((g)(2)). The decision on appeal has its own list in paragraph (j), which adds a statement that the claim file is free on request and a set sentence about voluntary dispute resolution such as mediation.

What do the ACA rules add for non-grandfathered plans?

Non-grandfathered group plans must also identify the claim (date of service, provider, claim amount if applicable), say that diagnosis and treatment codes are available on request, give the denial code and its meaning, describe the standard used, explain internal appeal and external review, and give contact details for any consumer assistance office, under 29 CFR 2590.715-2719(b)(2)(ii)(E).

On request, the plan must send the codes with their meanings as soon as practicable, and that request is not itself an appeal ((E)(2)). A denial upheld on appeal must also include a discussion of the decision ((E)(3)). Individual-market coverage, including Marketplace plans, carries the same rules under HHS's version, 45 CFR 147.136(b)(3)(ii)(E). Grandfathered plans are generally outside these additions.

Notices must also be culturally and linguistically appropriate (paragraph (e)): where 10 percent or more of a county's population is literate only in the same non-English language, the plan must offer oral language help, a translated notice on request, and a statement in that language on English notices explaining how to get help.

What must a Medicaid managed care denial notice say, and when must it arrive?

Under 42 CFR 438.404(b), the written notice must state the decision, the reasons, the enrollee's right to free copies of relevant documents including medical-necessity criteria, the right to one plan appeal and a State fair hearing and how to use them, when an appeal can be expedited, and how to keep benefits during the appeal.

The continuation item must also say when, under state policy, the enrollee may have to pay for services received during the appeal. The plan must also notify the requesting provider of a denied or reduced authorization (42 CFR 438.210(c)).

Timing depends on the decision. Cutting services already authorized needs notice at least 10 days before the date of action, with narrow exceptions (42 CFR 431.211, via 438.404(c)(1)). Payment denials are noticed when the claim is acted on. Standard authorization decisions are due within the state's timeframe, at most 7 calendar days for rating periods starting on or after January 1, 2026 (extendable by up to 14 days); expedited ones within 72 hours (438.210(d)). An authorization decision not made in time counts as a denial (438.404(c)(5)).

What does a Medicare Advantage denial notice have to include?

A Medicare Advantage plan that denies a service, item or payment, or cuts short an approved course of treatment, must send written notice in CMS-approved language that states the specific reasons, explains the right to a reconsideration, and describes the appeal process, including expedited reconsideration for service requests, under 42 CFR 422.568(d) and (e).

The notice goes to the enrollee and, as appropriate, the provider. Plans use CMS's Integrated Denial Notice (form CMS-10003-NDMCP), with limited exceptions for some integrated dual-eligible plans. Its instructions require a specific, detailed explanation, the coverage rule or plan policy relied on, and what information is needed to approve coverage; a stopped or reduced service must show the date the decision takes effect.

If the plan does not give timely notice, that failure is itself an adverse organization determination that can be appealed (422.568(f)). Filing windows are in the Medicare Advantage appeals guide.

How do you check a denial notice in five minutes?

Identify the plan type first, because it decides which list applies. Then read the notice for six things: the reason and code, the criteria, the clinical rationale, the claim details, the appeal route with its deadline, and the extras your plan type requires. Mark each item present, missing or vague, and log when the notice arrived.

The denial letter checklist turns this list into an interactive check by plan type and drafts a request for anything missing.

1. 01Name the plan type from the ID card, notice and plan documents: employer (grandfathered or not), individual or Marketplace, Medicaid managed care, or Medicare Advantage.
2. 02Note whether it is an initial denial or an appeal decision, plus the notice date and the date it arrived; the clock runs from one or the other.
3. 03Check the reason: specific to this patient and these dates? For non-grandfathered plans, a denial code, its meaning and the standard used? Look codes up in the denial code lookup; CARC 50 is the usual medical-necessity code.
4. 04Check the criteria and rationale: is the guideline named or enclosed, and for a medical-necessity denial, is the clinical judgment explained, or is each offered free on request?
5. 05Check the claim details (date of service, provider, amount) and the statement that diagnosis and treatment codes are available.
6. 06Check the route: where and how to appeal, the deadline, the expedited process, external review or State fair hearing, continued benefits (Medicaid) and the consumer assistance contact.
7. 07Enter the deadline in the appeal deadline calculator before anything else.

How do you ask the plan for what the notice left out?

In writing, to the address on the notice, naming the claim and each missing item with the rule that requires it. Ask for the guideline or criteria relied on, the clinical-judgment explanation, the claim file and, where relevant, the diagnosis and treatment codes. Send it in a way you can prove, and keep the appeal deadline in your calendar.

Cite 29 CFR 2560.503-1(g)(1)(v) for the guideline and clinical explanation, (h)(2)(iii) for free copies of documents relevant to the claim, and 2590.715-2719(b)(2)(ii)(E)(2) for the codes. Group health plans must also give mental health and substance use disorder medical-necessity criteria to participants, beneficiaries and contracting providers on request (29 CFR 2590.712(d)(1)). For Medicaid managed care, cite 42 CFR 438.404(b)(2). The criteria request letter tool drafts the request.

Most of these rights belong to the patient as claimant, so a provider asking for the claim file usually acts as the patient's authorized representative under the plan's procedures (2560.503-1(b)(4)). These rules do not pause the appeal deadline while you wait.

Does a missing element change your appeal strategy?

Usually it adds to the appeal rather than replacing it. Answer the reason you can see, state what the notice left out and when you asked for it, and ask the reviewer to address the gap. For non-grandfathered plans, a failure to follow the rules strictly can also mean deemed exhaustion, with an exception for minor violations.

Under 29 CFR 2590.715-2719(b)(2)(ii)(F), if a plan fails to strictly adhere to the internal claims and appeals rules for a claim, the claimant is deemed to have exhausted the internal process and may request external review or pursue remedies under ERISA section 502(a) or state law. The exception covers de minimis violations that do not cause, and are not likely to cause, prejudice or harm to the claimant, if the plan shows good cause or matters beyond its control during an ongoing, good-faith exchange of information. It never covers a pattern or practice of violations.

The claimant can ask for a written explanation of the violation, due within 10 days; if a reviewer or court rejects immediate review under the exception, the internal appeal can be resubmitted. In Medicaid managed care, deemed exhaustion applies when the plan misses the appeal notice and timing rules, opening the State fair hearing (42 CFR 438.408(c)(3)).

Relying on deemed exhaustion is the patient's decision, ideally with legal advice: it skips a review in which the plan could reverse itself, and the exception may apply. Otherwise, record the defect in the internal appeal, answer the clinical reason as the medical-necessity guide describes, and keep the external review request ready.