Appeal a Humana Medicare Advantage Denial

Why Humana denies Medicare Advantage claims

Humana is overwhelmingly a Medicare Advantage insurer — approximately 85% of its revenue comes from its 5.7 million MA members. Its MA prior-authorization denial rate is 12.8%, well above the 6.4% industry MA average. NAIC complaint index: 1.45 (45% above average).

In 2021 Humana entered a $210 million settlement with the Department of Justice for systematic prior-authorization delays that caused patient harm — including delayed access to post-acute care and skilled nursing services. In 2024 CMS imposed intermediate sanctions (including a temporary enrollment freeze) for deficient organization determinations and grievances across multiple MA contracts. Estate of Johnson v. Humana (S.D. Fla. 2025) is a wrongful-death case alleging an 11-day prior-auth delay for cardiac surgery contributed to patient death.

For skilled-nursing-facility and post-acute care denials specifically, Humana uses Change Healthcare's InterQual criteria, which are often more restrictive than CMS's own Jimmo v. Sebelius (2013) standard. Under Jimmo, maintenance of function or prevention of decline is sufficient for skilled-care coverage — improvement potential is not required. Humana reviewers sometimes still apply an informal improvement requirement; that gap is the core of a successful Humana SNF or home-health appeal.

Your rights under federal and state law

Medicare Advantage appeals are governed by 42 CFR Part 422 Subpart M and the 2024 CMS-4201-F final rule. Beneficiaries have five levels of appeal rights: (1) plan reconsideration (60 days to file, 30-day decision for pre-service requests, 72 hours for expedited); (2) Independent Review Entity (automatically triggered if plan upholds denial, or on request); (3) Office of Medicare Hearings and Appeals (ALJ) for claims meeting the amount-in-controversy threshold; (4) Medicare Appeals Council; (5) federal district court.

MA plans cannot impose coverage criteria more stringent than original Medicare (42 CFR 422.100). If a National Coverage Determination (NCD) or Local Coverage Determination (LCD) covers the service, the MA plan must cover it. Beneficiaries retain the right to file 1-800-MEDICARE complaints in parallel with the formal appeal.

How to appeal a Humana Medicare Advantage denial: step-by-step

1. Pull the Medicare coverage rule that applies. Find the National Coverage Determination (NCD) or Local Coverage Determination (LCD) governing the service. Under 42 CFR 422.100, an MA plan cannot impose criteria more stringent than original Medicare. If the service is covered under NCD/LCD, the MA plan must cover it.
2. Build a targeted clinical packet. Treating-physician letter of medical necessity dated after the denial, complete progress notes covering the relevant episode, diagnostic studies, documented prior therapies or step-therapy history, and an explicit citation to the applicable clinical guideline. Pair the clinical packet with the CMS-4201-F timeframes — Humana faces active CMS monitoring after the 2024 intermediate sanctions.
3. Write the internal appeal letter. Quote the denial reason in Humana's own words, rebut each stated reason with cited clinical and legal authority, and name the Humana-specific precedent — the $210M DOJ prior-auth settlement, 2024 CMS sanctions, Jimmo v. Sebelius — that demonstrates a documented pattern. Request a peer-to-peer with a same-specialty board-certified physician.
4. File a 1-800-MEDICARE complaint in parallel. CMS complaints are tracked at the contract level and inform the Star Ratings process — they matter to Humana. Reference the 2024 CMS enforcement record in the complaint narrative.
5. The five-level MA appeal ladder is automatic at Level 2. If Humana upholds the denial, the case moves to the Independent Review Entity without a separate filing. Level-3 ALJ hearings require the amount-in-controversy threshold and 60-day filing window. IRE reviews overturn approximately 75% of denials nationally — skipping levels is self-inflicted damage.

Key evidence to include in your Medicare Advantage appeal

• Denial letter (every page). Including the specific denial code, criteria cited, reviewer name/credentials if listed, appeal instructions, and the exact date of denial.
• Complete medical records for the relevant episode. Progress notes, consultation notes, diagnostic studies, prior-treatment records. Do not rely on a summary — submit the actual records.
• Treating physician letter of medical necessity (dated). Explicitly addressing each denial reason, linking the clinical facts to guideline recommendations, and stating the physician's credentials and direct familiarity with the patient.
• National Coverage Determination (NCD) or Local Coverage Determination (LCD) citation showing the service is covered under original Medicare.
• HHS OIG report OEI-09-18-00260 citation showing 13% of MA prior-auth denials should have been approved.
• CMS-4201-F compliance evidence (specific denial reasons, 72-hour / 24-hour timeframes).
• State DOI complaint submission record. Filed in parallel with the internal appeal — the confirmation number goes in the appeal cover letter as "CC: [state insurance commissioner]."

Deadlines and timelines you cannot miss

MA plan reconsideration: 60 days from denial to file. Plan must decide within 30 days (pre-service), 60 days (post-service), or 72 hours (expedited). Level-2 Independent Review Entity: automatically triggered if the plan upholds or misses its decision window. Level-3 ALJ: 60 days from IRE decision, with an amount-in-controversy threshold. Level-4 Medicare Appeals Council and Level-5 federal district court: short filing windows at each step.

Frequently asked questions

How long do I have to appeal a Humana Medicare Advantage denial?

You have 60 days from the date on the denial notice to file a Medicare Advantage reconsideration. The plan must decide pre-service standard requests within 30 days, post-service within 60 days, and expedited requests within 72 hours.

What is the success rate for Humana Medicare Advantage appeals?

Humana MA Level-2 (IRE) reviews overturn approximately 75% of denials. Citing the 2021 $210M DOJ settlement and the 2024 CMS sanctions places the appeal in a context Humana has to engage with on the record.

Do I need a lawyer to appeal a Humana Medicare Advantage denial?

No — most successful health-insurance appeals are filed by patients, patient advocates, or the treating physician's office without legal representation. The process is administrative, not judicial. A lawyer becomes useful mainly at the federal-court or state-court stage (ERISA §502 suit after external review) or for very high-dollar disputes. AppealArmor generates the written appeal, the state DOI complaint, and the cited supporting evidence.

Can an MA plan have stricter criteria than original Medicare?

No. Under 42 CFR 422.100 an MA plan cannot impose coverage restrictions more stringent than original Medicare. If a National Coverage Determination (NCD) or Local Coverage Determination (LCD) covers the service, the MA plan must cover it. CMS-4201-F reinforced this in 2024.

Does AppealArmor work for Humana Medicare Advantage denials?

Yes. AppealArmor maintains insurer-specific intelligence — denial patterns, enforcement history, regulatory vulnerabilities, and condition-specific clinical citations — that feeds every appeal letter. For a Humana Medicare Advantage denial the packet typically includes the appeal letter, the state DOI complaint, the specialty-society guideline citation, and the letter-of-medical-necessity template for your physician to sign.