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Nucala (mepolizumab) prior authorization denied appeal

Anti-IL-5 for eosinophilic asthma, EGPA, HES, nasal polyps

To appeal a denied prior authorization for Nucala (mepolizumab), file a written appeal within 180 days. The appeal must cite the insurer's clinical policy, include a letter of medical necessity from the prescriber, and document each criterion the policy requires. The most common winning evidence is documented prior therapy history and a specialist letter.

Typical PA criteria

  • Severe asthma with eosinophils ≥150/µL (current) or ≥300/µL (past 12 mo)
  • ICS/LABA optimization
  • Age ≥6 (asthma) per label
  • Specialist prescriber

Why your PA was denied

  • Eosinophil count below threshold
  • ICS/LABA not documented
  • OCS burst history missing
  • Non-specialist prescriber

Evidence that overturns the denial

  • ✓Eosinophil counts with dates
  • ✓ICS/LABA regimen
  • ✓OCS burst frequency
  • ✓ACT score and exacerbation history

Home administration (autoinjector) may face separate site-of-care review vs. in-office. Nasal polyp indication requires prior INCS trial.

Draft a Nucala (mepolizumab) appeal letter

Free analysis identifies the cited policy and missing evidence. Then a finished letter that maps your chart to the criteria.

Draft my appeal letter

FAQ

Why was my Nucala (mepolizumab) prior authorization denied?+

The most common reasons are: Eosinophil count below threshold; ICS/LABA not documented; OCS burst history missing. Your denial letter names the specific criteria you did not meet.

How do I appeal a Nucala (mepolizumab) denial?+

File a written appeal within 180 days that cites the insurer's clinical policy, includes a letter of medical necessity from the prescriber, and documents the criteria the insurer requires.

What evidence overturns a Nucala (mepolizumab) denial?+

Eosinophil counts with dates; ICS/LABA regimen; OCS burst frequency.

What if the plan excludes Nucala (mepolizumab) entirely?+

Plan exclusions are different from medical-necessity denials. Check the Summary Plan Description. If the drug is fully excluded, an appeal will not overturn it; you may need a formulary exception or manufacturer assistance program.

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Keep reading

Not legal or medical advice. This page is a self-help resource. You make your own decisions. Strip personal identifiers (name, date of birth, address, member ID) from any document before uploading or sharing. The information here summarizes commonly-published payer policies and federal rules; confirm against your specific plan document and the current denial letter before acting.