Allergy & immunology denials: appealing biologic and IVIG denials

Denials in allergy and immunology center on biologics for severe asthma, chronic rhinosinusitis with nasal polyps, and chronic urticaria (gated behind controller step therapy and biomarker or severity criteria such as eosinophil count or IgE), and on IVIG for primary immunodeficiency (gated behind a documented diagnosis and laboratory criteria). AAAAI practice parameters are the reference points; the denial typically flags the missing step or the unestablished diagnostic criterion.

Why these denials happen

Plans require a documented trial of standard controller therapy and biomarker or severity criteria before a biologic for severe asthma or related conditions, and a documented immunodeficiency diagnosis with supporting laboratory criteria before IVIG. AAAAI practice parameters support these therapies for the appropriate patients, so the denial is generally a documentation gap — the controller trail, the biomarker, or the diagnostic work-up isn't mapped to the plan's criteria.

The common denials

• Severe-asthma biologic denied for step therapy — standard controller trial not documented.
• Biomarker or severity criteria (e.g., eosinophil count, IgE) not established for the biologic.
• IVIG denied — primary immunodeficiency diagnosis or laboratory criteria not documented.
• Non-preferred biologic chosen without rationale over the plan's preferred agent.
• Reauthorization denied — continued response not re-documented.

Is it worth appealing?

How to appeal

1. 1

   Document the controller step trail

   For a biologic, show the trial, failure, intolerance, or contraindication of the standard controller therapy the plan requires.

2. 2

   Establish the biomarker or severity criteria

   Attach the eosinophil count, IgE, or severity measure the policy and the biologic's labeling turn on.

3. 3

   Prove the IVIG diagnosis

   For IVIG, document the immunodeficiency diagnosis and the laboratory criteria the policy names, mapped to the AAAAI parameters.

Frequently asked

Clinical-coverage patterns and guideline references are summarized for plain-language reference and vary by plan and payer policy. This is general information for clinicians and billing staff, not medical, legal, or coding advice — confirm against the governing coverage policy and the current guideline for each claim.