1. Non-Formulary Drugs & Prior Authorization Denials
Cause: The medication is not included on the patient’s insurance formulary or is explicitly excluded from coverage.
Prevention:
- Include all of the previous medications including outcomes and durations.
- If clinically necessary, include strong documentation and rationale for using a non-formulary drug when submitting the PA.

2. Missing Clinical Justification in PA Requests
Cause: The PA lacks necessary documentation such as past treatment history, diagnosis codes, or lab results demonstrating necessity.
Prevention:
- Use structured PA templates that prompt providers to include:
- Step therapy failures
- Diagnosis with ICD-10 code
- Supporting clinical notes and labs
According to the American Medical Association, most physicians say PA causes care delays
3. Step Therapy Gaps Causing PA Denials
Cause: Insurers require the patient to try and fail lower-cost or first-line medications before approving the requested one.
Prevention:
- Clearly document previous therapies tried, including duration, dosage, and patient response.
- Submit evidence of contraindications or adverse reactions if bypassing step therapy is necessary.
4. Quantity Limits and Dosage Rejection
Cause: The requested dosage or quantity exceeds what is permitted by the payer without additional approval.
Prevention:
- If higher quantities or doses are clinically justified, include medical rationale and titration plan in the PA.
5. Manual Submissions and PA Delays
Cause: Manual fax submissions, errors in routing to the correct PBM, or delays in initiating PA can lead to denials or processing timeouts.
Prevention:
- Use real-time ePA (electronic prior authorization) systems like Karova Health.
- Set up alerts for medications that typically require PA.
Learn how Karova Health uses AI to automate prior authorization submissions.
Tired of denials delaying care?
Karova Health helps reduce prior authorization denials with smart AI and structured submissions.
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