Prior authorization is a coverage checkpoint. A health plan may require the prescriber or treatment site to submit information before the plan agrees that the requested medicine or service meets its coverage rules.
For expensive infused and injected medicines, the authorization problem is often bigger than the drug name alone. The plan may care about the diagnosis, the exact formulation, previous therapies, dose, billing code, treatment setting, preferred products or biosimilars, and whether specialty-pharmacy sourcing is required.
- The exact brand, generic name, formulation and route.
- The diagnosis and the payer's current coverage policy for that diagnosis.
- The HCPCS or other billing code and the correct units.
- Whether the plan prefers another product in the same therapeutic family.
- Whether the medical benefit or pharmacy benefit controls the request.
- Whether the treatment site itself triggers a site-of-care rule.
A denial is more useful when it gives a specific reason
CMS rules for certain payers require specific reasons for prior-authorization denials, which can help the patient and provider understand whether the problem is missing documentation, a coverage criterion, the wrong benefit channel, a preferred-product rule, or something else.
Don't confuse prior authorization with financial assistance
A copay card or grant does not fix a coverage denial. First solve the coverage pathway. Then use assistance to address the patient's remaining cost.