Step therapy — also called 'fail first' — is a payer requirement that a patient try a preferred (often lower-cost) drug or treatment, and have it fail or prove inappropriate, before the plan will cover another option. Exceptions are available when the required step is medically inappropriate, and they're won with documentation.
How it works
- The plan requires the preferred therapy first; the requested one is covered only after a failed or inappropriate trial.
- It commonly applies to specialty drugs and high-cost treatments.
- An exception can bypass the step when the required option is contraindicated, was already tried, or would be ineffective.
Frequently asked
Can step therapy be overridden?
Yes — with a documented exception showing the required step is medically inappropriate, was already tried and failed, or would be ineffective or harmful.
Is step therapy the same as prior authorization?
Related but distinct: step therapy requires a treatment sequence; prior authorization is a pre-service approval. A drug can be subject to both.
Primary sources: CMS — Interoperability & Prior Authorization Final Rule (CMS-0057-F). General information, not legal or medical advice — confirm against the governing rule for the plan type.
When the appeal has to be written, and cited
Upload the denied EOB and Merits returns a complete, citation-verified appeal letter — the clinical argument, the payer's own coverage criteria, and your federal appeal rights — in about a minute.