How to appeal a step therapy denial

Step therapy is a practice that requires a patient to try a lower-cost drug proven effective for most people with the condition before the plan covers a similar, more expensive one. The denial may say "step therapy required" or list the drugs you must try first.

It is still a coverage decision you can challenge. In employer plans, a denial resulting from the application of any utilization review is an adverse benefit determination, with the same appeal rights as other denials.

Ask the plan for its step therapy exception form and instructions. In Medicare drug plans, you, your representative or your prescriber can file the request; in other plans, ask whether you or the prescriber's office should submit it.

Ask your doctor's office to document:

• Every drug already tried for this condition, with doses, start and stop dates, and who prescribed it.
• What happened on each: no improvement, partial response, side effects, an allergic reaction, or lab results that changed.
• Why the required step drug is contraindicated for you, such as an interaction with another medicine, another condition you have, pregnancy, or a past reaction to a similar drug.
• Whether you are stable on the prescribed drug now, and what the doctor expects if you switch.
• Pharmacy records or claims from an earlier plan, if you tried the step drugs under different coverage.
• Clinical guidelines that support starting with the prescribed drug for your situation.

Ask how long the plan has to decide and whether an urgent request is available. If you are already taking the drug and a new plan or a formulary change triggered the step rule, say so at the top of the request, and ask your doctor to describe what a switch would mean for you.

An American Bar Association overview published in September 2026 counted 38 states plus D.C. with some form of step therapy regulation as of early 2026. Among those states, roughly 33 require an exception for a previously failed drug, 32 for a contraindication, and 31 where the drug is expected to be ineffective. Illinois banned step therapy entirely beginning January 1, 2026, though that ban does not reach self-funded employer plans.

One limit matters for many people with job-based coverage: state step therapy laws generally apply to fully insured plans and do not apply to self-funded plans. Ask your HR office which kind of plan you have. If you have a fully insured or individual plan, ask your state insurance department what your state requires and how fast the plan must answer.

Medicare Advantage plans can use step therapy for drugs covered under Part B, within limits. A plan must apply step therapy only to new administrations of Part B drugs, using at least a 365-day lookback period. If you received the drug in the past year, point that out in your request.

Each step program must be reviewed and approved by the plan's pharmacy and therapeutics committee, and a plan may not require you to try a drug it does not cover.

Part B drug requests move quickly. The plan must decide a standard request no later than 72 hours after receiving it and an expedited request no later than 24 hours. See Medicare Advantage appeals for the next steps if the answer is no.

Medicare drug plans must have an exceptions process that covers a coverage policy that blocks a drug because of cost utilization tools, such as a requirement for step therapy. The prescriber must give a supporting statement that the drug is medically necessary, for example because the drug alternatives required by step therapy have not worked, are likely not to work, or have caused or are likely to cause harm.

See Medicare Part D appeals for decision times and the levels of appeal after an exception is denied.

Appeal through your plan's normal process, and add anything the first request lacked. If the denial turns on medical judgment, such as whether the first drug is safe or likely to work for you, ask whether it qualifies for external review, which federal rules provide for denials involving medical necessity and appropriateness.

If the drug is not on your plan's formulary at all, plans that provide essential health benefits must also offer a drug exception process with independent review of denials. For deadlines, see the pages for employer plans, Marketplace plans and Medicaid.