More MA Enrollees Are Facing Step Therapy Requirements for Part B Drugs

Over half of Medicare Advantage enrollees were in plans that applied step therapy to the 10 most commonly used rheumatoid arthritis (RA) medications covered by Medicare Part B in 2023, according to a recent Avalere analysis.

Since 2019, CMS has given MA plans the ability to use step therapy protocols — meaning a patient may be required to try a less expensive drug before moving to the more expensive one — for physician-administered and other Part B medications. Avalere analyzed MA plans’ annual medical policy and formulary restrictions for 22 RA drugs from 2018 to 2023 and found that the percentage of MA beneficiaries in plans that use step therapy has increased steadily since 2019. For two of the drugs studied, 78% of enrollees were in MA plans that applied step therapy in 2023.