Humira biosimilars to become preferred on plan formularies beginning Jan. 1, 2026


October 1, 2025

Starting Jan. 1, 2026, Humira biosimilars will become preferred products on all plan formularies. Medicare Advantage plans will prefer Hadlima and adalimumab-aaty, while all other plans will prefer adalimumab-abdm and adalimumab-aaty. ASO groups will transition to Humira biosimilars upon renewal on or after Jan. 1, 2026.

Why the change?

Humira biosimilars have been available since 2023, but recent changes in the marketplace have made them more cost competitive.

These biosimilars provide the same experience for members as Humira, including administration method, efficacy and side effect profile, while offering cost advantages.

How are your employees affected?

Most members will have pre-authorizations transitioned to the preferred biosimilar products effective Jan. 1, 2026. Members of ASO groups will transition on their plan’s renewal date. Affected members will receive notification letters about this formulary change in advance of the transition.

In the unlikely event a member doesn’t tolerate a biosimilar, their doctor may request pre-authorization for Humira.