Legis
Healthcare
AB 1887, Chapter 557, Statutes of 2026 · Sunday 27 September 2026

Prescription drug coverage for rare diseases

Starting in 2027, plans and insurers must act within 30 days on prior authorization for certain sole FDA-approved rare-disease drugs.

Patients with rare diseases may receive automatic approval when a plan or insurer delays a decision or an authorization dispute remains unresolved after 30 days.

What the law does ​

  • Applies to health plan contracts and insurance policies issued, amended, or renewed on or after January 1, 2027.
  • Requires prior-authorization decisions within 30 days of the initial request for an FDA-approved drug that is the only FDA-approved treatment for a rare disease.
  • Limits the protection to drugs prescribed by a specialist with relevant expertise who determines the drug is medically necessary.
  • Requires immediate approval if no decision is made within 30 days or a dispute remains ongoing at that deadline.
  • Defines a rare disease as one affecting fewer than 200,000 people in the United States.
  • Excludes Medi-Cal managed care contracts.

Who it affects ​

  • Patients with qualifying rare diseases.
  • Specialists and their staff submitting prior-authorization requests.
  • Health care service plans and health insurers.

Context ​

Existing faster prior-authorization timelines remain unchanged.