AB 539: Health care coverage: prior authorizations.

This bill aims to amend existing health care coverage laws in California. It requires a prior authorization for a health care service to remain valid for at least one year from the date of approval, or throughout the course of prescribed treatment if less than one year. This provision aims to prevent health care service plans from rescinding or modifying prior authorizations after a health care provider has rendered the service in good faith. The bill also states that any violation of this provision would be a crime, requiring a state-mandated local program. Additionally, the bill provides that reimbursement is not required for certain costs associated with implementing this new law.