AB 539: Health care coverage: prior authorizations. - California

08/30/26 - Enrolled → AB539 · 1 edit

MINOR

The diff reflects a change in document format rather than a change in legislative content. The enrolled bill's formal wrapper (signatures, dates, Governor's approval line) was removed and replaced with a web page layout including navigation elements, version history metadata, and a digest key. The actual statutory text of Sections 1, 2, and 3 is substantively identical between the two versions.

TECHNICAL

The formal enrolled bill formatting (Assembly/Senate passage dates, Chief Clerk and Secretary signatures, Governor's approval line, page numbers) was removed and replaced with a web page presentation including navigation links, version history, publication date, and a digest key showing Vote: Majority, Appropriation: No, Fiscal Committee: Yes, Local Program: Yes.

08/21/26 - Amended Senate → 08/30/26 - Enrolled · 3 edits · Aug 30, 2026

MINOR

This is the enrolled (final) version of AB 539, which primarily cleans up confusing and contradictory drafting language from the amendment process. The core policy - requiring prior authorizations to remain valid for at least one year or the period requested by the treating provider if less - is unchanged. The enrolled version removes redundant phrases like 'not to exceed a period of at least one year' (which was logically contradictory) and eliminates a stray reference to 'changes plans' in the coverage termination exception, making the statutory text clearer without altering its substantive effect.

TECHNICAL

Simplified the prior authorization validity language in both Health and Safety Code 1371.8(b) and Insurance Code 796.04(b). Removed the contradictory phrase 'not to exceed a period of at least one year from the date of approval, provider if less than one year' and replaced it with the cleaner 'or the period requested by the treating provider if less than one year.' The practical effect is the same but the language is no longer self-contradictory.

Removed the stray phrase 'a medication' from subsection (c) of both sections. The old text read 'for a medication an approved prior authorization request for a prescription drug' which was a drafting artifact. The enrolled version reads 'for an approved prior authorization request for a prescription drug.'

ELIGIBILITY

Removed the phrase 'if the enrollee changes plans within the one year period' (and parallel 'changes insurers' language) from subsection (d) of both sections. The old text appeared to list two separate conditions for when the one-year validity does not apply (changing plans OR coverage termination). The enrolled version retains only the coverage termination condition, which is broader and already encompasses plan changes since changing plans typically involves termination of the prior plan's coverage.

07/02/26 - Amended Senate → 08/21/26 - Amended Senate · 5 edits · Aug 21, 2026

MODERATE

The August 21 Senate amendment to AB 539 clarifies and strengthens the minimum one-year validity period for prior authorizations, adds an explicit provision allowing plans and insurers to authorize longer periods, narrows the medication exception to prescription drugs specifically, and significantly expands the coverage-termination exception from merely 'changing plans' to any termination of coverage consistent with state or federal law, with specific rules for when the authorization expires.

REQUIREMENT

The prior authorization validity period language in both Section 1371.8(b) and 796.04(b) was restructured to make 'at least one year from the date of approval' the primary minimum, with the treating provider's required treatment period as an alternative that cannot exceed one year. The previous version led with the provider's required period and used ambiguous 'not to exceed a period of at least one year' phrasing.

A new sentence was added to both 1371.8(b) and 796.04(b) stating that the one-year minimum does not prohibit a plan or insurer from authorizing a prior authorization period greater than one year, removing any ambiguity about whether longer periods are permitted.

New language was added to subdivision (d) specifying that in termination cases, the approval duration expires on the date of coverage termination, unless otherwise required by Section 1373.96 (for service plans) or Section 10133.56 (for insurers) or any other applicable law.

DEFINITION

The exception in subdivision (c) was narrowed from 'a medication' to 'an approved prior authorization request for a prescription drug,' and the reference to state or federal law was clarified to apply to 'that prescription drug' specifically, limiting the exception's scope.

ELIGIBILITY

Subdivision (d) in both sections was expanded from applying only when an enrollee 'changes plans' (or insured 'changes insurers') to applying whenever coverage under the plan or insurer that issued the approval is terminated for any reason consistent with state or federal law. This covers not just switching plans but also loss of coverage, non-renewal, and other terminations.

04/28/25 - Amended Assembly → 07/02/26 - Amended Senate · 4 edits · Jul 2, 2026

MODERATE

The Senate amendment significantly narrows and conditions the prior authorization validity period. Instead of a flat one-year minimum, the validity now must match what the treating provider requires for the course of treatment (capped at one year), applies only to in-network providers, excludes medications governed by state or federal law, and is voided if the patient changes insurers within that period.

Scope change

The bill's protections are narrowed in three ways: limited to in-network providers only, capped at what the treating provider deems necessary for treatment (rather than a blanket one year), and explicitly excluded from applying to medications or when a patient switches insurers.

REQUIREMENT

The prior authorization validity period changed from a flat 'at least one year' to 'the period required by the treating provider for the course of the prescribed treatment, not to exceed one year.' This gives providers more control over how long an authorization stays valid while still capping it at one year.

New subdivision (c) clarifies that the bill does not extend medication authorization validity beyond periods established by state or federal law and regulation, creating a carve-out for drugs.

SCOPE

The extended validity now only applies to prior authorizations 'requested by an in-network provider,' excluding out-of-network requests from the protection.

ELIGIBILITY

New subdivision (d) provides that the one-year validity period does not apply if the insured changes insurers within the one-year period, meaning switching plans voids the extended authorization protection.

02/11/25 - Introduced → 04/28/25 - Amended Assembly · 2 edits · Apr 28, 2025

MINOR

The amended version adds a provision requiring prior authorizations to remain valid throughout the course of prescribed treatment if that course is less than one year, in addition to the existing one-year minimum validity period. This applies to both health care service plans and health insurers. The change clarifies and strengthens protection for patients undergoing shorter treatment courses by explicitly tying authorization validity to completion of treatment.

REQUIREMENT

Prior authorizations must now remain valid not only for at least one year from approval, but also throughout the entire course of prescribed treatment if that course is less than one year. This was added to both Section 796.02 (health care service plans) and Section 796.04 (health insurers).

TECHNICAL

The legislative digest was reorganized: the fiscal note language about state reimbursement under the California Constitution was moved from before to after the main policy description, and the header changed from 'as introduced' to 'as amended.' Page numbers shifted from 99 to 98.

Health care coverage: prior authorizations.

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