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In this section: California

Bill dossier · California 2025–26 session · session closed September 30, 2026
Current through · Last editorial review October 1, 2026 · Original snapshot September 18, 2026, 3:00 PM PT (archived below)

SB 503: Health care artificial intelligence: bias in clinical decision-making and resource allocation

SIGNED SEPTEMBER 30, 2026

Final status · recorded October 1, 2026

SIGNED SEPTEMBER 30, 2026SB 503 was signed on September 30, 2026. Operative: Jan. 1, 2027†. It is law; the chaptered text is the controlling version. Source: California 2026 Final Legislative Ledger · Current analysis: California’s Health-AI Experiment Is Now Law.

Published
September 1, 2026
Originally verified through
September 18, 2026, 3:00 PM PT
Final-status update
October 1, 2026
Current through
October 1, 2026

Archived snapshot — originally current through September 18, 2026, 3:00 PM PTPreserved as originally published. Superseded by the final status above; lifecycle language, deadlines and “pending” states in this section describe the record as it stood on that date, not the current state. The dossier body below (what the bill does, legislative history, analysis and “what happens next”) is the September record.

30 AUGUST · 6:00 PM

Bill

SB 503 (2025-2026)

Internal identity

CA|2025-2026|SB503

Author

Senate author of record

Lifecycle

PRESENTED 30 AUGUST 2026 — GOVERNOR ACTION PENDING

Where it sits

Governor

Last recorded action

August 30, 2026

Recorded vote

—

Enrollment

ENROLLED

Governor

Pending — deadline 30 September 2026

Urgency

None recorded

Chapter

Not applicable

Verification

VERIFIED

Governor deadline

September 30, 2026

Verified

September 15, 2026

Latest recorded action

August 30, 2026. Enrolled and presented to the Governor at 6:00 PM.

What the bill does

Addresses artificial intelligence in health care services: identification of AI systems used for clinical decision-making or health-care resource allocation that carry known or reasonably foreseeable risks of biased outputs, with duties described in Senate floor material as falling on developers and deployers, including mitigation, monitoring and reporting.

What it does not do

Not law. The enrolled text has NOT been read at this snapshot: the developer and deployer duties, the definition of clinical-decision AI and resource allocation, the treatment of protected populations, and local deployment responsibility are stated here only as the floor material described them. Exact analysis is withheld until the enrolled text is read.

KPSGILL position

No position taken, and no duty-by-duty analysis is published yet — the enrolled text has not been read. When it is, it will be assessed against the KPSGILL AI Governance Readiness Framework, which treats developer and deployer accountability, bias monitoring and model change control as separate dimensions.

Open verification items

Named here rather than answered with an assumption.

  • Enrolled text of SB 503 — full read required before any duty-by-duty analysis
  • Governor action by 30 September

What happens next

Governor action deadline: September 30, 2026. This bill was enrolled and presented to the Governor on 30 AUGUST 2026, 6:00 PM, so the deadline runs from a presentment on the record rather than from the session-wide date applied mechanically. Every qualifying measure is tracked on the Governor’s Health Bill Desk; scheduled dates sit on the decision calendar.

Primary sources

Register: the record store · internal identity CA|2025-2026|SB503 · verification state VERIFIED · tracker: California Legislature 2026.

Bill dossier · revised 18 September 2026, 3:00 PM PT.

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