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
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.
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 Superseded by the final status above; lifecycle language, deadlines and “pending” states in this section describe the record as it stood on that date, not the current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
- California Senate — floor analysis material, SB 503 · bill record (Digital Democracy) · author’s legislation page · author fact sheet (PDF)
Register: the record store · internal identity CA|2025-2026|SB503 · verification state VERIFIED · tracker: California Legislature 2026.
