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SB 503CALIFORNIASession 20252026State Billfiled

High Impact

California SB 503 requires AI developers and healthcare providers to identify and mitigate bias in clinical decision-making tools

Original title: Health care services: artificial intelligence.

Record date · August 30, 2026

Bill progressHistory & official text ↓

Introduced

Committee

Floor Vote

Passed

Law

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What This Bill Would Do

SB 503 mandates that developers and users of AI-driven s identify and reduce the risk of biased impacts in medical diagnosis and treatment recommendations. The bill requires developers to provide documentation on intended uses and risks, while healthcare providers must regularly monitor these systems for bias.

Why it matters

This bill establishes new accountability standards for AI tools used in medical settings, directly impacting how healthcare providers and patients interact with automated systems that influence diagnosis and treatment decisions.

Who It Would Affect

Groups the bill's text would affect if enacted, as described in the record. Being affected is not a position for or against it.

Directly affected

AI developers

They must create documentation on system risks and make efforts to mitigate biased impacts in their software.

Directly affected

Healthcare providers

They must regularly monitor AI systems used in their practice and take steps to mitigate any identified risks of bias.

Directly affected

Patients

They are the subjects of the clinical decisions influenced by the AI systems regulated under this bill.

Key Facts

You don't have to trust us. Each fact below is taken straight from the official document - click any one to see the exact passage, highlighted in the original.

Frequently Asked Questions

What is a 'clinical decision support system' under this bill?

It is an artificial intelligence system that produces a prediction, classification, recommendation, evaluation, or analysis to help with medical diagnosis or treatment.

Who is responsible for checking AI systems for bias?

Both the developers who create the AI and the s (such as clinics or hospitals) who use the AI in their health programs are responsible for identifying and mitigating bias.

What else do you want to know?

News Coverage

Coverage by outlet perspective1 article

Unrated 1

Blind spot - only covered by center outlets

California Governor signs bills AB 1979 and SB 503 on human oversight and transparency for AI in healthcare

Digital Watch ObservatoryOct 5, 2026

Bias ratings based on AllSides / Media Bias/Fact Check

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Where This Stands

Currently filed. The next step in the legislative lifecycle is Committee.

Version history & redline

8 versions on file

Official version history is partial: 8 linked texts are unavailable or incomplete. Source links remain available below.

Comparing 07/17/25 - Amended Assembly → 09/04/25 - Amended Assembly

removed addedOfficial text

The text diff for this stage has not been computed yet.

OpenStates mirror retained for redline only; official linked text was unavailable

Redline computed from the official version text (record lane).View this version →

Lobbying Activity

No state lobbying filings in our records match this bill. Federal lobbying reports (LDA) cover Congress, so they are not listed on state bills.

Full breakdown

Who this bill affects and the strongest case for and against it, written only from the bill’s own text.

Related Legislation

State Bill