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    SB-503
    Health & Public Health

    Health care services: artificial intelligence.

    Engrossed
    CA
    ∙
    2025-2026 Regular Session
    0
    0
    Track
    Track

    Key Takeaways

    • Requires healthcare AI systems to be monitored and tested for bias in clinical decisions and resource allocation.
    • Mandates developers to report bias prevention efforts before releasing healthcare AI systems starting January 2027.
    • Requires healthcare facilities to submit annual reports on their AI bias monitoring and mitigation efforts.
    • Creates public transparency by requiring all AI bias monitoring reports to be posted online.

    Summary

    Senator Weber Pierson's artificial intelligence oversight measure establishes new requirements for AI systems used in clinical decisionmaking and healthcare resource allocation, requiring developers and deployers to identify and address potential bias in these systems.

    The legislation creates distinct obligations for entities that develop and deploy healthcare AI systems. Developers must assess their systems for potential bias before making them commercially available, while healthcare facilities and medical practices using these systems must conduct regular monitoring and take steps to mitigate any bias detected. Beginning January 1, 2027, developers must submit compliance reports to the State Department of Public Health before releasing new systems or substantial updates, while deployers must file annual reports documenting their monitoring efforts.

    The measure defines bias as unintended adverse impacts on individuals' healthcare access, quality, or outcomes based on protected characteristics under state law. While the Department of Public Health will maintain a public database of compliance reports, it is not required to independently evaluate AI systems. The legislation operates alongside existing state regulations on AI in healthcare, including current requirements for disclosure of AI-generated patient communications.

    Key Dates

    Next Step
    Assembly Floor
    Next Step
    Assembly Committee
    Assembly Floor
    Hearing has not been scheduled yet
    Assembly Appropriations Hearing
    Assembly Committee
    Assembly Appropriations Hearing
    Do pass
    Assembly Privacy And Consumer Protection Hearing
    Assembly Committee
    Assembly Privacy And Consumer Protection Hearing
    Do pass as amended and be re-referred to the Committee on [Appropriations]
    Assembly Health Hearing
    Assembly Committee
    Assembly Health Hearing
    Do pass as amended and be re-referred to the Committee on [Privacy and Consumer Protection]
    Vote on Senate Floor
    Senate Floor
    Vote on Senate Floor
    Special Consent SB503 Weber Pierson et al
    Senate Appropriations Hearing
    Senate Committee
    Senate Appropriations Hearing
    Do pass
    Senate Appropriations Hearing
    Senate Committee
    Senate Appropriations Hearing
    Placed on suspense file
    Senate Judiciary Hearing
    Senate Committee
    Senate Judiciary Hearing
    Do pass, but first be re-referred to the Committee on [Appropriations]
    Senate Health Hearing
    Senate Committee
    Senate Health Hearing
    Do pass as amended, but first amend, and re-refer to the Committee on [Governmental Organization]
    Introduced
    Senate Floor
    Introduced
    Introduced. Read first time. To Com. on RLS. for assignment. To print.

    Contacts

    Profile
    Al MuratsuchiD
    Assemblymember
    Floor Vote
    Not Contacted
    Not Contacted
    Profile
    Sharon Quirk-SilvaD
    Assemblymember
    Floor Vote
    Not Contacted
    Not Contacted
    Profile
    James GallagherR
    Assemblymember
    Floor Vote
    Not Contacted
    Not Contacted
    Profile
    Mike GipsonD
    Assemblymember
    Bill Author
    Not Contacted
    Not Contacted
    Profile
    Jacqui IrwinD
    Assemblymember
    Floor Vote
    Not Contacted
    Not Contacted
    0 of 83 row(s) selected.
    Page 1 of 17
    Select All Legislators
    Profile
    Al MuratsuchiD
    Assemblymember
    Floor Vote
    Profile
    Sharon Quirk-SilvaD
    Assemblymember
    Floor Vote
    Profile
    James GallagherR
    Assemblymember
    Floor Vote
    Profile
    Mike GipsonD
    Assemblymember
    Bill Author
    Profile
    Jacqui IrwinD
    Assemblymember
    Floor Vote
    Profile
    Tom LackeyR
    Assemblymember
    Floor Vote
    Profile
    Ash KalraD
    Assemblymember
    Floor Vote
    Profile
    Phillip ChenR
    Assemblymember
    Floor Vote
    Profile
    Cecilia Aguiar-CurryD
    Assemblymember
    Floor Vote
    Profile
    Heath FloraR
    Assemblymember
    Floor Vote
    Profile
    Marc BermanD
    Assemblymember
    Floor Vote
    Profile
    Blanca RubioD
    Assemblymember
    Floor Vote
    Profile
    Joaquin ArambulaD
    Assemblymember
    Floor Vote
    Profile
    Jesse GabrielD
    Assemblymember
    Floor Vote
    Profile
    Rebecca Bauer-KahanD
    Assemblymember
    Floor Vote
    Profile
    Tasha Boerner HorvathD
    Assemblymember
    Floor Vote
    Profile
    Cottie Petrie-NorrisD
    Assemblymember
    Floor Vote
    Profile
    James RamosD
    Assemblymember
    Floor Vote
    Profile
    Robert RivasD
    Assemblymember
    Floor Vote
    Profile
    Buffy WicksD
    Assemblymember
    Floor Vote
    Profile
    Steve BennettD
    Assemblymember
    Floor Vote
    Profile
    Laurie DaviesR
    Assemblymember
    Floor Vote
    Profile
    Alex LeeD
    Assemblymember
    Floor Vote
    Profile
    Chris WardD
    Assemblymember
    Floor Vote
    Profile
    Lisa CalderonD
    Assemblymember
    Floor Vote
    Profile
    Akilah Weber PiersonD
    Senator
    Bill Author
    Profile
    Isaac BryanD
    Assemblymember
    Bill Author
    Profile
    Mia BontaD
    Assemblymember
    Bill Author
    Profile
    Mike FongD
    Assemblymember
    Floor Vote
    Profile
    Lori WilsonD
    Assemblymember
    Bill Author
    Profile
    Matt HaneyD
    Assemblymember
    Floor Vote
    Profile
    David AlvarezD
    Assemblymember
    Floor Vote
    Profile
    Tina McKinnorD
    Assemblymember
    Bill Author
    Profile
    Dawn AddisD
    Assemblymember
    Floor Vote
    Profile
    Juan AlanisR
    Assemblymember
    Floor Vote
    Profile
    Jasmeet BainsD
    Assemblymember
    Floor Vote
    Profile
    Damon ConnollyD
    Assemblymember
    Floor Vote
    Profile
    Diane DixonR
    Assemblymember
    Floor Vote
    Profile
    Bill EssayliR
    Assemblymember
    Floor Vote
    Profile
    Gregg HartD
    Assemblymember
    Floor Vote
    Profile
    Josh HooverR
    Assemblymember
    Floor Vote
    Profile
    Corey JacksonD
    Assemblymember
    Bill Author
    Profile
    Joe PattersonR
    Assemblymember
    Floor Vote
    Profile
    Juan CarrilloD
    Assemblymember
    Floor Vote
    Profile
    Josh LowenthalD
    Assemblymember
    Floor Vote
    Profile
    Liz OrtegaD
    Assemblymember
    Floor Vote
    Profile
    Blanca PachecoD
    Assemblymember
    Floor Vote
    Profile
    Diane PapanD
    Assemblymember
    Floor Vote
    Profile
    Gail PellerinD
    Assemblymember
    Floor Vote
    Profile
    Kate SanchezR
    Assemblymember
    Floor Vote
    Profile
    Pilar SchiavoD
    Assemblymember
    Floor Vote
    Profile
    Esmeralda SoriaD
    Assemblymember
    Floor Vote
    Profile
    Stephanie NguyenD
    Assemblymember
    Floor Vote
    Profile
    Tri TaR
    Assemblymember
    Floor Vote
    Profile
    Avelino ValenciaD
    Assemblymember
    Floor Vote
    Profile
    Rick ZburD
    Assemblymember
    Floor Vote
    Profile
    Lola Smallwood-CuevasD
    Senator
    Bill Author
    Profile
    Greg WallisR
    Assemblymember
    Floor Vote
    Profile
    Patrick AhrensD
    Assemblymember
    Floor Vote
    Profile
    Jessica CalozaD
    Assemblymember
    Floor Vote
    Profile
    Leticia CastilloR
    Assemblymember
    Floor Vote
    Profile
    Carl DeMaioR
    Assemblymember
    Floor Vote
    Profile
    Anamarie FariasD
    Assemblymember
    Floor Vote
    Profile
    Robert GarciaD
    Assemblymember
    Floor Vote
    Profile
    Jeff GonzalezR
    Assemblymember
    Floor Vote
    Profile
    Mark GonzalezD
    Assemblymember
    Floor Vote
    Profile
    Heather HadwickR
    Assemblymember
    Floor Vote
    Profile
    John HarabedianD
    Assemblymember
    Floor Vote
    Profile
    Maggy KrellD
    Assemblymember
    Floor Vote
    Profile
    Alexandra MacedoR
    Assemblymember
    Floor Vote
    Profile
    Darshana PatelD
    Assemblymember
    Floor Vote
    Profile
    Rhodesia RansomD
    Assemblymember
    Bill Author
    Profile
    Celeste RodriguezD
    Assemblymember
    Floor Vote
    Profile
    Michelle RodriguezD
    Assemblymember
    Floor Vote
    Profile
    Chris RogersD
    Assemblymember
    Floor Vote
    Profile
    Nick SchultzD
    Assemblymember
    Floor Vote
    Profile
    LaShae Sharp-CollinsD
    Assemblymember
    Bill Author
    Profile
    Jose SolacheD
    Assemblymember
    Floor Vote
    Profile
    Catherine StefaniD
    Assemblymember
    Floor Vote
    Profile
    David TangipaR
    Assemblymember
    Floor Vote
    Profile
    Laura RichardsonD
    Senator
    Bill Author
    Profile
    Sade ElhawaryD
    Assemblymember
    Bill Author
    Profile
    Stan EllisR
    Assemblymember
    Floor Vote

    Get Involved

    Act Now!

    Email the authors or create an email template to send to all relevant legislators.

    Introduced By

    Akilah Weber Pierson
    Akilah Weber PiersonD
    California State Senator
    Co-Authors
    Lori Wilson
    Lori WilsonD
    California State Assembly Member
    Lola Smallwood-Cuevas
    Lola Smallwood-CuevasD
    California State Senator
    LaShae Sharp-Collins
    LaShae Sharp-CollinsD
    California State Assembly Member
    Laura Richardson
    Laura RichardsonD
    California State Senator
    Rhodesia Ransom
    Rhodesia RansomD
    California State Assembly Member
    Tina McKinnor
    Tina McKinnorD
    California State Assembly Member
    Corey Jackson
    Corey JacksonD
    California State Assembly Member
    Mike Gipson
    Mike GipsonD
    California State Assembly Member
    Sade Elhawary
    Sade ElhawaryD
    California State Assembly Member
    Isaac Bryan
    Isaac BryanD
    California State Assembly Member
    Mia Bonta
    Mia BontaD
    California State Assembly Member
    40% progression
    Bill has passed all readings in its first house and is ready to move to the other house (5/29/2025)

    Latest Voting History

    View History
    August 29, 2025
    PASS
    Assembly Committee
    Assembly Appropriations Hearing
    AyesNoesNVRTotalResult
    150015PASS

    Key Takeaways

    • Requires healthcare AI systems to be monitored and tested for bias in clinical decisions and resource allocation.
    • Mandates developers to report bias prevention efforts before releasing healthcare AI systems starting January 2027.
    • Requires healthcare facilities to submit annual reports on their AI bias monitoring and mitigation efforts.
    • Creates public transparency by requiring all AI bias monitoring reports to be posted online.

    Get Involved

    Act Now!

    Email the authors or create an email template to send to all relevant legislators.

    Introduced By

    Akilah Weber Pierson
    Akilah Weber PiersonD
    California State Senator
    Co-Authors
    Lori Wilson
    Lori WilsonD
    California State Assembly Member
    Lola Smallwood-Cuevas
    Lola Smallwood-CuevasD
    California State Senator
    LaShae Sharp-Collins
    LaShae Sharp-CollinsD
    California State Assembly Member
    Laura Richardson
    Laura RichardsonD
    California State Senator
    Rhodesia Ransom
    Rhodesia RansomD
    California State Assembly Member
    Tina McKinnor
    Tina McKinnorD
    California State Assembly Member
    Corey Jackson
    Corey JacksonD
    California State Assembly Member
    Mike Gipson
    Mike GipsonD
    California State Assembly Member
    Sade Elhawary
    Sade ElhawaryD
    California State Assembly Member
    Isaac Bryan
    Isaac BryanD
    California State Assembly Member
    Mia Bonta
    Mia BontaD
    California State Assembly Member

    Summary

    Senator Weber Pierson's artificial intelligence oversight measure establishes new requirements for AI systems used in clinical decisionmaking and healthcare resource allocation, requiring developers and deployers to identify and address potential bias in these systems.

    The legislation creates distinct obligations for entities that develop and deploy healthcare AI systems. Developers must assess their systems for potential bias before making them commercially available, while healthcare facilities and medical practices using these systems must conduct regular monitoring and take steps to mitigate any bias detected. Beginning January 1, 2027, developers must submit compliance reports to the State Department of Public Health before releasing new systems or substantial updates, while deployers must file annual reports documenting their monitoring efforts.

    The measure defines bias as unintended adverse impacts on individuals' healthcare access, quality, or outcomes based on protected characteristics under state law. While the Department of Public Health will maintain a public database of compliance reports, it is not required to independently evaluate AI systems. The legislation operates alongside existing state regulations on AI in healthcare, including current requirements for disclosure of AI-generated patient communications.

    40% progression
    Bill has passed all readings in its first house and is ready to move to the other house (5/29/2025)

    Key Dates

    Next Step
    Assembly Floor
    Next Step
    Assembly Committee
    Assembly Floor
    Hearing has not been scheduled yet
    Assembly Appropriations Hearing
    Assembly Committee
    Assembly Appropriations Hearing
    Do pass
    Assembly Privacy And Consumer Protection Hearing
    Assembly Committee
    Assembly Privacy And Consumer Protection Hearing
    Do pass as amended and be re-referred to the Committee on [Appropriations]
    Assembly Health Hearing
    Assembly Committee
    Assembly Health Hearing
    Do pass as amended and be re-referred to the Committee on [Privacy and Consumer Protection]
    Vote on Senate Floor
    Senate Floor
    Vote on Senate Floor
    Special Consent SB503 Weber Pierson et al
    Senate Appropriations Hearing
    Senate Committee
    Senate Appropriations Hearing
    Do pass
    Senate Appropriations Hearing
    Senate Committee
    Senate Appropriations Hearing
    Placed on suspense file
    Senate Judiciary Hearing
    Senate Committee
    Senate Judiciary Hearing
    Do pass, but first be re-referred to the Committee on [Appropriations]
    Senate Health Hearing
    Senate Committee
    Senate Health Hearing
    Do pass as amended, but first amend, and re-refer to the Committee on [Governmental Organization]
    Introduced
    Senate Floor
    Introduced
    Introduced. Read first time. To Com. on RLS. for assignment. To print.

    Latest Voting History

    View History
    August 29, 2025
    PASS
    Assembly Committee
    Assembly Appropriations Hearing
    AyesNoesNVRTotalResult
    150015PASS

    Contacts

    Profile
    Al MuratsuchiD
    Assemblymember
    Floor Vote
    Not Contacted
    Not Contacted
    Profile
    Sharon Quirk-SilvaD
    Assemblymember
    Floor Vote
    Not Contacted
    Not Contacted
    Profile
    James GallagherR
    Assemblymember
    Floor Vote
    Not Contacted
    Not Contacted
    Profile
    Mike GipsonD
    Assemblymember
    Bill Author
    Not Contacted
    Not Contacted
    Profile
    Jacqui IrwinD
    Assemblymember
    Floor Vote
    Not Contacted
    Not Contacted
    0 of 83 row(s) selected.
    Page 1 of 17
    Select All Legislators
    Profile
    Al MuratsuchiD
    Assemblymember
    Floor Vote
    Profile
    Sharon Quirk-SilvaD
    Assemblymember
    Floor Vote
    Profile
    James GallagherR
    Assemblymember
    Floor Vote
    Profile
    Mike GipsonD
    Assemblymember
    Bill Author
    Profile
    Jacqui IrwinD
    Assemblymember
    Floor Vote
    Profile
    Tom LackeyR
    Assemblymember
    Floor Vote
    Profile
    Ash KalraD
    Assemblymember
    Floor Vote
    Profile
    Phillip ChenR
    Assemblymember
    Floor Vote
    Profile
    Cecilia Aguiar-CurryD
    Assemblymember
    Floor Vote
    Profile
    Heath FloraR
    Assemblymember
    Floor Vote
    Profile
    Marc BermanD
    Assemblymember
    Floor Vote
    Profile
    Blanca RubioD
    Assemblymember
    Floor Vote
    Profile
    Joaquin ArambulaD
    Assemblymember
    Floor Vote
    Profile
    Jesse GabrielD
    Assemblymember
    Floor Vote
    Profile
    Rebecca Bauer-KahanD
    Assemblymember
    Floor Vote
    Profile
    Tasha Boerner HorvathD
    Assemblymember
    Floor Vote
    Profile
    Cottie Petrie-NorrisD
    Assemblymember
    Floor Vote
    Profile
    James RamosD
    Assemblymember
    Floor Vote
    Profile
    Robert RivasD
    Assemblymember
    Floor Vote
    Profile
    Buffy WicksD
    Assemblymember
    Floor Vote
    Profile
    Steve BennettD
    Assemblymember
    Floor Vote
    Profile
    Laurie DaviesR
    Assemblymember
    Floor Vote
    Profile
    Alex LeeD
    Assemblymember
    Floor Vote
    Profile
    Chris WardD
    Assemblymember
    Floor Vote
    Profile
    Lisa CalderonD
    Assemblymember
    Floor Vote
    Profile
    Akilah Weber PiersonD
    Senator
    Bill Author
    Profile
    Isaac BryanD
    Assemblymember
    Bill Author
    Profile
    Mia BontaD
    Assemblymember
    Bill Author
    Profile
    Mike FongD
    Assemblymember
    Floor Vote
    Profile
    Lori WilsonD
    Assemblymember
    Bill Author
    Profile
    Matt HaneyD
    Assemblymember
    Floor Vote
    Profile
    David AlvarezD
    Assemblymember
    Floor Vote
    Profile
    Tina McKinnorD
    Assemblymember
    Bill Author
    Profile
    Dawn AddisD
    Assemblymember
    Floor Vote
    Profile
    Juan AlanisR
    Assemblymember
    Floor Vote
    Profile
    Jasmeet BainsD
    Assemblymember
    Floor Vote
    Profile
    Damon ConnollyD
    Assemblymember
    Floor Vote
    Profile
    Diane DixonR
    Assemblymember
    Floor Vote
    Profile
    Bill EssayliR
    Assemblymember
    Floor Vote
    Profile
    Gregg HartD
    Assemblymember
    Floor Vote
    Profile
    Josh HooverR
    Assemblymember
    Floor Vote
    Profile
    Corey JacksonD
    Assemblymember
    Bill Author
    Profile
    Joe PattersonR
    Assemblymember
    Floor Vote
    Profile
    Juan CarrilloD
    Assemblymember
    Floor Vote
    Profile
    Josh LowenthalD
    Assemblymember
    Floor Vote
    Profile
    Liz OrtegaD
    Assemblymember
    Floor Vote
    Profile
    Blanca PachecoD
    Assemblymember
    Floor Vote
    Profile
    Diane PapanD
    Assemblymember
    Floor Vote
    Profile
    Gail PellerinD
    Assemblymember
    Floor Vote
    Profile
    Kate SanchezR
    Assemblymember
    Floor Vote
    Profile
    Pilar SchiavoD
    Assemblymember
    Floor Vote
    Profile
    Esmeralda SoriaD
    Assemblymember
    Floor Vote
    Profile
    Stephanie NguyenD
    Assemblymember
    Floor Vote
    Profile
    Tri TaR
    Assemblymember
    Floor Vote
    Profile
    Avelino ValenciaD
    Assemblymember
    Floor Vote
    Profile
    Rick ZburD
    Assemblymember
    Floor Vote
    Profile
    Lola Smallwood-CuevasD
    Senator
    Bill Author
    Profile
    Greg WallisR
    Assemblymember
    Floor Vote
    Profile
    Patrick AhrensD
    Assemblymember
    Floor Vote
    Profile
    Jessica CalozaD
    Assemblymember
    Floor Vote
    Profile
    Leticia CastilloR
    Assemblymember
    Floor Vote
    Profile
    Carl DeMaioR
    Assemblymember
    Floor Vote
    Profile
    Anamarie FariasD
    Assemblymember
    Floor Vote
    Profile
    Robert GarciaD
    Assemblymember
    Floor Vote
    Profile
    Jeff GonzalezR
    Assemblymember
    Floor Vote
    Profile
    Mark GonzalezD
    Assemblymember
    Floor Vote
    Profile
    Heather HadwickR
    Assemblymember
    Floor Vote
    Profile
    John HarabedianD
    Assemblymember
    Floor Vote
    Profile
    Maggy KrellD
    Assemblymember
    Floor Vote
    Profile
    Alexandra MacedoR
    Assemblymember
    Floor Vote
    Profile
    Darshana PatelD
    Assemblymember
    Floor Vote
    Profile
    Rhodesia RansomD
    Assemblymember
    Bill Author
    Profile
    Celeste RodriguezD
    Assemblymember
    Floor Vote
    Profile
    Michelle RodriguezD
    Assemblymember
    Floor Vote
    Profile
    Chris RogersD
    Assemblymember
    Floor Vote
    Profile
    Nick SchultzD
    Assemblymember
    Floor Vote
    Profile
    LaShae Sharp-CollinsD
    Assemblymember
    Bill Author
    Profile
    Jose SolacheD
    Assemblymember
    Floor Vote
    Profile
    Catherine StefaniD
    Assemblymember
    Floor Vote
    Profile
    David TangipaR
    Assemblymember
    Floor Vote
    Profile
    Laura RichardsonD
    Senator
    Bill Author
    Profile
    Sade ElhawaryD
    Assemblymember
    Bill Author
    Profile
    Stan EllisR
    Assemblymember
    Floor Vote