Bill > HB4190

This bill prohibits physicians from performing gender reassignment surgeries or prescribing cross-sex hormones and puberty-blocking drugs to minors, with a narrow exception for patients who were already receiving such treatments before the law's effective date. Specifically, the bill defines these medical interventions in detailed terms, including genital and non-genital surgeries and hormonal treatments that alter characteristics typical of a minor's biological sex. The law defines "biological sex" as the physical characteristics present at birth, including chromosomes, hormones, and genitalia, without regard to an individual's gender identity. Physicians who have already initiated a treatment course for a minor prior to the law's implementation may continue that treatment only if they have documented that stopping the treatment would cause harm to the minor. The bill also includes a companion section requiring physicians to comply with these new restrictions. The legislation aims to prevent medical professionals from providing gender transition-related medical interventions to individuals under 18 years old, based on the perspective that such treatments are inappropriate for minors.

Health and Social Services

https://legislature.mi.gov/Bills/Bill?ObjectName=2025-HB-4190