AB 104 Wisconsin Assembly · 2025-2026 Regular Session

Relating to: prohibiting gender transition medical intervention for individuals under 18 years of age.

AB 104 prohibits health care providers from performing or referring minors under 18 for medical interventions intended to change their physical characteristics to match a gender different from their biological sex. It specifically bans surgeries (like hysterectomy or orchiectomy), mastectomies, puberty-blocking drugs, and high-dose cross-sex hormone treatments. Exceptions apply for genetic disorders of sex development, treating complications from prior procedures, or immediate life-threatening conditions. Violations could result in license revocation for health care providers by the licensing board.

Issues: ✗ Healthcare

Bill status vetoed 4 of 5 stages cleared

Introduction

Mar 2025

Committee Review

Jan 2026

Assembly Passage

Mar 2025

Senate Passage

Feb 2026

Vetoed

Mar 2026

Introduced Mar 5, 2025 Vetoed Mar 31, 2026

Maddy AI version diff · 1 comparison

What changed between versions

Bill Text → Text as Enrolled · 3 edits

MINOR

This bill was converted from a draft proposal into an enacted law, adding specific dates and formalizing the text for official publication. The core policy prohibiting gender transition medical interventions for minors under 18 remains unchanged, including the specific list of banned procedures and medical exemptions for sex development disorders.

Scope change

The bill's substantive scope and applicability are unchanged; the text was formalized from a draft bill into an official act.

TECHNICAL

Added a formal 'Date of enactment' and 'Date of publication' header to establish the official legal timeline and publication status.

Reorganized the text structure from a draft bill format to the standard '2025 Wisconsin Act' format required for enacted legislation.

Adjusted section references and numbering to align with the final enrolled version of the law.

Floor votes · Assembly Mar 20, 2025

How they voted

This bill passed the Senate by voice vote (no roll call recorded).

Full legislative history

Actions timeline

Total actions

Key actions

Committee

Mar 31, 2026

Vetoed

Report vetoed by the Governor on 3-31-2026

lower

Feb 11, 2026

Upper · Passed

Read a third time and concurred in, Ayes 18, Noes 15

upper

Jan 16, 2026

Upper · Passed

Report concurrence recommended by Committee on Government Operations, Labor and Economic Development, Ayes 3, Noes 2

upper

Mar 20, 2025

Lower · Passed

Read a third time and passed, Ayes 50, Noes 43

lower

Mar 18, 2025

Lower · Passed

Placed on calendar 3-20-2025 by Committee on Rules

lower

Mar 13, 2025

Committee

Referred to committee on Rules

lower

Mar 13, 2025

Lower · Passed

Report passage recommended by Committee on Health, Aging and Long-Term Care, Ayes 10, Noes 5

lower

Mar 5, 2025

Introduced

Introduced by Representatives Allen, Vos, Behnke, Brill, Brooks, Callahan, Dittrich, Goeben, Green, Gundrum, Hurd, B. Jacobson, Knodl, Kreibich, Maxey, Murphy, Mursau, Nedweski, Neylon, O'Connor, Penterman, Steffen, Tucker, Tusler and Wichgers; cosponsored by Senators Tomczyk, Kapenga, Nass, Quinn and Wimberger

lower

25 primary · 0 co-sponsors