Assembly Bill 400
A civil cause of action for a minor injured by a gender transition procedure
Topics: Court: Procedure, Damage (personal injury), Medical service, Mental health, Physician, Youth
Stopped before the full Assembly voted
The recommended passing it, but the full Assembly never voted on it. The last day for votes this session was Mar 19, 2026. To try again, a lawmaker would have to start a new bill.
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Introduced, passed
Aug 29, 2025
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Committee, passed
Approved
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Assembly vote, stopped here
Stopped here. The full Assembly never voted on it.
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Senate vote, not reached
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Governor, not reached
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Law, not reached
Latest entry in the official record, Mar 23, 2026: “Failed to pass pursuant to ”
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The same bill was also filed in the Senate as SB 405. That version was vetoed.
Terms on this page
Committee
A small group of lawmakers that looks at a bill first. Most bills never leave committee.
Senate Joint Resolution 1
The session's calendar. Any bill not passed by its last voting day dies.
Official term: Failed to pass pursuant to SJR 1. More in the glossary
Legislative Reference Bureau
The Legislature's nonpartisan office that drafts bills and writes the summary at the top of each one.
Official term: LRB analysis. More in the glossary
Author
A lawmaker who formally puts a bill forward. The text itself is drafted by the Legislative Reference Bureau.
Official term: Author, coauthor. More in the glossary
Signed on in support
Lawmakers who back a bill without being one of its authors, often from the other chamber.
Official term: Cosponsor. More in the glossary
Roll call
A vote where each lawmaker's yes or no is recorded by name.
Official term: Roll call vote. More in the glossary
What it would have done
Summary by the , the Legislature's nonpartisan drafting office. It's their wording, not ours.
This bill establishes a civil cause of action against a health care provider who performs a gender transition procedure, as defined in the bill, on an individual who is under 18 years of age and who is injured, including any physical, psychological, emotional, or physiological injury, by the gender transition procedure or related treatment or the aftereffects of the gender transition procedure or related treatment. Under the bill, such an action must be commenced before the individual attains the age of 33 years.
The bill provides that it is a defense to an action under the bill if all of the following occur before a health care provider performs a gender transition procedure on an individual who is under 18 years of age:
Read the full summary Show less
1. The health care provider documents the individual’s perceived gender or perceived sex for at least two continuous years, and the individual’s perceived gender or perceived sex is invariably inconsistent with the individual’s biological sex throughout the two-year period.
2. To the extent that the individual suffers from a mental health concern, at least one mental health professional and one other health care provider certifies in writing that the gender transition procedure is the only way to treat the mental health concern.
3. At least one mental health professional and one other health care provider certifies in writing that the individual suffers from no other mental health concerns.
4. The health care provider receives the voluntary and informed consent of the individual and the individual’s parent or legal guardian by providing them, both orally and in writing, with a notice, the contents are which are prescribed in the bill, at least 30 days before the first treatment of the gender transition procedure and during every subsequent medical visit for treatment during the following six months.
Who's behind it
16 representatives are its . All 16 are Republicans.
4 more lawmakers .
See all 20 names Hide the names
Authors (16)
- Scott Allen · Republican, Assembly
- Elijah Behnke · Republican, Assembly
- Lindee Brill · Republican, Assembly
- Barbara Dittrich · Republican, Assembly
- Chanz Green · Republican, Assembly
- Dan Knodl · Republican, Assembly
- Rob Kreibich · Republican, Assembly
- Dave Maxey · Republican, Assembly
- Dave Murphy · Republican, Assembly
- Jeff Mursau · Republican, Assembly
- Amanda Nedweski · Republican, Assembly
- Jerry O'Connor · Republican, Assembly
- Will Penterman · Republican, Assembly
- Jim Piwowarczyk · Republican, Assembly
- David Steffen · Republican, Assembly
- Chuck Wichgers · Republican, Assembly
Signed on in support (4)
- Julian Bradley · Republican, Senate
- Rob Hutton · Republican, Senate
- Chris Kapenga · Republican, Senate
- Steve Nass · Republican, Senate
Versions and amendments
Every text the Legislature printed for this bill, including proposed changes. Each opens on the Legislature's site.
How lawmakers voted
There was one vote on this bill.
Assembly Committee on Judiciary vote to recommend it
Passed, 5 to 3 · Jan 15, 2026
No member-by-member record exists for this vote. Committee votes and some older sessions record totals only.
Official motion: “Report passage recommended by Committee on Judiciary, Ayes 5, Noes 3”. Official record · This vote on its own page
What happened
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Mar 23, 2026
The session ended, and the bill died with it.
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Jan 15, 2026
Sent to the Assembly Committee on Rules.
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Jan 15, 2026
The committee voted to recommend passing it, 5 to 3.
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Jan 8, 2026
The committee held a public hearing.
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Aug 29, 2025
Sent to the Assembly Committee on Judiciary.
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Aug 29, 2025
Introduced in the Assembly.
See the official record, word for word Hide the official record
- Aug 29, 2025 · Assembly
Introduced by Representatives Nedweski, Steffen, Allen, Behnke, Brill, Dittrich, Green, Knodl, Kreibich, Maxey, Murphy, Mursau, O'Connor, Penterman, Piwowarczyk and Wichgers; cosponsored by Senators Hutton, Kapenga, Bradley and Nass
- Aug 29, 2025 · Assembly
Read first time and referred to Committee on Judiciary
- Jan 8, 2026 · Assembly
Public hearing held
- Jan 14, 2026 · Assembly
Executive action taken
- Jan 15, 2026 · Assembly
Report passage recommended by Committee on Judiciary, Ayes 5, Noes 3
- Jan 15, 2026 · Assembly
Referred to committee on Rules
- Feb 10, 2026 · Assembly
Placed on calendar 2-12-2026 by Committee on Rules
- Feb 11, 2026 · Assembly
Assembly Amendment 1 offered by Representative Nedweski
- Feb 12, 2026 · Assembly
Laid on the table
- Mar 23, 2026 · Assembly
Failed to pass pursuant to Senate Joint Resolution 1
Terms on this page
Committee
A small group of lawmakers that looks at a bill first. Most bills never leave committee.
Senate Joint Resolution 1
The session's calendar. Any bill not passed by its last voting day dies.
Official term: Failed to pass pursuant to SJR 1. More in the glossary
Legislative Reference Bureau
The Legislature's nonpartisan office that drafts bills and writes the summary at the top of each one.
Official term: LRB analysis. More in the glossary
Author
A lawmaker who formally puts a bill forward. The text itself is drafted by the Legislative Reference Bureau.
Official term: Author, coauthor. More in the glossary
Signed on in support
Lawmakers who back a bill without being one of its authors, often from the other chamber.
Official term: Cosponsor. More in the glossary
Roll call
A vote where each lawmaker's yes or no is recorded by name.
Official term: Roll call vote. More in the glossary
From the Wisconsin Legislature's official record, checked Sep 15, 2026. See the source
Committee
A small group of lawmakers that looks at a bill first. Most bills never leave committee.
Senate Joint Resolution 1
The session's calendar. Any bill not passed by its last voting day dies.
Official term: Failed to pass pursuant to SJR 1
Legislative Reference Bureau
The Legislature's nonpartisan office that drafts bills and writes the summary at the top of each one.
Official term: LRB analysis
Signed on in support
Lawmakers who back a bill without being one of its authors, often from the other chamber.
Official term: Cosponsor
Roll call
A vote where each lawmaker's yes or no is recorded by name.
Official term: Roll call vote