Health: medical examiners; requirements for an investigation of the cause and manner of death; modify. Amends secs. 2 & 3 of 1953 PA 181 (MCL 52.202 & 52.203). TIE BAR WITH: HB 4077'25
HB 4078 amends Michigan's Medical Examiner Act to update when county medical examiners must investigate deaths and who must report suspicious or unexpected deaths. It requires investigations for deaths by violence, unexpected deaths, deaths without medical care (with specific hospice care exceptions), and abortion-related deaths. The bill also clarifies that hospitals, physicians, or others must immediately report such deaths to medical examiners, including cases involving multiple similar individuals in one incident. Medical records obtained during these investigations are exempt from public disclosure under Michigan's Freedom of Information Act.
Bill status
signed
all 5 stages cleared
Introduction
Feb 2025
Committee Review
Feb 2026
House Passage
Apr 2025
Senate Passage
Mar 2026
Signed into Law
Mar 2026
Introduced Feb 12, 2025
Signed Mar 18, 2026
Maddy AI version diff · 3 comparisons
What changed between versions
As Passed by the Senate
→
House Concurred Bill
·
2 edits
MINOR
The bill was reformatted for the House version, removing page headers and footers while keeping the core text intact. The substantive policy requirements, such as when medical examiners must investigate deaths and how notifications are handled, remain unchanged.
Scope change
No change in scope or applicability; the bill covers the same subjects and applies to the same entities as before.
TECHNICAL
Removed page headers, footers, and line numbers that were present in the Senate version but are not part of the actual law.
Adjusted line breaks and spacing to fit the House bill format without altering the legal meaning of the text.
Floor votes · Senate Mar 4, 2026 · House Apr 22, 2025
How they voted
37–0
Passed · 1 other
Total votes 38
Mar 4, 2026
D
Democratic19
94% Yea
R
Republican19
100% Yea
Vote distribution
All Yea
All Nay
Mixed
No data
Full legislative history
Actions timeline
Total actions
26
Key actions
7
Committee
7
Amendments
1
Mar 18, 2026
Introduced
filed with Secretary of State 03/17/2026 01:17 PM
lower
Mar 18, 2026
Signed into law
approved by the Governor 03/17/2026 10:32 AM
lower
Mar 5, 2026
Introduced
returned from Senate without amendment with immediate effect
lower
Mar 4, 2026
Upper · Passed
PASSED; GIVEN IMMEDIATE EFFECT ROLL CALL # 20 YEAS 36 NAYS 0 EXCUSED 1 NOT VOTING 0
upper
Feb 18, 2026
Upper · Passed
REPORTED BY COMMITTEE OF THE WHOLE FAVORABLY WITHOUT AMENDMENT(S)
upper
Nov 13, 2025
Committee
REFERRED TO COMMITTEE OF THE WHOLE
upper
Nov 13, 2025
Upper · Passed
REPORTED FAVORABLY WITHOUT AMENDMENT 11/12/2025
upper
Apr 29, 2025
Committee
REFERRED TO COMMITTEE ON HEALTH POLICY
upper
Apr 29, 2025
Upper · Passed
PASSED BY HOUSE WITH IMMEDIATE EFFECT
upper
Apr 22, 2025
Lower · Passed
passed; given immediate effect Roll Call #58 Yeas 106 Nays 2 Excused 0 Not Voting 2
lower
Mar 12, 2025
Committee
referred to second reading
lower
Mar 12, 2025
Lower · Passed
reported with recommendation without amendment
lower
Feb 12, 2025
Committee
referred to Committee on Health Policy
lower
Feb 12, 2025
Introduced
introduced by Representative Rep. Mike Mueller
lower
1 primary · 19 co-sponsors
Sponsors
Role
Legislator
Party
State
District
P
Mike Mueller
RRepublican
Co
Carol Glanville
DDemocratic
Co
Carrie Rheingans
DDemocratic
Co
Curt VanderWall
RRepublican
Co
Cynthia Neeley
DDemocratic
Co
Donavan McKinney
DDemocratic
Co
Doug Wozniak
RRepublican
Co
Erin Byrnes
DDemocratic
Co
Jason Hoskins
DDemocratic
Co
Jason Morgan
DDemocratic
Co
Jennifer Conlin
DDemocratic
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