---
type: "Bill"
title: "Insurance: health insurers; minimum required coverage; provide for. Amends 1956 PA 218 (MCL 500.100 - 500.8302) by adding sec. 3406bb."
description: "Insurance: health insurers; minimum required coverage; provide for. Amends 1956 PA 218 (MCL 500.100 - 500.8302) by adding sec. 3406bb."
jurisdiction: "us/states/mi"
legislature: "Michigan Legislature"
session: "2023-2024"
identifier: "HB 4623"
citation: "Michigan HB 4623 (2023-2024)"
classification: ["bill"]
subjects: ["Insurance: health insurers", "State agencies (existing): insurance and financial services"]
status: "enacted"
primary_sponsors: ["Matt Koleszar"]
version_count: 8
action_count: 29
vote_count: 2
first_action: "2023-05-23"
last_action: "2023-10-24"
source: "openstates"
source_identifier: "ocd-bill/73a034c7-69cb-4528-bcbe-2d2ee7294b79"
source_url: "https://legislature.mi.gov/Bills/Bill?ObjectName=2023-HB-4623"
source_hash: "29bc07a1dbbe8fbb7854160e708d9e8fc066c7d745d8ff8488731c377f58232b"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-mi"]
---

# Michigan HB 4623 (2023-2024) — Insurance: health insurers; minimum required coverage; provide for. Amends 1956 PA 218 (MCL 500.100 - 500.8302) by adding sec. 3406bb.

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **As Passed by the House** (committee substitute) — [source](https://legislature.mi.gov/documents/2023-2024/billengrossed/House/pdf/2023-HEBH-4623.pdf)
2. **As Passed by the Senate** (committee substitute) — [source](https://legislature.mi.gov/documents/2023-2024/billengrossed/House/pdf/2023-HEBS-4623.pdf)
3. **House Concurred Bill** (committee substitute) — [source](https://legislature.mi.gov/documents/2023-2024/billconcurred/House/pdf/2023-HCB-4623.pdf)
4. **House Introduced Bill** (committee substitute) — [source](https://legislature.mi.gov/documents/2023-2024/billintroduced/House/pdf/2023-HIB-4623.pdf)
5. **Public Act** (committee substitute) — [source](https://legislature.mi.gov/documents/2023-2024/publicact/pdf/2023-PA-0160.pdf)
6. **Substitute (H-1)** (committee substitute) — [source](https://legislature.mi.gov/Home/GetObject?objectName=2023-HCVBS-4623-0N295.pdf)
7. **Substitute (H-1) - 2** (committee substitute) — [source](https://legislature.mi.gov/Home/GetObject?objectName=2023-HCVBS-4623-0O338.pdf)
8. **Substitute (H-2)** (committee substitute) — [source](https://legislature.mi.gov/Home/GetObject?objectName=2023-HCVBS-4623-0O339.pdf)

## Votes

- passed; given immediate effect Roll Call # 257 Yeas 59 Nays 49 Excused 0 Not Voting 2 — **59–49** (pass) · lower
- PASSED ROLL CALL # 511 YEAS 20 NAYS 18 EXCUSED 0 NOT VOTING 0 — **20–18** (pass) · upper

## Sponsors

- Matt Koleszar — primary (person)
- Abraham Aiyash — cosponsor (person)
- Alabas Farhat — cosponsor (person)
- Brenda Carter — cosponsor (person)
- Carrie Rheingans — cosponsor (person)
- Christine Morse — cosponsor (person)
- Donavan McKinney — cosponsor (person)
- Erin Byrnes — cosponsor (person)
- Jason Morgan — cosponsor (person)
- Jasper Martus — cosponsor (person)
- Jenn Hill — cosponsor (person)
- Jim Haadsma — cosponsor (person)
- Jimmie Wilson Jr. — cosponsor (person)
- Julie Brixie — cosponsor (person)
- Julie Rogers — cosponsor (person)
- Kara Hope — cosponsor (person)
- Kelly Breen — cosponsor (person)
- Mike McFall — cosponsor (person)
- Phil Green — cosponsor (person)
- Phil Skaggs — cosponsor (person)
- Rachel Hood — cosponsor (person)
- Ranjeev Puri — cosponsor (person)
- Reggie Miller — cosponsor (person)
- Samantha Steckloff — cosponsor (person)
- Tyrone Carter — cosponsor (person)
- Veronica Paiz — cosponsor (person)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2023-05-23** introduced by Representative Matt Koleszar `introduction`
- **2023-05-23** read a first time `reading-1`
- **2023-05-23** referred to Committee on Insurance and Financial Services `referral-committee`
- **2023-05-24** bill electronically reproduced 05/23/2023
- **2023-06-21** reported with recommendation with substitute (H-1) `committee-passage`
- **2023-06-21** referred to second reading
- **2023-06-28** read a second time `reading-2`
- **2023-06-28** substitute (H-1) adopted
- **2023-06-28** substitute (H-2) adopted
- **2023-06-28** placed on third reading
- **2023-06-28** placed on immediate passage
- **2023-06-28** read a third time `reading-3`
- **2023-06-28** passed; given immediate effect Roll Call # 257 Yeas 59 Nays 49 Excused 0 Not Voting 2 `passage`
- **2023-06-28** title amended
- **2023-06-28** transmitted
- **2023-06-28** REFERRED TO COMMITTEE ON HEALTH POLICY `referral-committee`
- **2023-09-28** REPORTED FAVORABLY WITHOUT AMENDMENT `committee-passage`
- **2023-09-28** REFERRED TO COMMITTEE OF THE WHOLE `referral-committee`
- **2023-10-05** REPORTED BY COMMITTEE OF THE WHOLE FAVORABLY WITHOUT AMENDMENT(S) `committee-passage`
- **2023-10-05** PLACED ON ORDER OF THIRD READING
- **2023-10-10** PASSED ROLL CALL # 511 YEAS 20 NAYS 18 EXCUSED 0 NOT VOTING 0 `passage`
- **2023-10-10** INSERTED FULL TITLE
- **2023-10-10** returned from Senate without amendment with full title
- **2023-10-10** full title agreed to
- **2023-10-10** bill ordered enrolled
- **2023-10-17** presented to the Governor 10/17/2023 09:29 AM `executive-receipt`
- **2023-10-24** approved by the Governor 10/19/2023 10:08 AM `executive-signature`
- **2023-10-24** filed with Secretary of State 10/19/2023 11:48 AM
- **2023-10-24** assigned PA 160'23

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/73a034c7-69cb-4528-bcbe-2d2ee7294b79`. Confidence: reported (aggregated from official Michigan legislature records).