---
type: "Bill"
title: "A bill for an act providing for the collaborative practice of physician assistants by allowing for the practice of certain physician assistants without supervision by a physician."
description: "A bill for an act providing for the collaborative practice of physician assistants by allowing for the practice of certain physician assistants without supervision by a physician."
jurisdiction: "us/states/ia"
legislature: "Iowa General Assembly"
session: "2023-2024"
identifier: "HF 424"
citation: "Iowa HF 424 (2023-2024)"
classification: ["bill"]
subjects: ["health-related professions", "medical care", "physician assisting", "professional licensure", "surgery"]
status: "enacted"
primary_sponsors: []
version_count: 7
action_count: 29
vote_count: 4
first_action: "2023-02-22"
last_action: "2023-05-10"
source: "openstates"
source_identifier: "ocd-bill/b1e0b371-d3f9-4307-8bbb-69c2568e64d8"
source_url: "https://www.legis.iowa.gov/legislation/billTracking/billHistory?billName=HF 424&ga=90"
source_hash: "9a3c019d6079f158eb56af171a80b3ea86ad1bce535e838da6c445ecf6fca9ba"
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-ia"]
---

# Iowa HF 424 (2023-2024) — A bill for an act providing for the collaborative practice of physician assistants by allowing for the practice of certain physician assistants without supervision by a physician.

## Version chain

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

1. **Introduced** (filed) — [source](https://www.legis.iowa.gov/docs/publications/LGI/90/attachments/HF424.html)
2. **Amendment H-1059** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/AMDI/90/H1059.pdf)
3. **Amendment H-1280** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/AMDI/90/H1280.pdf)
4. **Amendment S-3159** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/AMDI/90/S3159.pdf)
5. **Amendment S-3167** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/AMDI/90/S3167.pdf)
6. **Signed Enrolled Bill (PDF)** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/LGE/90/Attachments/HF424_GovLetter.pdf)
7. **Enrolled** (enrolled) — [source](https://www.legis.iowa.gov/docs/publications/LGE/90/attachments/HF424.html)

## Votes

- Shall the bill pass? — **90–8** (pass) · lower
- Shall the bill pass? — **48–1** (pass) · upper
- Shall amendment H-1059 be adopted? — **30–68** (fail) · lower
- Shall the bill pass? — **88–6** (pass) · lower

## Sponsors

- COMMITTEE ON HEALTH AND HUMAN SERVICES — primary (organization)

## Timeline

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

- **2023-02-22** Introduced, placed on calendar. `introduction`
- **2023-03-06** Amendment H-1059 filed. `amendment-introduction`
- **2023-03-07** Amendment H-1059, yeas 30, nays 68, lost.
- **2023-03-07** Passed House, yeas 90, nays 8. `passage`
- **2023-03-07** Immediate message.
- **2023-03-07** Message from House.
- **2023-03-07** Read first time, passed on file. `reading-1`
- **2023-03-08** Referred to State Government. `referral-committee`
- **2023-03-14** Subcommittee: Driscoll, Jochum, and Koelker.
- **2023-03-14** Subcommittee Meeting: 03/15/2023 3:30PM Room 217 Conference Room.
- **2023-03-16** Subcommittee recommends passage. []. `committee-passage-favorable`
- **2023-03-21** Committee report, recommending passage. `committee-passage`
- **2023-04-06** Placed on calendar under unfinished business.
- **2023-04-19** Amendment S-3159 filed. `amendment-introduction`
- **2023-04-20** Amendment S-3167 to S-3159 filed, adopted.
- **2023-04-20** Amendment S-3159 adopted, as amended. `amendment-passage`
- **2023-04-20** Passed Senate, yeas 48, nays 1. `passage`
- **2023-04-20** Immediate message.
- **2023-04-20** Message from Senate.
- **2023-04-20** Senate amendment H-1280 filed. `amendment-introduction`
- **2023-05-01** House concurred in Senate amendment H-1280.
- **2023-05-01** Passed House, yeas 88, nays 6. `passage`
- **2023-05-02** Explanation of vote.
- **2023-05-03** Explanation of vote.
- **2023-05-03** Explanation of vote.
- **2023-05-01** Immediate message.
- **2023-05-02** Message from House.
- **2023-05-09** Reported correctly enrolled, signed by Speaker and President, and sent to Governor.
- **2023-05-10** Signed by Governor. `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/b1e0b371-d3f9-4307-8bbb-69c2568e64d8`. Confidence: reported (aggregated from official Iowa legislature records).