---
type: "Bill"
title: "Health care coverage: medical loss ratios."
description: "Existing law, the Knox-Keene Health Care Service Plan Act of 1975, provides for the licensure and regulation of health care service plans by the Department of Managed Health Care and makes a willful violation of the act a crime. Existing law provides for the regulation of health insurers by the Department of Insurance."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20172018"
identifier: "AB 2499"
citation: "California AB 2499 (20172018)"
classification: ["bill"]
subjects: ["Health care coverage: medical loss ratios."]
status: "enacted"
primary_sponsors: ["Arambula"]
version_count: 8
action_count: 25
vote_count: 7
first_action: "2018-02-14"
last_action: "2018-09-22"
source: "openstates"
source_identifier: "ocd-bill/d2862188-fffa-4350-b3de-b40358c595a0"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201720180AB2499"
source_hash: "a91fcb0c9f0b1168be6d4462eb9ccdf9d5ef4737bc989c222956b2a20b041381"
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-ca"]
---

# California AB 2499 (20172018) — Health care coverage: medical loss ratios.

Existing law, the Knox-Keene Health Care Service Plan Act of 1975, provides for the licensure and regulation of health care service plans by the Department of Managed Health Care and makes a willful violation of the act a crime. Existing law provides for the regulation of health insurers by the Department of Insurance.

## Version chain

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

1. **02/14/18 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180AB2499&version=20170AB249999INT)
2. **04/17/18 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180AB2499&version=20170AB249998AMD)
3. **06/07/18 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180AB2499&version=20170AB249997AMD)
4. **06/18/18 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180AB2499&version=20170AB249996AMD)
5. **08/09/18 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180AB2499&version=20170AB249995AMD)
6. **09/22/18 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180AB2499&version=20170AB249993CHP)
7. **AB2499** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201720180AB2499)
8. **08/24/18 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180AB2499&version=20170AB249994ENR)

## Votes

- AB 2499 ARAMBULA Assembly Third Reading — **50–24** (pass) · lower
- Do pass — **7–0** (pass) · upper
- Do pass as amended, but first amend, and re-refer to the Committee on [Appropriations] — **7–0** (pass) · upper
- Do pass as amended and be re-referred to the Committee on [Appropriations] — **10–4** (pass) · lower
- 3rd Reading AB2499 Arambula et al. By Pan — **39–0** (pass) · upper
- Do pass. — **12–4** (pass) · lower
- AB 2499 ARAMBULA Concurrence in Senate Amendments — **70–0** (pass) · lower

## Sponsors

- Arambula — primary (person)
- Wood — coauthor (person)

## Timeline

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

- **2018-02-14** Read first time. To print. `reading-1`
- **2018-02-15** From printer. May be heard in committee March 17.
- **2018-03-05** Referred to Com. on HEALTH. `referral-committee`
- **2018-04-16** From committee: Amend, and do pass as amended and re-refer to Com. on APPR. (Ayes 10. Noes 4.) (April 10). `amendment-passage, committee-passage, amendment-introduction`
- **2018-04-17** Read second time and amended. `reading-1, amendment-passage, reading-2`
- **2018-04-18** Re-referred to Com. on APPR. `referral-committee`
- **2018-05-16** In committee: Set, first hearing. Referred to APPR. suspense file. `referral-committee`
- **2018-05-25** From committee: Do pass. (Ayes 12. Noes 4.) (May 25). `committee-passage-favorable, committee-passage`
- **2018-05-25** Read second time. Ordered to third reading. `reading-2, reading-1`
- **2018-05-29** Read third time. Passed. Ordered to the Senate. (Ayes 50. Noes 24. Page 5439.) `reading-3, passage, reading-1`
- **2018-05-30** In Senate. Read first time. To Com. on RLS. for assignment. `reading-1`
- **2018-06-07** Referred to Com. on HEALTH. `referral-committee`
- **2018-06-07** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Com. on HEALTH. `amendment-passage, referral-committee, reading-2, reading-1, amendment-introduction`
- **2018-06-14** From committee: Amend, and do pass as amended and re-refer to Com. on APPR. (Ayes 7. Noes 0.) (June 13). `amendment-passage, committee-passage, amendment-introduction`
- **2018-06-18** Read second time and amended. Re-referred to Com. on APPR. `amendment-passage, reading-2, referral-committee, reading-1`
- **2018-07-02** From committee: Do pass. (Ayes 7. Noes 0.) (July 2). `committee-passage-favorable, committee-passage`
- **2018-07-03** Read second time. Ordered to third reading. `reading-2, reading-1`
- **2018-08-09** Read third time and amended. Ordered to second reading. `amendment-passage, reading-3, reading-1`
- **2018-08-13** Read second time. Ordered to third reading. `reading-2, reading-1`
- **2018-08-20** Read third time. Passed. Ordered to the Assembly. (Ayes 39. Noes 0. Page 5446.). `reading-3, passage, reading-1`
- **2018-08-20** In Assembly. Concurrence in Senate amendments pending. May be considered on or after August 22 pursuant to Assembly Rule 77.
- **2018-08-23** Senate amendments concurred in. To Engrossing and Enrolling. (Ayes 70. Noes 0. Page 6499.). `committee-passage-favorable, amendment-passage`
- **2018-08-28** Enrolled and presented to the Governor at 3 p.m.
- **2018-09-22** Approved by the Governor. `executive-signature`
- **2018-09-22** Chaptered by Secretary of State - Chapter 678, Statutes of 2018.

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/d2862188-fffa-4350-b3de-b40358c595a0`. Confidence: reported (aggregated from official California legislature records).