The free appeal that overturns three out of four therapy denials

A denial letter is written to sound final. It is not. California runs a process where doctors who do not work for your health plan read the file and decide, and their decision binds the plan.¹ It costs you nothing — the statute says so in one sentence: "The enrollee shall pay no application or processing fees of any kind."² Plans fund it through an assessment.³

And it works, especially here. Of the Independent Medical Review determinations the state has published for 2023 through 2025 where the diagnosis category was a mental or behavioural disorder, 803 of 1,043 were decided against the health plan — about 77%. Across all conditions in the same period it was about 68%. Both figures are our own computation from the state's raw determinations file, and mental-health denials came out above the all-cause average in every period we measured.⁴

Waypoint 1: Find out which regulator you belong to

This decides everything, and there is a reliable test. California requires a specific paragraph — in 12-point boldface — on your evidence of coverage and on every written response to a grievance.⁵ Find it and read the phone number:

• 1-888-466-2219 / dmhc.ca.gov → the Department of Managed Health Care. Most Californians, including most HMOs and many PPOs.⁵
• 1-800-927-4357 / insurance.ca.gov → the Department of Insurance, which runs a parallel IMR with the same deadlines.⁶
• Neither number appears anywhere → your employer probably self-funds the plan, and neither state IMR applies.⁷

Do not sort this by plan type. "PPO means the insurance department" is wrong — many California PPOs are licensed under the same act as HMOs. Use the notice, not the label. Also outside the process: Medi-Cal fee-for-service members and workers' compensation disputes.⁷

Waypoint 2: File a grievance with the plan — and know when you are free of it

You start inside the plan. It must acknowledge your grievance in writing within five calendar days and resolve it within 30 days.⁸

Here is the part that costs people weeks. The statute says you qualify for IMR when the decision "is upheld or the grievance remains unresolved after 30 days," and that you "shall not be required to participate in the plan's grievance process for more than 30 days."⁹ That 30 days is a ceiling on the plan, not a waiting period for you. If the plan denies your grievance on day six, you can apply on day six.

If the case is urgent, the ceiling is three days, not 30.⁹ And in a case involving an imminent and serious threat to health — the statute names severe pain and potential loss of life, limb or major bodily function — you are not required to complete the plan's process at all.¹⁰ The department can also waive the requirement "in extraordinary and compelling cases."¹¹

Waypoint 3: Apply — and note what the deadline is measured from

You have six months from the qualifying event, and the director may extend that "if the circumstances of a case warrant."¹² The plan is required to hand you the application form with its denial, along with an addressed envelope.¹³

Two things to put in the file: your therapist's or doctor's written statement that the service is medically necessary, and — if the case is urgent — a written certification of that from your provider, which is what triggers the expedited clock.¹⁴

One warning that appears on the form itself: declining to take part in IMR "may cause the enrollee to forfeit any statutory right to pursue legal action against the plan."¹³ Filing costs you no rights. Not filing can.

Waypoint 4: The clocks, and the honest version of them

Now the reality, because the statutory clock starts later than you think. The 30 days runs from when the review organisation has your application and the supporting documents — not from the day you post the form. The department's own consumer guidance says an IMR is "usually decided within 45 days, or within 7 days if the health issue is urgent."¹⁷ In the state's raw data for 2024–2025, the median time from the department receiving an application to the director's adopted decision was about 48 days for standard cases and about 17 days for expedited ones.⁴ Plan for that, and escalate at 45 days rather than at 31.

One more thing in your favour: if the reviewing doctors split evenly, the statute says the decision goes in favour of providing the service.¹⁸

What IMR cannot do — and what to file instead

IMR reviews medical necessity. The reviewers are barred from considering "coverage decisions or other contractual issues."¹⁹ If your plan says the service simply is not a covered benefit, that is a different route: a department review under §1368, where the department's order is also binding on the plan.²⁰

You do not have to classify your own case correctly, though. The department, not the plan, decides which track applies — and the statute is emphatic: "If there appears to be any medical necessity issue, the grievance shall be resolved pursuant to an independent medical review."²¹

The argument most therapy denials hand you for free

Since 1 January 2021, a California plan reviewing a mental health or substance use denial must apply the criteria "developed by the nonprofit professional association for the relevant clinical specialty," and "shall not apply different, additional, conflicting, or more restrictive utilization review criteria."²² Plans must also cover the full range of levels of care, including residential treatment, partial hospitalisation and intensive outpatient, and may not limit mental health coverage "to short-term or acute treatment."²³

So read your denial for the criteria it names. If it cites the plan's own internal guidelines rather than the specialty association's, that is a probable violation on its face — worth stating in the grievance and worth reporting to the department separately from the IMR.

What happens next: the printable appeal worksheet → walks the grievance and the IMR application step by step, and how to file a complaint with the DMHC → covers the parallel route when the problem is access rather than a denial. If the denial was for testing, the testing-denial page → has the medical-necessity language these letters recite.

Q: Does filing an IMR mean giving up my right to sue? A: No — the opposite. The statute says the IMR process "is in addition to any other procedures or remedies that may be available," and the application form must warn that declining IMR may forfeit a statutory right to sue the plan.

Q: I'm on Medicare or a Medicare Advantage plan. Can I use IMR? A: Probably not, and the sources disagree, so treat this carefully. The Health & Safety Code says Medicare enrollees "shall not be excluded unless expressly preempted by federal law," while the department's own consumer FAQ lists Medicare enrollees as not eligible. Medicare Advantage plans are regulated federally and have their own appeal process with its own deadlines. Call the department's help line and ask before spending your six months.

Sources

1. Health & Safety Code §1374.33(f): "The director shall immediately adopt the determination of the independent medical review organization, and shall promptly issue a written decision to the parties that shall be binding on the plan." — leginfo.legislature.ca.gov
2. Health & Safety Code §1374.30(l) — leginfo.legislature.ca.gov. Note that this provision is widely miscited to §1374.30(d), which is the routing provision.
3. Health & Safety Code §1374.35(b) — costs "borne by health care service plans pursuant to an assessment fee system established by the director."
4. Our own computation from "Independent Medical Review (IMR) Determinations, Trend," California Health & Human Services Open Data Portal (42,749 determinations, 2001–2026; file last modified 1 June 2026), counting rows where the determination overturned the plan. Mental and behavioural diagnosis categories, 2023–2025: 803 of 1,043 overturned (77.0%). All categories, same period: 5,195 of 7,691 (67.6%), which matches the department's own published statement that "approximately 68 percent of patients receive the requested service through IMR." Timing medians are from the same file's day-count fields. Partial-year 2026 rows are excluded from period figures — data.chhs.ca.gov
5. Health & Safety Code §1368.02(b) — the required boldface notice, including the department's toll-free number 1-888-466-2219 and TDD 1-877-688-9891 — leginfo.legislature.ca.gov
6. Insurance Code §10169(i) (the parallel notice, with 1-800-927-4357) and Insurance Code §§10169–10169.5, whose grievance ceiling, six-month deadline, fee bar, 30-day and 3-day decision clocks and binding effect (§10169.3(f)) mirror the Health & Safety Code — leginfo.legislature.ca.gov. One asymmetry worth knowing: the Insurance Code article contains no equivalent of the five-working-day implementation deadline or the $10,000-a-day penalty.
7. Department of Managed Health Care, IMR frequently asked questions — not eligible: Medicare enrollees, Medi-Cal fee-for-service members, members of self-insured and self-funded plans, and workers' compensation disputes — dmhc.ca.gov. The exclusion of self-funded employer plans rests on federal law, not California law.
8. Health & Safety Code §1368(a)(4)(A) (written acknowledgment within five calendar days) and §1368.01(a) ("resolve grievances within 30 days").
9. Health & Safety Code §1374.30(j)(3) — including "In the case of a grievance that requires expedited review pursuant to Section 1368.01, the enrollee shall not be required to participate in the plan's grievance process for more than three days."
10. Health & Safety Code §1368(b)(1)(A) — imminent and serious threat, "including, but not limited to, severe pain, the potential loss of life, limb, or major bodily function."
11. Health & Safety Code §1374.31(a).
12. Health & Safety Code §1374.30(k).
13. Health & Safety Code §1374.30(m) and (m)(1) — the plan must supply "a one- or two-page application form approved by the department, and an addressed envelope," carrying notice that declining IMR "may cause the enrollee to forfeit any statutory right to pursue legal action against the plan regarding the disputed health care service"; §1374.30(i) requires the IMR notice on denial letters and grievance responses.
14. Health & Safety Code §1374.33(c) — 30 days from receipt of the application and supporting documentation; three days where a provider or the department certifies in writing that an imminent and serious threat may exist; extension of up to three days for extraordinary circumstances or good cause.
15. Health & Safety Code §1374.30(n) (three business days) and §1374.31(a) (24 hours in urgent cases).
16. Health & Safety Code §1374.34(a) and (b) — implementation within five working days, and an administrative penalty "of not less than ten thousand dollars ($10,000) for each day that the decision is not implemented."
17. Department of Managed Health Care consumer guidance and IMR application form: "IMRs are usually decided within 45 days, or within 7 days if the health issue is urgent."
18. Health & Safety Code §1374.33(d) — "If the medical professionals reviewing the case are evenly split… the decision shall be in favor of providing the service."
19. Health & Safety Code §1374.31(c).
20. Health & Safety Code §1368(b) — department review of a grievance, with the director's order binding on the plan.
21. Health & Safety Code §1374.30(d)(2) and (d)(3).
22. Health & Safety Code §1374.721(b) and (c) — leginfo.legislature.ca.gov
23. Health & Safety Code §1374.72(a)(6) and (b)(2) — leginfo.legislature.ca.gov. Most recently amended by SB 402 (Stats. 2025, Ch. 413), effective 1 January 2026.

Every deadline above was read on the statutory text on 17 August 2026. This page describes the law; it is not legal advice.