California IMR: Eligibility, Filing, and the Review Decision

California’s Independent Medical Review lets you challenge a health plan’s decision to deny, delay, or modify a treatment your doctor says you need. Independent physicians with no financial tie to your insurer evaluate the clinical evidence, the review costs you nothing, and if the reviewer sides with you the plan must authorize the service.¹²

Does IMR Apply to Your Plan

Two state agencies run the program. The Department of Managed Health Care (DMHC) regulates most HMOs and many PPOs, including the vast majority of Covered California plans. The California Department of Insurance (CDI) handles other PPOs and certain specialty health insurance products.³ If you don’t know which one regulates your plan, call the DMHC Help Center at 1-888-466-2219; if your plan belongs with CDI, DMHC will forward your complaint.⁴

Medi-Cal managed care enrollees also qualify, and have a dedicated line at 1-888-452-8609. Only Medi-Cal fee-for-service members (those not in a managed care plan) are excluded.³

One group IMR generally does not reach: people whose large employer self-funds its health plan rather than buying coverage from an insurer. Those plans are governed by the federal ERISA statute, and state insurance regulation generally cannot override federal law. Your insurance card often won’t tell you the difference, since self-funded employers frequently hire insurance companies to administer claims. Ask your HR department directly. If you’re in a self-funded plan, skip to the federal external review section below.

Who Qualifies

Under Health and Safety Code Section 1374.30 (for DMHC plans) and Insurance Code Section 10169 (for CDI plans), three things need to be true.⁵⁶

First, a provider connection. Your doctor has recommended the service as medically necessary, you received urgent or emergency care that a provider determined was necessary, or an in-network provider has seen you for the condition.

Second, the plan denied, delayed, or modified the service based at least in part on medical necessity. If the plan said the service simply isn’t a covered benefit under your policy, that’s a different dispute and goes through the standard complaint process.³

Third, you’ve been through your plan’s internal grievance process. If the plan upholds the denial or doesn’t respond within 30 days, you can move to IMR.

Disputes about experimental or investigational treatments also qualify, with reviewers judging whether the treatment is likely to be more beneficial than existing alternatives for your condition.⁷

You have six months to file after the plan’s written grievance response, or six months after the date the plan should have responded but didn’t.

Urgent Cases

If your situation involves an imminent and serious threat to your health, the 30-day grievance wait shrinks to three days before you can file for IMR.⁶ The state can also waive the grievance requirement entirely for serious pain, potential loss of life or major bodily function, or rapid deterioration.⁸

Expedited review requires a written certification from your treating physician stating that an imminent and serious threat exists. Without that certification, your case runs on the standard timeline no matter how urgent it feels.

What to Gather Before You File

Having the paperwork ready keeps intake moving.

The plan’s written denial letter, plus its written response to your internal grievance. If the plan never responded within 30 days, note the date you filed the grievance.
Medical records and test results, especially from the diagnosing or treating physician.
A letter from your treating doctor explaining why the proposed treatment is the most appropriate option. It isn’t strictly required, but reviewers are clinicians weighing clinical evidence, and a clear physician rationale can decide a close case.
The IMR/Complaint form. DMHC’s form is on the DMHC website or available by mail; CDI’s application is on the CDI website.⁹¹⁰

Be specific on the form. Include the exact procedure name or medication, relevant dates, and the dollar amount of the claim if you know it. Clear descriptions help the agency route your file to the right medical specialty.

If you want a family member, advocate, or attorney to handle this for you, complete an authorized representative form so the agency can speak with them about your case.⁹

How to Submit

DMHC encourages online filing through its portal, which generally processes faster. You can also mail or fax a signed paper form with supporting documents to the DMHC Help Center at 980 9th Street, Suite 500, Sacramento, CA 95814, or fax 916-255-5241.⁹ For CDI-regulated plans, mail the CDI application to the address on the form.¹⁰

You pay nothing. The statute prohibits charging enrollees any fees for IMR, and the insurance company covers the cost of the review.⁶¹

How the Review Works

Once the state confirms your case is eligible, it assigns the file to an Independent Review Organization staffed by medical professionals with no financial relationship to you or your insurer. They weigh the clinical evidence against established standards of care.

Standard reviews must produce a written determination within 30 days of the IRO receiving your application and documents. Expedited reviews with physician certification must be decided within three days.² The director can extend either deadline by up to three additional days in extraordinary circumstances.

The written decision explains the reviewer’s reasoning in plain language, references your medical condition and records, and states whether the service is medically necessary. If the reviewing physicians are evenly split, the statute says the tie goes to you: a split decision must be resolved in favor of providing the service.²

What the Decision Means

The IMR determination binds your health plan. The DMHC director adopts the IRO’s decision immediately and issues it to both parties.² If the reviewer sides with you, the plan must authorize the service within five working days, sooner if your condition requires it. A plan that drags its feet faces an administrative penalty of at least $5,000 for each day it remains noncompliant.¹¹

If the IMR upholds the denial, your options narrow. DMHC does not accept appeals of IMR determinations.¹² You can file a new IMR application if your medical condition changes or a new issue arises, and you keep whatever legal remedies state or federal law allows, including litigation, which is a much slower and costlier road.

When Your Dispute Isn’t About Medical Necessity

Not every problem with a health plan is an IMR case. Billing errors, being charged the wrong copay, trouble getting services in your language, or the plan canceling your coverage all go through the standard complaint process instead.³ DMHC and CDI use the same initial form for both tracks and will reclassify your case if you file for IMR but the dispute is really about coverage. The complaint track also produces a written decision, typically within 30 days.

Federal External Review if You’re in a Self-Funded Plan

If your employer self-funds its plan and California’s IMR doesn’t apply, federal regulations at 45 CFR 147.136 give you an external review for disputes involving medical judgment, experimental treatments, and certain other denial categories.¹³

You have four months from the denial to request review. The plan then has five business days to decide eligibility and one more to notify you. An accredited IRO has 45 days to issue a final decision, longer than California’s 30-day standard. Expedited review is available when delay would seriously jeopardize your life or health, with a 72-hour deadline.¹⁴ The decision binds the plan, the plan must authorize care or pay benefits immediately if the IRO overturns the denial, and no filing fees can be charged to you.¹³

1
California Department of Insurance. Independent Medical Review (IMR) Program
2
California Legislative Information. California Code HSC 1374.33
3
California Department of Managed Health Care. Frequently Asked Questions
4
California Department of Managed Health Care. Contact Us
5
California Legislative Information. California Code INS 10169
6
California Legislative Information. California Health and Safety Code 1374.30
7
Legal Information Institute. 28 CCR 1300.74.30 – Independent Medical Review System
8
New York Codes, Rules and Regulations. 28 CCR 1300.74.30 – Independent Medical Review System
9
California Department of Managed Health Care. Independent Medical Review/Complaint Forms
10
California Department of Insurance. Application for Independent Medical Review
11
California Department of Managed Health Care. Letter of Agreement
12
California Department of Managed Health Care. How to File a Complaint
13
eCFR. 45 CFR 147.136 – Internal Claims and Appeals and External Review Processes
14
eCFR. 45 CFR 147.136 – Internal Claims and Appeals and External Review Processes