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Opioid Use Disorder: when insurers say no, reviewers often say yes
In 198 published external-review decisions involving opioid use disorder, independent physician reviewers overturned the insurer’s denial 72.7% of the time.
Published decisions
198
2001–2026
Overturned
72.7%
144 denials reversed
Most-fought treatments for opioid use disorder
What insurers denied — and how those fights ended.
| Treatment | Decisions | Overturned |
|---|---|---|
| Residential Treatment Center | 143 | 83.9% |
What the insurer actually argued
Denials fall into different categories, and they don’t succeed equally — so the reason on your letter changes how you should answer it.
| Reason given | Decisions | Overturned |
|---|---|---|
Medical Necessity The plan said the care wasn’t medically necessary. The most common fight, and the most winnable. | 195 | 73.3% |
Urgent Care Expedited reviews, decided in days rather than weeks. | 3 | 33.3% |
Typical time to a decision
12 days
Most land between 6 and 21 days
Handled as urgent
53.5%
Expedited when a delay would cause harm
What the reviewers wrote
Excerpts from the independent reviewers’ published findings — the actual reasoning, quoted, not summarised.
Where the denial was overturned
Nature of Statutory Criteria/Case Summary: The patient has requested reimbursement and prospective authorization and coverage for residential treatment center (RTC) services (ASAM 3.1). Per the American Society of Addiction Medicine (ASAM) criteria, this patient meets Level 3.1 criteria for RTC services. ASAM criteria focus on six dimensions to determine the appropriate level of care, which includes: (1) intoxication and withdrawal potential; (2) biomedical conditions; (3) emotional, behavioral, and cognitive conditions; (4) readiness to change; (5) relapse, continued use, or continued problem potential; and (6) recovery environment. For dimension 1, the patient did not have any symptoms of acute withdrawal after completing detoxification services and was being treated in Level 3.1 RTC. Given these findings, the patient meets ASAM 3.1 requirements for this dimension.
Findings: The physician reviewer found that The patient has requested reimbursement and prospective authorization and coverage for partial hospitalization program (PHP) services (ASAM level 2.5) received from 2/27/23-3/20/23 and/or intensive outpatient program (IOP) services (ASAM level 2.1) received from 3/21/23-forward. Per the American Society of Addiction Medicine (ASAM) criteria, this patient met Level 2.5 criteria for PHP services received from 2/27/23-3/20/23.
Where the denial was upheld
Worth reading too — these show what an appeal has to overcome.
Nature of Statutory Criteria/Case Summary: The patient requested reimbursement and prospective authorization and coverage for residential treatment center (RTC) services (ASAM 3.5).Findings: The physician reviewer found that ASAM criteria focuses on six dimensions to determine the appropriate level of care, which includes: (1) intoxication and associated risk, withdrawal and associated risks, and addiction medication needs; (2) biomedical conditions including physical health concerns and pregnancy-related concerns; (3) psychiatric and cognitive conditions and history including active psychiatric symptoms and persistent disability; (4) substance use-related risks including the likelihood of engaging in risky substance use and the likelihood of engaging in risky substance use disorder-related behaviors; (5) recovery environment interactions including the ability to function effectively in…
Nature of Statutory Criteria/Case Summary: The enrollee has requested reimbursement for Residential Treatment Center (ASAM 3.5) level of care services. Findings: The physician reviewer found that California Health and Safety Code section 1374.72(a)(3)(A) states that “Medically necessary treatment of a mental health or substance use disorder” means a service or product addressing the specific needs of that patient, for the purpose of preventing, diagnosing, or treating an illness, injury, condition, or its symptoms, including minimizing the progression of that illness, injury, condition, or its symptoms, in a manner that is all of the following:(i) In accordance with the generally accepted standards of mental health and substance use disorder care.(ii) Clinically appropriate in terms of type, frequency, extent, site, and duration.(iii) Not primarily for the economic benefit of the health…
Figures and quotations on this page come from 42,749 published decisions in the California DMHC Independent Medical Review dataset. These are California outcomes — every state runs an equivalent external review, but the rates here are California’s. Excerpts are quoted verbatim from the public record and describe this condition generally, not any individual case.
How to use this in your appeal
These outcomes come from California’s external review program — an independent physician panel whose decision binds the insurer. Every state has an equivalent, and internal appeals succeed even more often. If your care for opioid use disorder was denied, the published record says the denial is worth fighting.
SOURCE: CALIFORNIA DMHC INDEPENDENT MEDICAL REVIEW OUTCOMES (CHHS OPEN DATA) · DERIVED AGGREGATE STATISTICS ONLY · METHODOLOGY
Not legal or medical advice. Coverage Rights is a self-help tool that helps you prepare your own appeal. For advice about your specific situation, talk to a licensed attorney or your doctor.