Eating Disorder denials in California external review

In the California DMHC record, independent physician reviewers decided 299 published external-review cases involving eating disorderand overturned the plan’s denial in 58.5%. That is a historical result among cases that reached this program, not a forecast for an individual appeal.

California DMHC decisions
299
2002–2025
Overturned
58.5%
175 denials reversed

Most-fought treatments for eating disorder

What insurers denied — and how those fights ended.
TreatmentDecisionsOverturned
Residential Treatment Center81
66.7%
Partial Hospitalization Program70
60%
Residential Treatment37
54.1%
Intensive Outpatient Program33
51.5%
Residential Treatment Center Admission16
62.5%

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 givenDecisionsOverturned
Medical Necessity
The plan said the care wasn’t medically necessary. The most common fight, and the most winnable.
294
59.2%
Urgent Care
Expedited reviews, decided in days rather than weeks.
3
33.3%
Typical time to a decision
15 days
Most land between 5 and 21 days
Handled as urgent
42.5%
Expedited when a delay would cause harm
Recent direction
Falling
84.4%78.3% overturned, last three years

What the reviewers wrote

Excerpts from the independent reviewers’ published findings — the actual reasoning, quoted, not summarised.

Where the denial was overturned

Findings: The physician reviewer found that Nature of Statutory Criteria/Case Summary: The patient requested reimbursement for residential treatment center (RTC) services.The American Association of Community Psychiatrists Level of Care Utilization System (LOCUS) provides a reliable framework for determining the appropriate level of care for adults needing mental health treatment. Using LOCUS, providers score patients on a scale of 1-5 using a six-pronged Dimensional Rating System. The six dimensions include: (1) risk of harm; (2) functional status; (3) medical, addictive and psychiatric comorbidity; (4) recovery environment (a. stressors and b. supports); (5) treatment and recovery history; and (6) engagement. The composite score is then used to determine the level of care needed.
Medical Necessity · 2024 · IMR MN24-42330
Findings: The physician reviewer found that The patient has requested reimbursement for residential treatment center (RTC) services. The American Academy of Child and Adolescent Psychiatry (AACAP) and American Association for Community Psychiatry (AACP) have unified the Child and Adolescent Level of Care Utilization System (CALOCUS) and the Child and Adolescent Service Intensity Instrument (CASII) into a single instrument, the Child and Adolescent Level of Care/Service Intensity Utilization System (CALOCUS-CASII). This instrument is a standardized tool used to determine the intensity of services needed for children and adolescents, 6-18 years of age, presenting with psychiatric, substance use, medical and/or developmental concerns. Using CALOCUS-CASII, providers score patients on a scale of 1-5 using a six-pronged Dimensional Rating System.
Medical Necessity · 2023 · IMR MN23-38830

Where the denial was upheld

Worth reading too — these show what an appeal has to overcome.
Findings: The physician reviewer found that Nature of Statutory Criteria/Case Summary: The parents of the patient requested reimbursement for residential treatment center (RTC) level of care services.The Researchers have unified the Child and Adolescent Level of Care Utilization System (CALOCUS) and the Child and Adolescent Service Intensity Instrument (CASII) into a single instrument, the Child and Adolescent Level of Care/Service Intensity Utilization System (CALOCUS-CASII). This instrument is a standardized tool used to determine the intensity of services needed for children and adolescents, 6-18 years of age, presenting with psychiatric, substance use, medical, and/or developmental concerns. Using CALOCUS-CASII, providers score patients on a scale of 1-5 using a six-pronged Dimensional Rating System.
Medical Necessity · 2024 · IMR MN24-41286
Nature of Statutory Criteria/Case Summary: The patient’s parent has requested reimbursement for partial hospitalization program (PHP) services. The American Academy of Child and Adolescent Psychiatry (AACAP) and American Association of Community Psychiatrists (AACP) have unified the Child and Adolescent Level of Care Utilization System (CALOCUS) and the Child and Adolescent Service Intensity Instrument (CASII) into a single instrument, the Child and Adolescent Level of Care/Service Intensity Utilization System (CALOCUS-CASII). This instrument provides a reliable framework for determining the appropriate level of care for adolescents needing mental health treatment. Using CALOCUS-CASII, providers score patients on a scale of 1-5 using a six-pronged Dimensional Rating System.
Medical Necessity · 2024 · IMR MN24-40913

Figures and quotations on this page come from 42,749 published decisions in the California DMHC Independent Medical Review dataset. These are California external-review outcomes. Other state and federal programs have different eligibility rules, processes, and current availability; the rates here do not transfer to those programs or predict an individual result. Excerpts are quoted verbatim from the public record and describe this condition generally, not any individual case.

Related guide

A diagnosis does not by itself establish treatment intensity. See the separate record for residential, PHP, IOP, inpatient, and withdrawal-management denials: behavioral-health level-of-care evidence guide.

How to use this in your appeal

These outcomes describe eligible cases completed through California DMHC’s Independent Medical Review program. They do not estimate the chance that an internal appeal, an external review in another jurisdiction, or your individual case will succeed. Use the record to identify evidence patterns involving eating disorder, then check the rights and deadlines that apply to your plan.

SOURCE: CALIFORNIA DMHC INDEPENDENT MEDICAL REVIEW OUTCOMES (CHHS OPEN DATA) · AGGREGATES + DEIDENTIFIED DECISION EXCERPTS/REFERENCE IDS · 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.

Fighting a denial for eating disorder? Use the California record to prepare.

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