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Intellectual Disability: when insurers say no, reviewers often say yes

In 24 published external-review decisions involving intellectual disability, independent physician reviewers overturned the insurer’s denial 54.2% of the time.

Published decisions
24
2001–2026
Overturned
54.2%
13 denials reversed

Most-fought treatments for intellectual disability

What insurers denied — and how those fights ended.
CategoryDecisionsOverturned
Occupational Therapy3
66.7%

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.
18
50%
Experimental/Investigational
The plan called the treatment unproven. These turn on published evidence, so the appeal is a literature argument.
6
66.7%
Typical time to a decision
21 days
Most land between 18 and 21 days
Handled as urgent
20.8%
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

Findings: The physician reviewer found that Nature of Statutory Criteria/Case Summary: The patient’s parent has requested authorization and coverage for a safety enclosure canopy for use with a cubby safety bed. As noted in the medical literature, hospital and customized hospital beds may be required for use in the homes of patients with mobility problems. Patients who require special positioning, the use of special attachments, or the need for elevation of the head of the bed may benefit from a hospital or customized hospital bed. In addition, patients with other risk factors, including patients with cognitive impairments or weakness, may require additional safety measures, such as specialized padding or an enclosed bed to prevent falls and entrapment. In this case, the patient has autism and intellectual disability.
Medical Necessity · 2024 · IMR MN24-41015
Nature of Statutory Criteria/Case Summary: An enrollee has requested authorization and coverage for gene testing. This patient’s provider has recommended whole exome sequencing to assist in this patient’s diagnosis and treatment given his history of autism, intellectual disability, syncope, hallucinations, and arachnoid cyst. Whole exome sequencing is a comprehensive test, which identifies changes in a patient’s DNA that are causative or related to their medical concerns. In contrast to current sequencing tests that analyze one gene or small groups of related genes, exome sequencing analyzes the exons or coding regions of over 20,000 genes. Neurodevelopmental disorders are often complex clinical scenarios attributed to single-gene mutations that may be detected through exome sequencing.
Experimental/Investigational · 2021 · IMR EI21-34952

Where the denial was upheld

Worth reading too — these show what an appeal has to overcome.
Nature of Statutory Criteria/Case Summary: The patient’s parent has requested authorization and coverage for inpatient psychiatric hospital program with a complete medication wash and a psychiatric evaluation. 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 · 2022 · IMR MN22-38028
Nature of Statutory Criteria/Case Summary: the parent of a 13-year-old female enrollee has requested authorization and coverage for neuro-processing disorder evaluation and health care services; auditory processing disorder evaluation and health care services; sensory processing disorder evaluation and health care services; primitive reflex vision disorder evaluation and health care services; and optometric vision therapy. Findings: The physician reviewer found that the patient has severe limitations in speech, which is limited to a few words, and intellect. Per the record, attempts to test the patient for auditory processing disorder could not be completed due to the patient's inability to follow rudimentary directions. The patient’s parent has requested multiple therapeutic tests and interventions to determine and improve the patient’s functional skills.
Experimental/Investigational · 2017 · IMR EI17-24731

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 intellectual disability 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.

Fighting a denial for intellectual disability? 54.2% won.

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