Polysomnography denials in California external review

In the California DMHC record, independent physician reviewers decided 12 published external-review cases involving Polysomnographyand overturned the plan’s denial in 16.7%. That is a historical result among cases that reached this program, not a forecast for an individual appeal.

California DMHC decisions
12
2014–2025
Overturned
16.7%
2 denials reversed

Conditions behind Polysomnography denials

What insurers denied — and how those fights ended.
CategoryDecisionsOverturned
Obstructive Sleep Apnea10
10%
Typical time to a decision
13 days
Most land between 8 and 15 days
Handled as urgent
16.7%
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 authorization and coverage for a sleep study. In this case, the records indicate the presence of daytime fatigue, accompanied by snoring and hypersomnia, which was significant enough to contribute to a motor vehicle accident. Despite the absence of an elevated body mass index (BMI) or nocturnal hypoxemia, the records highlight the coexistence of insomnia and attention deficit hyperactivity disorder (ADHD), which are both potentially linked to undiagnosed sleep apnea. Researcherswith ADHD, such as difficulties concentrating, ineffective planning, and restlessness. The authors further note that the treatment of OSA is associated with an improvement in ADHD symptoms. As with ADHD, insomnia and OSA may also share overlapping symptoms.
Medical Necessity · 2024 · IMR MN24-41046
Nature of Statutory Criteria/Case Summary: An enrollee has requested reimbursement for a sleep study test for evaluation of her history of daytime somnolence. Findings: The physician reviewer found that the submitted documentation supports the medical necessity of the services at issue. This patient presented with a clinical presentation that was suggestive of a sleep-related breathing disorder. In this case, the patient had significant malocclusion, dental crowding and a large tongue. Malocclusion has been linked to sleep-disordered breathing in recent publications. The presence of an enlarged tongue is also considered to be a potential risk factor for sleep-disordered breathing. There is sufficient evidence that correction of these anatomical abnormalities can lead to improvement/resolution in sleep-disordered breathing.
Medical Necessity · 2017 · IMR MN17-25403

Where the denial was upheld

Worth reading too — these show what an appeal has to overcome.
An enrollee has requested authorization and coverage for an in-center polysomnography test. American Academy of Sleep Medicine (AASM) guidelines recommend that polysomnography, or home sleep apnea testing with a technically adequate device, be used for the diagnosis of obstructive sleep apnea (OSA) in uncomplicated adult patients who present with signs and symptoms that indicate an increased risk of moderate to severe OSA. These guidelines recommend that if a single home sleep apnea test is negative, inconclusive, or technically inadequate, polysomnography should then be performed for the diagnosis of OSA.
Medical Necessity · 2019 · IMR MN19-31682
Findings: The physician reviewer found that Nature of Statutory Criteria/Case Summary: A patient has requested authorization and coverage for continuous positive airway pressure (CPAP) equipment and/or the requested sleep study (CPT code 95810). Unlike the treatment of obstructive sleep apnea (OSA) in adults, the treatment of OSA in children is approached comprehensively, considering their unique needs and their developing physical characteristics. According to the medical literature, diagnostic testing for OSA should be performed in conjunction with a comprehensive sleep evaluation and adequate follow-up. An in-lab diagnostic polysomnogram (PSG) is the standard diagnostic test for the diagnosis of OSA in adult patients in whom there is a concern for OSA based on a comprehensive sleep evaluation.
Medical Necessity · 2025 · IMR MN25-44467

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 treatment generally, not any individual case.

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 Polysomnography, 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.

Denied Polysomnography? Use the California record to prepare.

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