C-Pap Machine denials: 56.1% overturned by independent reviewers
In 66 California IMR decisions from 2002 to 2025, reviewers overturned the plan 37 times (56.1%). In the last five years: 62.5% of 8. Denials reach IMR only when a member appeals all the way; read the caveats below before generalising.
By diagnosis
| Diagnosis category | Decisions | Overturned | Last 5 years |
|---|---|---|---|
| Respiratory System | 48 | 50.0% | — |
| CNS/ Neuromusc Dis | 17 | 70.6% | 62.5% of 8 |
By year (last five)
| Year | Decisions | Overturned |
|---|---|---|
| 2021 | 3 | 100.0% |
| 2022 | 1 | 0.0% |
| 2023 | 2 | 100.0% |
| 2024 | 1 | 0.0% |
| 2025 | 1 | 0.0% |
What the findings mention
| What the findings mention | Decisions | Overturned | All decisions here |
|---|---|---|---|
| Published evidence citedThe findings refer to peer-reviewed or published evidence. | 18 | 66.7% | 56.1% |
| Records did not supportThe findings say the documentation did not show what was needed (usually an upheld denial). | 8 | 12.5% | 56.1% |
| Step therapy or fail-firstThe findings mention a fail-first requirement. | 7 | 85.7% | 56.1% |
| Guidelines or criteria citedThe findings cite guidelines, criteria or a standard of care. | 4 | 75.0% | 56.1% |
Keyword matches on the reviewer’s findings, not causes. A tag that appears mostly in overturned decisions is worth documenting in an appeal; it is not a guarantee.
From recent overturned decisions
“Nature of Statutory Criteria/Case Summary: The patient has requested authorization and coverage for a continuous positive airway pressure (CPAP) device (E0601) and supplies. As noted in the medical literature, a CPAP device is highly effective in treating patients with obstructive sleep apnea (OSA). The patient completed a diagnostic sleep study indicating an apnea-hypopnea index (AHI) ranging from five to 15 …”
“The physician reviewer found that Nature of Statutory Criteria/Case Summary: The patient has requested reimbursement for continuous positive airway pressure (CPAP) supplies including mask, nasal pillows, tubing, and filters. As noted in medical literature, obstructive sleep apnea (OSA) is a chronic disorder that requires lifelong care. Noncompliance of treatment with CPAP does not negate the requirement for adequate therapy. This …”
“Nature of Statutory Criteria/Case Summary: The patient has requested authorization and coverage for a continuous positive airway pressure (CPAP) device. The submitted documentation supports the medical necessity of the requested device. The patient reported symptoms of fatigue and sleepiness during the day. Additionally, he has a history of depression and insomnia. Medical literature defines obstructive sleep apnea as a polysomnogram-determined …”
- California only: these are decisions by independent reviewers under California's IMR program (plans regulated by the Department of Managed Health Care). Other states and self-funded employer plans use different reviewers and rules.
- Selection: only denials that a member took all the way to IMR appear. Most denials are never appealed, and the ones that reach an external reviewer are not a random sample.
- Overturned means the reviewer disagreed with the plan; it does not mean the treatment worked or that a similar request will be approved.
- Argument tags are keyword matches on the reviewer's findings. They describe what the findings mention, not why the case was decided.
- Categories are DMHC's own labels (treatment sub-category and diagnosis category); 'Other' is a catch-all and is excluded from rankings.
Source: California Department of Managed Health Care, Independent Medical Review (IMR) Determinations, Trend (CHHS Open Data). Public California government data; Apellica's aggregates and tags are CC BY 4.0.
Questions
How often were C-Pap Machine denials overturned?
In 66 California IMR decisions from 2002 to 2025, reviewers overturned the plan 37 times (56.1%). In the last five years: 62.5% of 8.
What did the reviewers' findings mention in overturned cases?
The table on this page counts keyword matches in the findings: prior therapies tried, contraindications, guidelines cited, published evidence, whether the records supported the request. They describe what the findings say, not why the case was decided.
Does a California IMR result apply to my plan?
Only California plans regulated by the Department of Managed Health Care go to IMR. Other states and self-funded employer plans use different reviewers, but the reasoning is the same kind: criteria, documentation and alternatives. Use the findings as a guide to what to document.
Related: California appeal rights · California external-review reversal rate · The levers library · CSV
Independent reviewers reverse plans when the record answers the criteria. Upload the denial letter; a senior reviewer reads it within 24 hours and tells you in writing whether it can be appealed and how. $0 upfront, 10% of what is recovered, nothing if we do not recover. Not a law firm.