Migraine Rx denials: 83.1% overturned by independent reviewers
In 172 California IMR decisions from 2018 to 2026, reviewers overturned the plan 143 times (83.1%). In the last five years: 84.2% of 139. 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 |
|---|---|---|---|
| CNS/ Neuromusc Dis | 159 | 81.8% | 82.8% of 128 |
| Nervous System | 9 | 100.0% | 100.0% of 9 |
By year (last five)
| Year | Decisions | Overturned |
|---|---|---|
| 2021 | 26 | 84.6% |
| 2022 | 19 | 73.7% |
| 2023 | 27 | 81.5% |
| 2024 | 30 | 80.0% |
| 2025 | 28 | 92.9% |
| 2026 | 9 | 100.0% |
What the findings mention
| What the findings mention | Decisions | Overturned | All decisions here |
|---|---|---|---|
| Prior therapies failedThe findings mention treatments that were tried without adequate response. | 82 | 89.0% | 83.1% |
| Published evidence citedThe findings refer to peer-reviewed or published evidence. | 64 | 79.7% | 83.1% |
| Alternatives contraindicatedThe findings mention a contraindication to the plan's preferred option. | 36 | 88.9% | 83.1% |
| Guidelines or criteria citedThe findings cite guidelines, criteria or a standard of care. | 19 | 78.9% | 83.1% |
| FDA approval or off-label use discussedThe findings discuss the FDA label status of the treatment. | 15 | 80.0% | 83.1% |
| Records did not supportThe findings say the documentation did not show what was needed (usually an upheld denial). | 15 | 20.0% | 83.1% |
| Step therapy or fail-firstThe findings mention a fail-first requirement. | 15 | 86.7% | 83.1% |
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
“The physician reviewer found that a patient has requested authorization and coverage for Qulipta. The U.S. Food and Drug Administration (FDA) approves Qulipta as a prophylactic chronic migraine treatment based on its known efficacy and safety. Per the medical records, the patient has a diagnosis of migraines and has tried and failed multiple prior therapies but responded well to Qulipta. …”
“The physician reviewer found that a patient has requested authorization and coverage for Ajovy, when used in combination with the approved Nurtec. In this case, the patient has been diagnosed with chronic migraines and has attempted multiple prior therapies with limited relief. As such, the requested Ajovy, when used in combination with the approved Nurtec, is medically necessary for the …”
“The physician reviewer found that a patient has requested authorization and coverage for Nurtec. Nurtec is a U.S. Food and Drug Administration (FDA)-approved medication with known efficacy, safety, and general acceptance as an effective prophylactic and abortive migraine treatment. The American Headache Society recommends calcitonin gene-related peptide blocking medications, such as Nurtec, as first-line therapy for migraines. In this case, …”
- 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 Migraine Rx denials overturned?
In 172 California IMR decisions from 2018 to 2026, reviewers overturned the plan 143 times (83.1%). In the last five years: 84.2% of 139.
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.