Interferon denials: 35.1% overturned by independent reviewers
In 37 California IMR decisions from 2002 to 2024, reviewers overturned the plan 13 times (35.1%). In the last five years: 100.0% of 1. 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 |
|---|---|---|---|
| Infectious Disease | 26 | 26.9% | 100.0% of 1 |
| CNS/ Neuromusc Dis | 6 | 50.0% | — |
By year (last five)
| Year | Decisions | Overturned |
|---|---|---|
| 2024 | 1 | 100.0% |
What the findings mention
| What the findings mention | Decisions | Overturned | All decisions here |
|---|---|---|---|
| Published evidence citedThe findings refer to peer-reviewed or published evidence. | 5 | 80.0% | 35.1% |
| Prior therapies failedThe findings mention treatments that were tried without adequate response. | 3 | 66.7% | 35.1% |
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 Nature of Statutory Criteria/Case Summary: A patient has requested authorization and coverage for Actimmune (interferon). Coccidioidal meningitis is a life-threatening fungal infection of the central nervous system. In this case, the patient has been diagnosed with coccidioidal meningitis and she is requesting treatment with Actimmune. She previously received treatment with a ventriculoperitoneal (VP) shunt and …”
“Nature of Statutory Criteria/Case Summary: An enrollee has requested authorization and coverage for interferon alfa 2b injections. The submitted documentation supports the medical necessity of the requested medication. A large case series of 127 patients by researchers demonstrated an overall 54% response rate with a mean 9 degree improvement in curvature in all patients. The study concluded that intralesional therapy …”
“Nature of Statutory Criteria/Case Summary: A 48-year-old female enrollee has requested authorization and coverage for Avonex. Findings: The physician reviewer found that Avonex is U.S. Food and Drug Administration (FDA) approved and has been demonstrated to be effective in the treatment of MS. Avonex has been shown to reduce relapses and disability progression. Studies show interferons are similar efficacy to …”
- 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 Interferon denials overturned?
In 37 California IMR decisions from 2002 to 2024, reviewers overturned the plan 13 times (35.1%). In the last five years: 100.0% of 1.
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.