Lab Work denials: 31.6% overturned by independent reviewers
In 1,015 California IMR decisions from 2005 to 2026, reviewers overturned the plan 321 times (31.6%). In the last five years: 24.4% of 172. 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 |
|---|---|---|---|
| Cancer | 256 | 42.2% | 28.6% of 7 |
| Digestive System/ GI | 149 | 24.2% | 36.8% of 19 |
| Endocrine/Metabolic | 107 | 36.4% | 11.5% of 26 |
| Cardiac/Circ Problem | 101 | 15.8% | 22.2% of 18 |
| Prevention/Good Hlth | 68 | 27.9% | 8.3% of 12 |
| OB-GYN/ Pregnancy | 62 | 38.7% | — |
| GU/ Kidney Disorder | 36 | 19.4% | 20.7% of 29 |
| Infectious Disease | 33 | 39.4% | 53.3% of 15 |
| Mental Disorder | 29 | 6.9% | 33.3% of 3 |
| Orth/Musculoskeletal | 27 | 59.3% | 88.9% of 9 |
| CNS/ Neuromusc Dis | 22 | 31.8% | 0.0% of 2 |
| Blood Related Disord | 21 | 28.6% | 0.0% of 3 |
| Pediatrics | 19 | 10.5% | 0.0% of 9 |
| Pregnancy/Childbirth | 16 | 0.0% | 0.0% of 11 |
| Immuno Disorders | 16 | 25.0% | 25.0% of 4 |
| Genetic Diseases | 15 | 46.7% | 0.0% of 1 |
| Respiratory System | 10 | 60.0% | — |
| Not Applicable | 10 | 50.0% | — |
By year (last five)
| Year | Decisions | Overturned |
|---|---|---|
| 2021 | 27 | 18.5% |
| 2022 | 25 | 20.0% |
| 2023 | 35 | 22.9% |
| 2024 | 42 | 28.6% |
| 2025 | 39 | 30.8% |
| 2026 | 4 | 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. | 285 | 25.6% | 31.6% |
| Guidelines or criteria citedThe findings cite guidelines, criteria or a standard of care. | 228 | 18.0% | 31.6% |
| Records did not supportThe findings say the documentation did not show what was needed (usually an upheld denial). | 79 | 8.9% | 31.6% |
| Experimental or investigationalThe findings discuss whether the treatment is experimental. | 62 | 38.7% | 31.6% |
| Prior therapies failedThe findings mention treatments that were tried without adequate response. | 6 | 0.0% | 31.6% |
| Urgent or emergencyThe findings mention urgency. | 5 | 20.0% | 31.6% |
| Alternatives contraindicatedThe findings mention a contraindication to the plan's preferred option. | 5 | 20.0% | 31.6% |
| Step therapy or fail-firstThe findings mention a fail-first requirement. | 3 | 33.3% | 31.6% |
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 routine blood monitoring (including dihydrotestosterone (DHT) and estradiol levels) for side effects of finasteride. This patient has a diagnosis of androgenetic alopecia. Finasteride is U.S. Food and Drug Administration (FDA)-approved for this patient’s condition. Finasteride functions as an inhibitor of 5-alpha reductase …”
“The parent of a patient has requested authorization and coverage for a human growth hormone stimulation test. This patient presents with Ehlers-Danlos syndrome (EDS). The progeroid form of EDS has been associated with adult stature shorter than expected based on unaffected parents of normal height. If this patient’s height continues to track along the current percentile, the patient’s final adult …”
“The physician reviewer found that Nature of Statutory Criteria/Case Summary: A patient has requested reimbursement for collagen crosslinks testing. High levels of bone turnover markers can predict faster rates of bone loss and increased fracture risk in patients with osteoporosis. A study that looked at the relationship between bone density and markers of bone turnover found that in women treated …”
- 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 Lab Work denials overturned?
In 1,015 California IMR decisions from 2005 to 2026, reviewers overturned the plan 321 times (31.6%). In the last five years: 24.4% of 172.
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.