Jaw Surgery denials: 77.5% overturned by independent reviewers
In 40 California IMR decisions from 2001 to 2025, reviewers overturned the plan 31 times (77.5%). In the last five years: 83.3% of 6. 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 |
|---|---|---|---|
| Orth/Musculoskeletal | 27 | 74.1% | 75.0% of 4 |
| Dental Problems | 10 | 100.0% | 100.0% of 2 |
By year (last five)
| Year | Decisions | Overturned |
|---|---|---|
| 2022 | 2 | 100.0% |
| 2025 | 4 | 75.0% |
What the findings mention
From recent overturned decisions
“The physician reviewer found that Nature of Statutory Criteria/Case Summary: A patient has requested authorization and coverage for arthroscopic temporomandibular joint (TMJ) surgery for the enrollee’s left side of the jaw. In this case, the patient was diagnosed with left-sided TMJ dysfunction confirmed by magnetic resonance imaging (MRI). The record confirmed that the patient attempted the conservative treatment approach without …”
“The physician reviewer found that Nature of Statutory Criteria/Case Summary: A patient has requested authorization and coverage for orthognathic surgery. In this case, the records establish that the patient has maxillary hypoplasia and mandibular hyperplasia (prognathism), resulting in malocclusion and facial asymmetry. The patient reports difficulty biting and chewing, an uncomfortable bite, difficulty smiling, and issues with tongue positioning. Surgical …”
“Nature of Statutory Criteria/Case Summary: A patient has requested authorization and coverage for maxillary mandibular advancement surgery (MMA). In this case, the patient was diagnosed with obstructive sleep apnea (OSA), characterized by recurrent episodes of upper airway obstruction during sleep, leading to significant daytime impairment and increased risk of cardiovascular complications. The record establishes that the patient tried conservative management …”
- 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 Jaw Surgery denials overturned?
In 40 California IMR decisions from 2001 to 2025, reviewers overturned the plan 31 times (77.5%). In the last five years: 83.3% of 6.
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.