Partial Hospital for Mental Disorder: 62.9% of denials overturned
In 356 California IMR decisions from 2002 to 2025, reviewers overturned 224 (62.9%). In the last five years: 86.1% of 101. 354 were medical-necessity disputes, 2 urgent care.
By year (last five)
| Year | Decisions | Overturned |
|---|---|---|
| 2021 | 23 | 87.0% |
| 2022 | 17 | 88.2% |
| 2023 | 24 | 83.3% |
| 2024 | 14 | 85.7% |
| 2025 | 23 | 87.0% |
What the findings mention
| What the findings mention | Decisions | Overturned | All decisions here |
|---|---|---|---|
| Records did not supportThe findings say the documentation did not show what was needed (usually an upheld denial). | 55 | 14.5% | 62.9% |
| Guidelines or criteria citedThe findings cite guidelines, criteria or a standard of care. | 31 | 61.3% | 62.9% |
| Published evidence citedThe findings refer to peer-reviewed or published evidence. | 28 | 67.9% | 62.9% |
| Prior therapies failedThe findings mention treatments that were tried without adequate response. | 13 | 69.2% | 62.9% |
| Urgent or emergencyThe findings mention urgency. | 6 | 83.3% | 62.9% |
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 reimbursement for (1) any or all partial hospitalization program (PHP) services, specifically ASAM level 2.5, and/or (2) any or all intensive outpatient program (IOP) services, specifically ASAM level 2.1. Using the American Society of Addiction Medicine (ASAM) Level 2.5 criteria, the patient met the criteria for …”
“The physician reviewer found that Nature of Statutory Criteria/Case Summary: The parent of a patient has requested reimbursement for partial hospitalization program (PHP) services.The American Academy of Child and Adolescent Psychiatry (AACAP) and American Association for Community Psychiatry (AACP) have unified the Child and Adolescent Level of Care Utilization System (CALOCUS) and the Child and Adolescent Service Intensity Instrument (CASII) …”
“The physician reviewer found that Nature of Statutory Criteria/Case Summary:A patient has requested reimbursement for partial hospitalization program (PHP) services. PHP is an established level of care for individuals with substance use or mental health conditions who require structured, intensive treatment but do not require inpatient hospitalization. Clinical guidelines support this level of care when patients have ongoing symptoms that …”
And one the reviewer upheld
“The physician reviewer found that Nature of Statutory Criteria/Case Summary: A patient has requested reimbursement for partial hospitalization program (PHP) services. The American Association of Community Psychiatrists Level of Care Utilization System (LOCUS) provides a reliable framework for determining the appropriate level of care for adults needing mental health treatment. Using LOCUS, providers score patients on a scale of 1-5 …”
- 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 Partial Hospital denials for Mental Disorder overturned?
In 356 California IMR decisions from 2002 to 2025, reviewers overturned 224 (62.9%). In the last five years: 86.1% of 101. 354 were medical-necessity disputes, 2 urgent care.
What should an appeal document, based on these findings?
Whatever the plan's criteria ask for, shown in the record: the treatments already tried and their results, contraindications to the plan's preferred option, the guideline or evidence that supports the request, and the treating clinician's reasoning written to the criteria. The tag table shows which of these the reviewers mentioned most in overturned cases.
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 they weigh the same things.
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.