Inpatient Acute Medical Services denials in California external review

In the California DMHC record, independent physician reviewers decided 341 published external-review cases involving inpatient acute medical services and overturned the plan’s denial in 49%. That is a historical result among cases that reached this program, not a forecast for an individual appeal.

California DMHC decisions
341
2002–2026
Overturned
49%
167 denials reversed

By denial reason

The stated reason changes which facts, criteria, and records matter.
Denial reasonDecisionsOverturned
medical necessity321
48%

Within this category

Subcategories with at least 15 published decisions.
SubcategoryDecisionsOverturned
Admission211
51.7%
Other39
41%
Early Discharge26
30.8%
Med/ Surg16
43.8%

What the insurer actually argued

Denials fall into different categories, and they don’t succeed equally — so the reason on your letter changes how you should answer it.
Reason givenDecisionsOverturned
Medical Necessity
The plan said the care wasn’t medically necessary. The most common fight, and the most winnable.
321
48%
Urgent Care
Expedited reviews, decided in days rather than weeks.
13
84.6%
Experimental/Investigational
The plan called the treatment unproven. These turn on published evidence, so the appeal is a literature argument.
7
28.6%
Typical time to a decision
17 days
Most land between 8 and 21 days
Handled as urgent
29.6%
Expedited when a delay would cause harm
Recent direction
Rising
59.2%65.3% overturned, last three years

What the reviewers wrote

Excerpts from the independent reviewers’ published findings — the actual reasoning, quoted, not summarised.

Where the denial was overturned

Nature of Statutory Criteria/Case Summary: The patient has requested reimbursement for mental health inpatient level of care. 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 using a six-pronged Dimensional Rating System. The six dimensions include: (1) risk of harm; (2) functional status; (3) medical, addictive and psychiatric comorbidity; (4) recovery environment (a. stressors and b. supports); (5) treatment and recovery history; and (6) engagement. The composite score is then used to determine the level of care needed. For dimension 1, with regard to risk of harm, the records support a score of 4. The patient had a serious risk of harm.
Medical Necessity · 2024 · IMR MN24-41524
Nature of Statutory Criteria/Case Summary: The patient’s parent has requested reimbursement for the full inpatient hospital stay. Bronchiolitis is an inflammatory process that affects predominantly small airways. Acute bronchiolitis is a clinical diagnosis given when signs and symptoms include viral upper respiratory prodrome followed by increased respiratory effort, wheezing, and diffuse bilateral crackles, generally affecting infants less than 24 months of age. The most common causative agent is respiratory syncytial virus, but other viruses may also cause bronchiolitis, including adenovirus, rhinovirus, influenza, enterovirus, parainfluenza, and human metapneumovirus. Non-viral causes include mycoplasma, chlamydia, fungi, and mycobacteria.
Medical Necessity · 2023 · IMR MN23-40432

Where the denial was upheld

Worth reading too — these show what an appeal has to overcome.
Nature of Statutory Criteria/Case Summary: The patient is a 60-year-old female with a history of chronic obstructive pulmonary disease (COPD), lung cancer, chronic kidney disease, and chronic liver failure who presented to the hospital for upper gastrointestinal bleeding, sepsis with hypoxemic respiratory failure from pneumonia and possible congestive heart failure with severe lactic acidosis. The patient was initially hospitalized in the intensive care unit (ICU) and was intubated and sedated. She was treated with intravenous (IV) antibiotics and was also noted to have worsening renal failure initially requiring continuous renal replacement therapy (CRRT) then hemodialysis (HD). She was also treated for clostridium difficile infection.
Medical Necessity · 2023 · IMR MN23-38704
Nature of Statutory Criteria/Case Summary: An enrollee has requested reimbursement, authorization and coverage for acute rehabilitation services provided from 10/17/18 forward. Per Gajofatto and colleagues, primary progressive multiple sclerosis is characterized by continuous disability worsening from the onset, with no disease-modifying therapy currently proven to favorably impact its course and outcomes. Beer and colleagues note that the mainstays of treatment include managing symptoms and maximizing function through rehabilitation interventions, including energy conservation and compensatory measures. Intensive and aggressive exercise are frequently not tolerated and can be counterproductive.In the present case, the enrollee is reported to have primary progressive multiple sclerosis.
Medical Necessity · 2018 · IMR MN18-29551

Figures and quotations on this page come from 42,749 published decisions in the California DMHC Independent Medical Review dataset. These are California external-review outcomes. Other state and federal programs have different eligibility rules, processes, and current availability; the rates here do not transfer to those programs or predict an individual result. Excerpts are quoted verbatim from the public record and describe this category of care generally, not any individual case.

How to use this in your appeal

These outcomes describe eligible cases completed through California DMHC’s Independent Medical Review program. They do not estimate the chance that an internal appeal, an external review in another jurisdiction, or your individual case will succeed. Use the record to identify evidence patterns involving inpatient acute medical services, then check the rights and deadlines that apply to your plan.

SOURCE: CALIFORNIA DMHC INDEPENDENT MEDICAL REVIEW OUTCOMES (CHHS OPEN DATA) · AGGREGATES + DEIDENTIFIED DECISION EXCERPTS/REFERENCE IDS · METHODOLOGY

Not legal or medical advice. Coverage Rights is a self-help tool that helps you prepare your own appeal. For advice about your specific situation, talk to a licensed attorney or your doctor.

Denied for inpatient acute medical services? Use the California record to prepare.

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