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Auto Accident: when insurers say no, reviewers often say yes
In 83 published external-review decisions involving auto accident, independent physician reviewers overturned the insurer’s denial 41% of the time.
Published decisions
83
2001–2026
Overturned
41%
34 denials reversed
Most-fought treatments for auto accident
What insurers denied — and how those fights ended.
| Category | Decisions | Overturned |
|---|---|---|
| Inpt Admission | 12 | 58.3% |
| Physical Therapy | 8 | 12.5% |
| Admission | 7 | 42.9% |
| MRI | 7 | 28.6% |
| Inpt Discharge | 6 | 33.3% |
| Ambulance Transport | 4 | 100% |
| Prosthesis | 3 | 100% |
| Emergency Room | 3 | 66.7% |
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 given | Decisions | Overturned |
|---|---|---|
Medical Necessity The plan said the care wasn’t medically necessary. The most common fight, and the most winnable. | 74 | 36.5% |
Urgent Care Expedited reviews, decided in days rather than weeks. | 5 | 80% |
Experimental/Investigational The plan called the treatment unproven. These turn on published evidence, so the appeal is a literature argument. | 4 | 75% |
Typical time to a decision
15 days
Most land between 5 and 21 days
Handled as urgent
36.1%
Expedited when a delay would cause harm
Recent direction
Rising
36.4% → 45.5% 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 and prospective authorization and coverage for skilled nursing facility (SNF) services, including speech therapy, physical therapy, and occupational therapy. As noted in the medical literature, admission to SNF is appropriate for patients with conditions that require observation, evaluation of treatment plans, and updating of orders by a physician as well as constantly available skilled nursing services. Patients treated in a SNF require skilled nursing services including wound management, tracheostomy care, bowel and bladder training and tube feeding, and administration of intravenous (IV) medications or medications that cannot be self-administered safely.
Physician 1: The patient is a 46-year-old woman who is a right above-the-knee amputee status post a motor vehicle accident. She underwent an open reduction internal fixation procedure on the left knee. She is requesting reimbursement for a microprocessor-controlled knee for the right leg that she obtained for the stated purposes of improved stability and function. The Health Plan has denied the patient’s request on the basis that the prosthetic device at issue is investigational in this setting.Upon review of the submitted documentation including review of the patient’s functional status and her activity level, it is not likely the patient will experience superior results with a microprocessor-controlled knee.
Where the denial was upheld
Worth reading too — these show what an appeal has to overcome.
Findings: The physician reviewer found that Nature of Statutory Criteria/Case Summary: The patient has requested reimbursement for the removal of the right breast implant. Medical literature notes that “Capsular contracture is a troublesome complication of breast implants which may require revision surgery. Capsular contracture initially presents with firmness of the breast and can progress to pain and distortion of the breast shape and volume.” The authors noted that “In a contracted breast, the capsule becomes thick and hard, and shrinks in a way which alters the contour of the breast and the position of the implant.” Medical literature establishes that “The degree of contracture is clinically graded by the grading system.
Findings: The physician reviewer found that Nature of Statutory Criteria/Case Summary: The patient has requested authorization and coverage for admission to an acute rehabilitation facility. The records indicate that this patient has a history of hypertension, hyperlipidemia, and diabetes mellitus type II. He was admitted to the hospital after sustaining injuries due to a motorcycle accident. The patient’s injuries included rib fractures, left-sided open radius and ulna fractures, and left-sided closed tibia and fibula fractures. The patient underwent left wrist and ankle open reduction with internal fixation (ORIF), incision and drainage, and placement of left ankle external fixator. The patient required removal of the lower extremity external fixator and tibia fibula closed reduction.
Figures and quotations on this page come from 42,749 published decisions in the California DMHC Independent Medical Review dataset. These are California outcomes — every state runs an equivalent external review, but the rates here are California’s. Excerpts are quoted verbatim from the public record and describe this condition generally, not any individual case.
How to use this in your appeal
These outcomes come from California’s external review program — an independent physician panel whose decision binds the insurer. Every state has an equivalent, and internal appeals succeed even more often. If your care for auto accident was denied, the published record says the denial is worth fighting.
SOURCE: CALIFORNIA DMHC INDEPENDENT MEDICAL REVIEW OUTCOMES (CHHS OPEN DATA) · DERIVED AGGREGATE STATISTICS ONLY · 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.