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Prosthesis denials: what the review data shows
Independent reviewers have decided 94 published cases where an insurer denied Prosthesis — and they overturned the insurer 51.1% of the time. A denial for Prosthesis is a starting position, not a final answer.
Published decisions
94
2001–2026
Overturned
51.1%
48 denials reversed
Conditions behind prosthesis denials
What insurers denied — and how those fights ended.
| Category | Decisions | Overturned |
|---|---|---|
| Amputation | 55 | 49.1% |
| Stroke CVA | 4 | 25% |
| Auto Accident | 3 | 100% |
| Paralysis | 3 | 0% |
| Deformities | 3 | 0% |
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. | 64 | 53.1% |
Experimental/Investigational The plan called the treatment unproven. These turn on published evidence, so the appeal is a literature argument. | 30 | 46.7% |
Typical time to a decision
21 days
Most land between 13 and 22 days
Handled as urgent
10.6%
Expedited when a delay would cause harm
Recent direction
Rising
28.6% → 68.4% 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
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.
Findings: The physician reviewer found that The patient requested authorization and coverage for a Ossur Rheo microprocessor knee and Ottoback Maverick Comfort AT prosthetic foot.Current literature regarding the benefits of microprocessor-aided prosthetic knees relative to prosthetic knees without microprocessor-aided control is largely mixed and based on small patient numbers with low-quality data. A study indicated that there is a lack of high quality evidence showing improvement with microprocessor-aided prosthetic knee devices on the risk of falls and gait parameters over prosthetic knee devices without computer control. Further, the studies promoting motor-processor controlled knees are of low quality.
Where the denial was upheld
Worth reading too — these show what an appeal has to overcome.
Nature of Statutory Criteria/Case Summary: The patient has a history of multiple chronic medical conditions, including arthropathy, for which he underwent a total left knee replacement in the past. This was complicated by an infection, and he ultimately underwent a left transfemoral amputation on 11/1/11. The patient underwent rehabilitation, including prosthetic ambulation training. He received a `preparatory` endoskeletal prosthesis in or around 2011 with an Ossur Symbionic (microprocessor-aided) knee, but he reportedly gained weight and could no longer use this prosthesis. Case management notes indicate that he received a replacement prosthesis in 2013 due to a weight gain of approximately 80 lbs. On 9/17/18, his provider noted that he is a current smoker of 11-20 cigarettes per day.
Physician 1: The patient is a 24-year-old female who is status post right trans-femoral amputation following a motor vehicle accident in 2001. Her physician states the patient has used a wheelchair since the accident due to the fact that her limb is too short for a prosthesis. Her physician also indicates the patient underwent revision of the residual limb in October 2004 and has recovered well enough to allow her to use a prosthesis. The patient’s physician has recommended the patient receive an Otto-Bock C-leg prosthesis.There are no case-controlled, randomized studies demonstrating the superiority or improved functional outcomes of the Otto-Bock C-leg prosthesis compared to standard prosthetics.
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 treatment generally, not any individual case.
How to use this in your appeal
These are outcomes from California’s external review program — an independent physician panel that binds the insurer. Every state has an equivalent process, and internal appeals succeed even more often. Cite the outcome record for Prosthesiswhen you appeal: reviewers routinely find that denials like yours didn’t hold up.
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.