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Osteoarthritis Of The Ankle: when insurers say no, reviewers often say yes

In 13 published external-review decisions involving osteoarthritis of the ankle, independent physician reviewers overturned the insurer’s denial 61.5% of the time.

Published decisions
13
2001–2026
Overturned
61.5%
8 denials reversed

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
Experimental/Investigational
The plan called the treatment unproven. These turn on published evidence, so the appeal is a literature argument.
7
42.9%
Medical Necessity
The plan said the care wasn’t medically necessary. The most common fight, and the most winnable.
6
83.3%
Typical time to a decision
21 days
Most land between 2 and 21 days
Handled as urgent
30.8%
Expedited when a delay would cause harm
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: An enrollee has requested a fitted shoe (orthotic boot) for treatment of his osteoarthritis of the left ankle. The physician reviewer found that a review of the literature reveals that for well selected patients, normal footwear is all that is needed following ankle fusion. However, articles also discuss several different types of shoe modifications, in-shoe orthoses, and ankle foot orthoses that are very commonly used for many patients following this procedure. Sirveaux and colleagues reported that modifying shoegear to increase the instep of the shoe improves the biomechanical abnormalities that occur.
Medical Necessity · 2015 · IMR MN15-20719
Nature of Statutory Criteria/Case Summary: An enrollee has requested authorization and coverage for Synvisc One injection (HCPCS J7325) in the right ankle.In a review by Papalia and colleagues, the authors indicate, “Current evidence suggests that viscosupplementation for treatment of ankle osteoarthritis is a safe and effective method.” The authors also concluded that more randomized controlled trials are needed. Khlopas and colleagues state that viscosupplementation with hyaluronic acid has been shown to be a safe and effective method of treating osteoarthritis of the ankle. The authors reason that, “For patients who have moderate to severe disease, surgery may be indicated.
Medical Necessity · 2021 · IMR MN21-36056

Where the denial was upheld

Worth reading too — these show what an appeal has to overcome.
Physician 1: The patient is 62-year-old woman with arthritis of the ankle. She wishes to proceed with ankle replacement utilizing the Agility Total Ankle Arthroplasty device. The Health Plan has denied coverage for the proposed procedure indicating there is in sufficient evidence of its efficacy in the peer-reviewed literature.The recommended prosthesis has been approved by the Food and Drug Administration and there is growing support in the medical literature for total ankle arthroplasty in the scientific literature. Several articles have been published regarding the efficacy of the procedure in appropriately selected patients. Based upon the records provided, the patient is a good candidate for total ankle arthroplasty. The only other option in this case is arthrodesis, which is not likely to be as effective.
Experimental/Investigational · 2006 · IMR EI06-5241
Nature of Statutory Criteria/Case Summary: An enrollee has requested authorization and coverage for platelet rich plasma (PRP) treatment (CPT 0232T). Findings: The physician reviewer found that This patient is being treated for osteoarthritis of the left ankle. The patient previously underwent left ankle arthrodesis peroneus longus and brevis tenolysis in 2019 with hardware removal in 2021. The patient presents with continued complaints of foot pain that is persistent and noted to be in the heel rated at 4/10 in the posterior aspect. The provider noted that the patient has been treated with physical therapy. The provider has recommended treatment with PRP injections. On review of the peer-reviewed medical literature, the data on PRP injections remains mixed with regard to efficacy in the treatment of patients with ankle arthritis.
Experimental/Investigational · 2022 · IMR EI22-36701

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 osteoarthritis of the ankle 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.

Fighting a denial for osteoarthritis of the ankle? 61.5% won.

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