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Hyperbaric Oxygen Therapy denials: what the review data shows

Independent reviewers have decided 81 published cases where an insurer denied Hyperbaric Oxygen Therapy — and they overturned the insurer 33.3% of the time. A denial for Hyperbaric Oxygen Therapy is a starting position, not a final answer.

Published decisions
81
2001–2026
Overturned
33.3%
27 denials reversed

Conditions behind hyperbaric oxygen therapy denials

What insurers denied — and how those fights ended.
CategoryDecisionsOverturned
Osteomyelitis6
50%
Diabetic Foot Ulcer5
40%

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.
47
27.7%
Experimental/Investigational
The plan called the treatment unproven. These turn on published evidence, so the appeal is a literature argument.
34
41.2%
Typical time to a decision
20 days
Most land between 7 and 22 days
Handled as urgent
39.5%
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

Physician 1: The patient is a 61-year-old male who in 1999 was diagnosed with prostate cancer with a Gleason score total of 7. He underwent radical retropubic prostatectomy with bilateral pelvic lymphadenectomy. Surgical margins were positive for cancer, and there was invasion of both seminal vesicles with a positive pelvic lymph node on the right side. He then underwent external beam radiation therapy for the prostate cancer. In July 2005, he was hospitalized because of abdominal pains and in July 2005 underwent laparotomy and sigmoid colon resection for poorly differentiated prostate adenocarcinoma invading the sigmoid colon. The patient also had mild left hydronephrosis and mild renal insufficiency, with BUN of 28 and creatinine of 2.0.
Experimental/Investigational · 2005 · IMR EI05-5007
Physician 1: The patient is a 69 year old female that was diagnosed with breast cancer in March 1995. She was treated with lumpectomy and radiation. Subsequently, she was diagnosed with a rectal tumor in October 1995 and underwent surgery followed by chemotherapy and radiation therapy. The patient has developed radiation necrosis with soft tissue groin and perineal breakdown of a chronic nature such that blood transfusions and laser therapy have been necessary. Her provider has recommended hyperbaric oxygen (HBO) therapy for treatment of the patient’s non-healing wound.
Experimental/Investigational · 2006 · IMR EI06-6015

Where the denial was upheld

Worth reading too — these show what an appeal has to overcome.
Physician 1: This patient is a 54-year-old male diagnosed with Crohn’s disease that has recurrent pouchitis and severe perianal lesions. He has failed 6-mercaptopurine (6-MP), mesalamine (5-ASA) compounds and biologics including Remicade and Humira. The patient has been on high doses of oral steroids and has required frequent inpatient treatment. He has had an overall poor response to medical management. The patient’s provider requested authorization for hyperbaric oxygen therapy indicating it has provided some symptom relief for the patient in the past. The health plan has classified this treatment approach as investigational and denied the request for authorization and coverage. The patient has severe, refractory Crohn’s disease as evidenced by recurrent pouchitis and significant perianal involvement.
Experimental/Investigational · 2006 · IMR EI06-5959
Physician 1: The patient is a 75-year-old male with a long history of a non-healing diabetic foot ulcer on the plantar left foot. His provider reports standard treatment modalities have been ineffective. The patient’s provider further states the patient has benefited from use of hyperbaric oxygen therapy. The Health Plan has denied coverage for hyperbaric oxygen therapy on the basis it is considered experimental for treatment of the patient’s condition. Review of the scientific evidence reveals there have been few trials involving hyperbaric oxygen therapy for diabetic ulcers. There is insufficient evidence hyperbaric oxygen therapy is superior to standard treatment modalities. In general there is limited quality data on the benefits of many of the therapies for diabetic ulcers. However, Regranex in sub-atmospheric oxygen dressing has been shown to be effective.
Experimental/Investigational · 2005 · IMR EI05-4356

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 Hyperbaric Oxygen Therapywhen 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.

Denied Hyperbaric Oxygen Therapy? 33.3% got it reversed.

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