Deep Brain Stimulation denials in California external review

In the California DMHC record, independent physician reviewers decided 21 published external-review cases involving Deep Brain Stimulationand overturned the plan’s denial in 57.1%. That is a historical result among cases that reached this program, not a forecast for an individual appeal.

California DMHC decisions
21
2002–2025
Overturned
57.1%
12 denials reversed

Conditions behind Deep Brain Stimulation denials

What insurers denied — and how those fights ended.
CategoryDecisionsOverturned
Obsessive-compulsive Disorder5
80%
Parkinson's Disease3
100%

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.
17
58.8%
Medical Necessity
The plan said the care wasn’t medically necessary. The most common fight, and the most winnable.
4
50%
Typical time to a decision
11 days
Most land between 7 and 21 days
Handled as urgent
57.1%
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 1This patient is an 11-year-old female who has progressive dystonia secondary to DYT-1 genetic defect. She has pursued standard non-surgical treatment including Botox, Artane, Baclofen, and Klonopin with limited benefit. The patient’s providers have recommended deep brain stimulation evaluation and treatment. The Health Plan has denied authorization for deep brain stimulation therapy on the basis that it is considered experimental.Upon review of the submitted clinical information and the medical literature regarding deep brain stimulation therapy there is sufficient evidence to support the conclusion that deep brain stimulation therapy is likely to be more beneficial for this patient than standard therapy. The submitted literature demonstrates that deep brain stimulation has benefited some patients with progressive dystonia unresponsive to standard therapy.
Experimental/Investigational · 2004 · IMR EI04-3683
Findings: The physician reviewer found that Nature of Statutory Criteria/Case Summary: A patient has requested authorization and coverage for a deep brain stimulation device. Deep brain stimulation therapy is indicated for this patient’s obsessive-compulsive disorder (OCD). Deep brain stimulation has been shown in the medical literature to be very effective for OCD. Deep brain stimulation also gained U.S. Food and Drug Administration (FDA) approval for the treatment of chronic, severe, treatment-resistant OCD in adult patients who have failed at least three selective serotonin reuptake inhibitors (SSRIs). This patient meets the above criteria, and the patient is being recommended deep brain stimulation by the patient’s providers, psychologist, psychiatrist, and neurosurgeon. The patient has a nearly 40-year history of severe, treatment-resistant OCD.
Experimental/Investigational · 2025 · IMR EI25-44557

Where the denial was upheld

Worth reading too — these show what an appeal has to overcome.
Physician 1: This case concerns a 13-year-old male with Tourette’s syndrome and obsessive-compulsive behavior. The patient has been tried on various medications without significant benefit. He underwent deep brain stimulation in July 2006. The Health Plan has denied coverage for the procedure on the basis that it is considered investigational for treatment of Tourette’s syndrome.Tourette’s syndrome is a most difficult neuropsychiatric syndrome. It can be treated with a variety of combinations of medications with moderate success, as suggested and recommended recently by the Tourette’s Syndrome Association in New York. Presently, as cited in the submitted literature, deep brain stimulation is definitely experimental/investigational and may lead to serious unwanted and potentially fatal results.
Experimental/Investigational · 2006 · IMR EI06-5827
Nature of Statutory Criteria/Case Summary: A male enrollee has requested authorization and coverage for motor cortex stimulation, deep brain stimulator, or spinal peripheral stimulator. The Health Plan has denied this request indicating that the requested services are not medically necessary for treatment of the enrollee’s trigeminal neuralgia. Findings: The physician reviewer found that Review of the submitted documentation and relevant literature fails to demonstrate the medical necessity of the requested services. There is a lack of peer-reviewed studies that show the use of peripheral nerve stimulation results in long-term benefit. A study performed a retrospective review of the medical records on patients who were trialed and implanted with occipital nerve stimulator (ONS) systems at one institution.
Medical Necessity · 2017 · IMR MN17-24894

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 treatment 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 Deep Brain Stimulation, 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 Deep Brain Stimulation? Use the California record to prepare.

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