Type 2 Diabetes Mellitus denials in California external review

In the California DMHC record, independent physician reviewers decided 150 published external-review cases involving type 2 diabetes mellitusand overturned the plan’s denial in 74.7%. That is a historical result among cases that reached this program, not a forecast for an individual appeal.

California DMHC decisions
150
2005–2026
Overturned
74.7%
112 denials reversed

Most-fought treatments for type 2 diabetes mellitus

What insurers denied — and how those fights ended.
TreatmentDecisionsOverturned
Mounjaro57
82.5%
Ozempic18
88.9%
Byetta13
30.8%

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.
144
76.4%
Experimental/Investigational
The plan called the treatment unproven. These turn on published evidence, so the appeal is a literature argument.
6
33.3%
Typical time to a decision
14 days
Most land between 5 and 21 days
Handled as urgent
34.7%
Expedited when a delay would cause harm
Recent direction
Rising
75%81.8% 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

Findings: The physician reviewer found that Nature of Statutory Criteria/Case Summary: The patient has requested authorization and coverage for Mounjaro. A researcher explains, “Tirzepatide (Mounjaro™) is a single molecule that combines dual agonism of glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) receptors. Native GIP and GLP-1 are incretin hormones that stimulate insulin secretion and decrease glucagon secretion. GIP also plays a role in nutrient and energy metabolism, while GLP-1 also delays gastric emptying, suppresses appetite, and improves satiety. Eli Lilly is developing tirzepatide for the treatment of type 2 diabetes mellitus (T2DM), obesity, cardiovascular disorders in T2DM, heart failure, non-alcoholic steatohepatitis, obstructive sleep apnea and for reducing mortality/morbidity in obesity.
Medical Necessity · 2024 · IMR MN24-42022
Nature of Statutory Criteria/Case Summary: The patient has requested authorization and coverage for (1) Ozempic and/or (2) Dexcom G6 continuous glucose monitor (CGM) system. Researchers report that diabetes, a chronic disease that is often accompanied by multiple comorbidities and health complications, is the seventh leading medical cause of death in the United States. The U.D. Food and Drug Administration (FDA) approves using Ozempic (semaglutide) to lower blood sugar in patients with type 2 diabetes mellitus. Researchers report that clinical research showed that when Ozempic was added to other standard therapies for patients with a history of type 2 diabetes mellitus, these patients saw a substantial decrease in their A1c levels. The A1c cut-off goal for the trial was set at greater than or equal to 7.0.
Medical Necessity · 2024 · IMR MN24-41656

Where the denial was upheld

Worth reading too — these show what an appeal has to overcome.
Findings: The physician reviewer found that the patient has requested authorization and coverage for medically tailored meals. The Food is Medicine Coalition describes medically tailored meals as medically appropriate meals delivered to the homes of individuals living with complex, severe, or chronic illnesses who are too sick to shop or cook for themselves. These meals are supervised by registered dieticians and tailored toward the specific nutritional needs of eligible recipients. Nutrition and diabetes are intricately intertwined. Authors report that the foundation of medical nutrition therapy for type 2 diabetes is to achieve glucose, lipids, and blood pressure within the target range to prevent, delay, or manage microvascular and macrovascular complications.
Medical Necessity · 2024 · IMR MN24-42723
Nature of Statutory Criteria/Case Summary: An enrollee has requested authorization and coverage for Mounjaro. Diabetes mellitus is a common, albeit potentially devastating, medical condition that has increased in prevalence over the past few decades to constitute a major public health challenge in the twenty-first century. The mortality rate for patients with diabetes is one and a half times higher than for individuals without diabetes. Tirzepatide (brand name Mounjaro), a glucose-dependent insulinotropic polypeptide (GIP) receptor and glucagon-like peptide-1 (GLP-1) receptor agonist, is approved by the U.S. Food and Drug Administration (FDA) for the treatment of type 2 diabetes mellitus, along with diet and exercise, based on clinical data demonstrating that tirzepatide is superior to placebo in improving hemoglobin (Hb) A1C levels.
Experimental/Investigational · 2024 · IMR EI24-41037

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 condition 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 type 2 diabetes mellitus, 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.

Fighting a denial for type 2 diabetes mellitus? Use the California record to prepare.

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