California Framework
State rules that can shape the appeal
These protections are most relevant for California-regulated plans and clinical denials involving medical necessity, experimental treatment, or urgent care.
Utilization Review Standards
Cal. Health & Safety Code § 1367.01 This statute mandates that only a licensed physician or competent licensed health professional of similar specialty can deny or modify a claim based on medical necessity. It requires insurers to make retrospective decisions within 30 days and prospective/urgent decisions within 72 hours. Crucially, the written denial notice must disclose the specific clinical criteria used and include the direct phone number or extension of the responsible reviewing clinician.
Prompt Payment Regulations
Cal. Health & Safety Code § 1371 Under this prompt-pay mandate, health care service plans must reimburse complete electronic claims within 30 calendar days (or 45 working days for paper claims). If a carrier contests or denies a claim, they must do so within 30 calendar days. Failure to meet these deadlines triggers an automatic obligation to pay late interest on the claim at an annual rate of 10%.
The Right to an Unbiased External Audit
DMHC Independent Medical Review If your insurer upholds a clinical denial, you can bypass their internal systems by filing for an IMR through the DMHC. This process is free to consumers. An independent panel of medical specialists reviews your case, and their decision is legally binding on the insurance company. Per DMHC's 2024 Annual Report, in approximately 73% of IMR cases the health plan's denial was reversed by the plan or overturned by the Independent Medical Review Organization, and the enrollee received the requested service or treatment. (This is DMHC's health-plan IMR program. A separate, unrelated program handles California workers'-compensation IMR and has a much lower overturn rate.)
