How California's Fee Schedule Applies to Out‑of‑State Workers' Compensation Injuries Treated in‑State

Jurisdictional rule: California fee schedule applies when treatment is in‑state

If an employee is injured while working in another state but receives medical care in California, the California workers' compensation fee schedule governs the reimbursement of those services, provided the employer is subject to California law or the claim is filed in a California workers' compensation court.

Key factors that trigger California's fee schedule

Three elements determine whether California's schedule applies:

• Employer's connection to California – a California‑based employer, or an out‑of‑state employer who has a qualified California worksite, is liable under California law.
• Location of medical treatment – services rendered by a California‑licensed provider in California are priced using the state's fee schedule.
• Filing of the claim – the claim must be lodged in a California workers' compensation proceeding; otherwise the originating state's rules may control.

Effect on medical billing and reimbursement

When the fee schedule applies, providers bill according to the California Workers' Compensation Medical Fee Schedule (MWC‑MFS). The schedule sets maximum allowable amounts for each CPT code, adjusted for geographic factors. Insurers and the Workers' Compensation Appeals Board (WCAB) enforce these limits, and any amount above the schedule must be approved as a supplemental benefit.

When supplemental benefits are possible

Supplemental benefits may be awarded if the treating physician documents that the standard schedule amount is insufficient to cover necessary care. Approval requires a written request, supporting medical evidence, and often a hearing before the WCAB.

Interaction with the out‑of‑state employer's workers' comp system

If the employer's home state also has a fee schedule, the two systems can conflict. California law generally prevails for treatment occurring in California, but the employer may still be liable for any "excess" charges not covered by the California schedule, depending on the terms of the employer's workers' compensation insurance and any interstate compacts in place.

Practical steps for injured workers and providers

1. Verify the employer's workers' compensation coverage jurisdiction.2. Ensure the treating provider is aware the claim is filed in California and will bill using the MWC‑MFS.3. If a provider anticipates costs above the schedule, submit a supplemental benefit request early.4. Keep detailed records of all medical services, communications, and approvals to support any disputes.

Comparison of fee‑schedule applicability