What Is California Labor Code §4603.2: Medical Bill Payment?

If the only dispute is the amount of payment and the provider does not request a second review within 90 days, the bill shall be deemed satisfied and neither the employer nor the employee shall be liable for any further payment.

What does California Labor Code 4603.2 cover?

Section 4603.2 covers the paperwork and deadlines between your doctor and the claims administrator, not a bill sent to you.

Once your claim is accepted and treatment is authorized under Labor Code 4600, your treating doctor or hospital sends an itemized bill to the claims administrator. This statute sets the rules for that bill. It states what the provider must include, how fast the claims administrator must respond, and what happens if the two sides disagree on the amount owed.

This law is aimed at the provider and the claims administrator. You are not expected to track billing codes or chase down payment yourself.

How does my doctor's bill reach the claims administrator?

Your doctor bills the claims administrator directly, and the administrator must send back a written response.

If you switch to a new treating doctor, tell your claims administrator. Labor Code section 4603.2(a)(1) requires you or the new doctor to notify your employer of that doctor's name and address, and in practice that notice goes to the claims administrator handling your claim. That step lets the administrator request your medical reports and pay for your care. From there, the provider's office bills the claims administrator on the required forms. It is not a bill mailed to your home.

When the claims administrator pays, reduces, or denies part of a bill, it must send the provider a written explanation of review. That notice is described in section 4603.3. It must explain the deadline for a further objection and how to ask for independent bill review.

What is a second review, and what is the deadline?

A second review is the provider's first appeal step when it disputes the dollar amount paid, and it must be requested within 90 days.

Say your doctor's office believes the claims administrator paid too little on an authorized bill. The office can ask for a second review of that bill. Labor Code section 4603.2(e) gives the provider 90 days from the written explanation of review to make that request. The claims administrator then has 14 days to issue a final written decision, and it must pay any part of the bill that is no longer disputed within 21 days of the request. Regulations at title 8, section 9792.5.5 spell out the forms and mailing rules for making that request.

The quoted rule above protects you directly. If the provider misses the 90 day window, the law treats the bill as settled, and neither the claims administrator nor you owe anything further on it.

What happens if the dispute is not resolved after second review?

The provider can take an unresolved dollar dispute to independent bill review, a process that does not involve you.

If the second review does not settle the disagreement, the provider can request independent bill review, often called IBR, under Labor Code section 4603.6. Regulations at title 8, section 9792.5.7 give the provider 30 calendar days from the second review decision to file that request. The request comes with a $335 fee that the provider pays. A reviewer assigned under the regulations then decides only the dollar amount owed under the fee schedule that applies.

IBR only decides the price of care that was already authorized and accepted. It is different from utilization review under section 4610, which decides whether treatment is medically necessary in the first place. It is also different from independent medical review under section 4610.5, the usual appeal when treatment itself is denied. If your claims administrator refused to authorize care, rather than disputing a paid amount, those guides fit your situation better.

Will I ever be billed personally for my accepted treatment?

Usually not. A different law, Labor Code section 3751(b), bars your provider from billing you once you have filed a claim and the provider knows about it, unless your claim is later denied in writing.

The state's own guidebook for injured workers is direct about this. It states that an injured worker should never receive a medical bill once a claim form is filed and the doctor knows the injury is work related, and that billing a worker directly is illegal under Labor Code section 3751(b). That protection lasts only while your claim is pending. It stops applying once your employer has rejected the claim in writing and the provider has a copy of that written rejection. The steps on this page happen between your doctor and the claims administrator. They are not supposed to turn into a bill addressed to you.

If a bill or collection notice still arrives, keep it. Do not pay it before checking, and do not ignore it either. Send a copy to the claims administrator with your claim number. Ask the provider's billing office to confirm it has that claim information on file. A bill that follows a written denial fits the exception above, and it is a different problem. Our guide to medical bills after a workers' comp denial walks through that situation. A provider that later files a lien in your case is also a separate process from the one described here. See our guide to workers' comp lien claims for that topic.

If a medical bill, a lien, or a billing dispute is complicating your California workers' compensation claim, Yazdchi Law P.C. can review the notices and explain what each one means for your case. Call (661) 273-1780 or use our contact form to request a free initial review. The firm reviews each matter's own facts before deciding whether to take a case.