In this guide9 sections
Labor Code §4616 lets an employer or its insurer set up a Medical Provider Network (MPN), a state-approved group of doctors that injured workers generally must use for treatment. Employers don’t have to have an MPN, but if a valid one covers you, you usually treat inside it, choosing your own doctor from the network after the first visit. The law and DWC regulations also set access standards: enough doctors near your home or work, a first appointment within 3 business days and a specialist within 20 business days. When the MPN can’t meet those standards, you may be able to treat outside it.
Key takeaways
- An MPN must be approved by the Division of Workers’ Compensation (DWC), post a provider roster updated at least quarterly, and offer medical access assistants by toll-free phone 7 a.m. to 8 p.m. Pacific, Monday through Saturday.
- After your first visit, you can switch to another doctor of your choice inside the MPN.
- If you disagree with an MPN doctor’s diagnosis or treatment plan, you can get second and third opinions inside the MPN, then request MPN independent medical review (Labor Code §§4616.3, 4616.4).
- You may treat outside the MPN in specific situations, such as when no specialist appointment can be scheduled within 10 business days or the MPN lacks the specialty you need.
What Labor Code §4616 requires
Section 4616 and the sections after it (§§4616.1–4616.7), together with DWC regulations in Title 8 of the California Code of Regulations (§§9767.1–9767.19), set the rules for MPNs:
- Enough of the right doctors (§4616(a)(1)). The network must include physicians primarily engaged in treating work injuries, and enough of them to provide treatment in a timely manner.
- Public roster (§4616(a)(4)). Each MPN must post a roster of its participating providers on its website and update it at least quarterly.
- Medical access assistants (§4616(a)(5)). Each MPN must have assistants who help you find and schedule doctors, reachable at a toll-free number from 7 a.m. to 8 p.m. Pacific time, Monday through Saturday.
- State approval (§4616(b)). The DWC’s Administrative Director approves an MPN plan for four years; a plan not acted on within 60 days is deemed approved. Approval can be suspended or revoked, any person may petition the Administrative Director to suspend or revoke an MPN’s approval, and penalties of up to $5,000 per violation or probation may be used instead for less severe violations, after notice and a chance to be heard.
- Enforcement (§4616(i)). The Administrative Director may investigate complaints, conduct random reviews and take enforcement action against MPNs.
Access standards
| Standard | Requirement (8 CCR §9767.5) |
|---|---|
| Primary treating physicians | At least three available within 30 minutes or 15 miles of your home or workplace, plus an emergency care provider |
| Specialists | Within 60 minutes or 30 miles of your home or workplace |
| First treatment visit (non-emergency) | Available within 3 business days of your request |
| Initial specialist appointment | Available within 20 business days of a reasonable request |
When you can treat outside the MPN
- No timely specialist. If the medical access assistant can’t schedule a timely specialist appointment within 10 business days, the employer must let you get necessary treatment from an appropriate specialist outside the MPN.
- Access standards not met. If you can’t get reasonable and necessary treatment from an MPN doctor within the access standards, the MPN must have a policy allowing outside treatment.
- Missing specialty. If your treating doctor refers you to a type of specialist the MPN doesn’t include, you may choose one outside the MPN.
- MPN independent medical review. If the reviewer finds the disputed treatment consistent with the Medical Treatment Utilization Schedule, you may get it from a doctor of your choice inside or outside the MPN (§4616.4(i)).
Your employer must tell you about the MPN, your right to change doctors within it after the first visit, and how to find the provider list. Under §4616.3(b), a failure to give that notice lets you treat outside the MPN only if it resulted in a denial of medical care. If you predesignated your own personal physician in writing before the injury and meet the requirements of Labor Code §4600(d), different rules may apply; see can I choose my own doctor.
Disputing an MPN doctor’s diagnosis or treatment
If you disagree with your MPN doctor’s diagnosis or treatment plan, you can ask for a second opinion from another MPN doctor, and then a third. If the dispute continues, you can request MPN independent medical review by filing a one-page application. The reviewer may examine you and decides whether the disputed service is consistent with the treatment schedule; the report is due within 30 days of the exam, or 3 days if there’s an imminent and serious threat to your health.
This process is different from utilization review, where the insurer decides whether to approve a specific treatment request, and from QME disputes over issues like work status. See Labor Code §4062 objections for how those disputes are routed.
Here is a hypothetical. Jorge hurts his shoulder on a construction site. His MPN doctor recommends only physical therapy, but Jorge’s pain is getting worse. He asks the medical access assistant for an orthopedic surgeon and is told the earliest appointment is in five weeks. Because the MPN couldn’t schedule a timely specialist within 10 business days, Jorge may be entitled to see an appropriate specialist outside the network. He should put the request and the response in writing.
What about Labor Code §139.21?
Section 139.21 isn’t an MPN rule, but it affects which providers can treat you. It requires the Administrative Director to suspend doctors and other providers from the workers’ comp system for certain fraud- or abuse-related convictions, suspensions from Medicare, Medicaid or Medi-Cal, or surrender or revocation of a health care license. The provider gets notice and a chance for a hearing, and suspensions are posted on the Department of Industrial Relations website and reflected in the MPN and QME databases. If your doctor is suspended, you’ll need a new treating physician.
Steps to take if your MPN isn’t working
- Ask the claims administrator for the MPN’s name, website and medical access assistant number.
- Request appointments through the medical access assistant and write down the date, time and response.
- If you want a different doctor, choose one from the roster after your first visit. See how to change your doctor in the MPN.
- If the network is too thin or noncompliant, raise it in writing; our guide to invalid or noncompliant MPNs explains how.
Frequently asked questions
Does my employer have to use an MPN?
No. Section 4616 says an employer or insurer may establish one. If there’s no MPN, different rules govern your choice of doctor. For the basics, see what an MPN is.
Can I pick my doctor in an MPN?
Yes, after the first visit you may change to another doctor of your choice within the network, ideally one with expertise in your type of injury.
How do I find out if an MPN is approved?
The DWC posts the website address of each approved MPN, and every MPN must post its provider roster online.
What if no MPN doctor will treat my condition?
If the MPN has no doctor who can provide the approved treatment, or doesn’t include the specialty you were referred to, you may be able to treat outside the network.
Talk to a California workers’ comp lawyer
Employees First Labor Law represents workers exclusively in workers’ comp cases across California. We offer free virtual consultations if your MPN is delaying or denying care. Contact us or call (310) 853-3461. The DWC Information and Assistance Unit also gives free help to injured workers.
This article is general information about California law as of 2026, not legal advice for your situation. Reading it does not create an attorney-client relationship.
