“Eman at Yazdchi Law was extremely professional, responsive, and supportive at all times. He and his staff exceeded all of my expectations.”
Andrea Dalessandro
✦ Certified Specialist in Workers’ Compensation Law — Certified by the State Bar of California, Board of Legal Specialization ✦
Serving injured workers across California. Board-certified specialist; no fee unless we win.
By Eman Yazdchi, Esq. · Certified Specialist in Workers' Compensation Law, State Bar of California Board of Legal Specialization
In California, Labor Code §4616 authorizes the Medical Provider Network (MPN) — the insurer-curated panel of physicians from which an injured worker must generally select a Primary Treating Physician. Treatment outside the MPN after proper notice is generally not paid. Yazdchi Law handles California MPN access disputes statewide.
California Labor Code §4616 authorizes the California Medical Provider Network (MPN) — each workers' compensation employer or insurer may establish or modify a panel of physicians from which the injured worker selects a Primary Treating Physician under California Labor Code §4600 and obtains all subsequent treatment. After the first 30 days (or earlier if predesignated), §4616 California treatment outside the MPN is generally non-compensable. The §4616 structure was the legislature's effort to control treatment costs while preserving worker choice within the panel.
Under California Labor Code §4616, once a California workers' compensation insurer properly notices the MPN to the injured worker — by mail with the required MPN packet — treatment under California Labor Code §4600 must generally be obtained from physicians on the MPN list. Treatment outside the MPN after proper §4616 notice is generally not paid. The MPN must provide an adequate number of physicians within reasonable geographic distance, with primary care and specialty access. The §4616 network is the treatment-channel statute.
Under California Labor Code §4616, the California MPN controls which physicians the injured worker may see; under California Labor Code §4610, Utilization Review controls which treatments are authorized. The two systems work together — the MPN is the panel, UR is the gatekeeper. A California Primary Treating Physician on the §4616 MPN must still submit Requests for Authorization through §4610 UR, and a UR denial is appealed through Independent Medical Review under California Labor Code §4610.5 within 30 days.
When a California §4616 MPN cannot provide a physician in the specialty required — a hand surgeon, a pain management specialist for chronic pain, a psychiatrist for a psychiatric claim under California Labor Code §3208.3 — the injured worker may treat outside the MPN at the insurer's expense under California Labor Code §4600. The California insurer's failure to maintain adequate §4616 specialty access voids the MPN restriction for that specialty. The worker can also use the Section 4616.3 second-opinion / third-opinion process within the MPN.
Under California Labor Code §4600 and California Labor Code §4616, a California employee may predesignate a Primary Treating Physician — typically the worker's regular personal physician — in writing before an industrial injury. A valid §4600 predesignation overrides the §4616 MPN restriction, and the California worker may treat with the predesignated physician outside the MPN. Predesignation requires the named physician to agree in advance, have the worker's medical history, and the employer to receive notice before the injury.
Injured at work? Call (661) 273-1780
Tap to call →Last reviewed by Eman Yazdchi, Esq., May 2026.
Ready to discuss your case? Schedule a free consultation.
Schedule Free ConsultationRead more testimonials →“Eman at Yazdchi Law was extremely professional, responsive, and supportive at all times. He and his staff exceeded all of my expectations.”