Two Workers’ Compensation Appeals Board decisions issued in the fourth quarter of 2025 are now driving 2026 Medical Provider Network practice. Both touched on the contested boundary between employer-controlled provider selection and the injured worker’s second-opinion rights.
The Network Validity Threshold
The first decision tightened the threshold for challenging MPN validity at the WCAB level. Pre-2025 practice tolerated procedural challenges based on relatively narrow defects — outdated provider rosters, expired credentialing files, geographic-access shortfalls. The Board signaled that future challenges will require the petitioner to demonstrate that the defect materially impaired the worker’s actual ability to obtain care, not merely that a defect existed on paper.
For applicant counsel, the practical adjustment is documentary. The challenge file now needs evidence of attempted appointments, denied referrals, or specific travel-distance failures — not just a roster audit.
Second-Opinion Mechanics
The second decision clarified the procedure for requesting a second-opinion within the network under Labor Code § 4616.3. The Board confirmed that the second-opinion request runs from the date the worker disagrees with the treating physician’s recommendation — not from the date of the underlying injury.
That seems mundane until you consider the delay-of-care defense employers have routinely run when second-opinion requests come months into treatment. The 2025 decision foreclosed that defense in most situations and reset the timing baseline.
What MPN Filings Look Like in 2026
The downstream effect is a more focused filing posture:
- Applicant filings emphasize the documentary record of attempted access — phone logs, scheduling-system screenshots, travel-distance calculations from the worker’s home address.
- Defense filings focus on demonstrating that the network was actually navigable for the specific injury at the specific time, not just that a network existed.
- Settlement valuations on disputed MPN cases have compressed toward the middle of pre-2025 ranges — fewer outliers on either end, more straight-line negotiation.
For California workers’ comp practice, the two decisions together are the most significant MPN-procedure shift since the network framework was introduced.