California’s Division of Workers’ Compensation posted third-quarter adjustments to the Official Medical Fee Schedule (OMFS) for physician and non-physician practitioner services on June 24, 2026. The July 1 administrative director order, dated June 16, adopts the Q3 Medicare Physician Fee Schedule Database update, Practitioner Procedure to Procedure (PTP) edits, and Medically Unlikely Edits (MUE) for services rendered on or after July 1.
A separate June 15 order, also dated June 16, adopts the monthly Medi-Cal rates file for physician-administered drugs, biologicals, vaccines, and blood products. Together, these are not just California workers compensation fee schedule housekeeping. They change the reimbursement basis for medical services that may already be sitting inside open case reserves.
Who it affects
Self-insured California employers, public entity joint powers authorities, hospital systems, universities, retailers, manufacturers, construction firms, and single-parent captives with California workers compensation claims should focus on files still receiving treatment. Multi-state employers should not blend this into a national medical trend pick until they know how much of their open medical inventory is California service-date exposure.
The DWC Medical Unit matters here because it oversees the independent medical review, independent bill review, utilization review, medical provider network, and OMFS functions that shape how treatment disputes and medical bills move through the system. A claim can be old by accident date but current by treatment plan.
Reserve mechanism: medical severity and case adequacy
The July order conforms California OMFS 2026 physician services to CMS Transmittal 13777, Change Request 14484, the July 2026 Medicare Physician Fee Schedule Database update. It adopts RVU26C and related Q3 files, plus four Practitioner PTP edit files with 675,037, 675,235, 674,890, and 608,227 records. That is 2,633,389 PTP edit records before the MUE table is even considered.
For reserving, the key lever is medical severity, meaning expected cost per treatment episode, and case adequacy, meaning whether the adjuster’s current open medical reserve is enough for known future care. The update flows through by date of service. A 2024 accident year claim with therapy, injections, physician follow-up, or administered biologics after July 1 belongs partly under the new pricing and edit environment.
That can create a timing mismatch in the actuarial report. Paid medical development may not show the new level until bill review and payment lag catch up. Case reserves can move earlier if the third-party administrator reprices future treatment plans. If many California files strengthen at once, the reported triangle may show a case-reserve shift rather than true new claim frequency. The diagnostic is the same one described in the case reserve strengthening guide, but the trigger is a fee schedule update, not an adjuster philosophy change.
The best comparison is not statewide premium movement. It is your own California open-claim service mix. Recent California self-insured data already show why frequency alone is a weak comfort signal, as discussed in the private self-insured loss and medical cost piece and the public self-insured medical severity piece. The OMFS update is narrower, but it points to the same reserve discipline: separate claim counts from treatment cost.
What this means for your next review
At the next reserve study or interim monitoring meeting, ask for a California medical split by service date before and after June 15 and July 1, not only by accident year. Have the TPA identify open lost-time claims with physician services, physician-administered drugs, biologicals, vaccines, or blood products, then compare current case reserves with the new bill-review assumptions. If the actuary is relying on aggregate paid medical development, ask whether the workers compensation IBNR analysis needs a California service-mix adjustment before the year-end study.
Sources
- California DWC Newsline, June 24, 2026: https://www.dir.ca.gov/DIRNews/2026/2026-49.html
- California DWC Official Medical Fee Schedule page: https://www.dir.ca.gov/dwc/omfs9904.htm
- DWC order, physician services, effective July 1, 2026: https://www.dir.ca.gov/dwc/FeeSchedules/Physician/PhysicianFeeSchedule/2026/Orders/Order-July-1.docx
- DWC order, physician services, effective June 15, 2026: https://www.dir.ca.gov/dwc/FeeSchedules/Physician/PhysicianFeeSchedule/2026/Orders/Order-June-15.docx
- CMS Transmittal R13777CP, Change Request 14484: https://www.cms.gov/medicare/regulations-guidance/transmittals/2026-transmittals/r13777cp
- California DWC Medical Unit resources: https://www.dir.ca.gov/dwc/MedicalUnit/imchp.html