Workers’ Compensation · Primary-source case analysis

Dubon III: Untimely Utilization Review Returns Medical Necessity to the WCAB

By Aneeta Mishra and Timothy Chan

Published April 15, 2026

Dubon III drew a bright jurisdictional line between a late utilization-review decision and alleged defects in a timely review.

A dispute over requested spinal treatment

Jose Dubon’s treating physician requested authorization for spinal surgery and related treatment. The employer’s utilization-review process denied authorization. The workers’ compensation judge found defects in the review and decided medical necessity rather than sending the dispute through independent medical review.

Reconsideration narrowed the Board’s earlier rule

The WCAB rescinded its earlier February 2014 en banc formulation, which had allowed the Board to invalidate utilization review for some material procedural defects. On reconsideration, it held that invalidity outside IMR turns on timeliness: an untimely decision is the equivalent of no utilization review.

Who decides which issue

The WCAB decides whether the utilization-review determination was timely. When it was timely, disputes over medical necessity—including most alleged procedural defects—are resolved through IMR. When it was untimely, the WCAB may decide medical necessity based on substantial medical evidence.

Disposition and practical limit

The WCAB affirmed the judge’s award because the utilization-review decision at issue was untimely and substantial medical evidence supported the treatment. Dubon III does not allow every error in a timely review to bypass IMR.

Key takeaways

• Calculate the statutory utilization-review deadline from the documented request and receipt dates.
• The WCAB determines timeliness.
• An untimely decision permits the WCAB to decide medical necessity on substantial evidence.
• Other disputes over a timely determination generally proceed through IMR.