
As stated in Labor Code § 4610(a), utilization review is the process a defendant uses to "prospectively, retrospectively, or concurrently review and approve, modify, or deny, based in whole or in part on medical necessity to cure and relieve, treatment recommendations by physicians, ..." (emphasis added). UR is the process to determine only whether a request for treatment is medically necessary. It does not determine other issues.
LC 4610(l) states, "Utilization review of a treatment recommendation shall not be required while the employer is disputing liability for injury or treatment of the condition for which treatment is recommended pursuant to Section 4062." Accordingly, California Code of Regulations 9792.9.1(b) states that UR "may be deferred if the claims administrator disputes liability for either the occupational injury for which the treatment is recommended or the recommended treatment itself on grounds other than medical necessity." So a defendant is not required to submit a treatment recommendation to utilization review when a claim is denied or when it is disputing liability for reasons other than the reasonableness of the proposed care.