Skip to Main Content

This information is provided free of charge by the Department of Industrial Relations from its web site at These regulations are for the convenience of the user and no representation or warranty is made that the information is current or accurate. See full disclaimer at
Chapter 4.5. Division of Workers' Compensation
Article 5.3. Official Medical Fee Schedule
New Query

§9789.18.6. Anesthesia - Multiple Anesthesia Procedures.

(a) Physicians and non-physician practitioners shall bill for the anesthesia services associated with multiple bilateral surgeries by reporting the anesthesia procedure with the highest base unit value with the multiple procedure modifier “-51.” The total time for all procedures shall be reported in the line item with the highest base unit value.

(b) If the same anesthesia CPT code applies to two or more of the surgical procedures, billers enter the anesthesia code with the “-51” modifier and the number of surgeries to which the modified CPT code applies.

(c) Payment can be made under the fee schedule for anesthesia services associated with multiple surgical procedures or multiple bilateral procedures. The maximum fee is determined based on the base unit of the anesthesia procedure with the highest base unit value and time units based on the actual anesthesia time of the multiple procedures.

Note: Authority: Sections 133, 4603.5, 5307.1 and 5307.3, Labor Code. Reference: Sections 4600, 5307.1 and 5307.11, Labor Code.


1. New section filed 9-24-2013; operative 1-1-2014. Submitted to OAL as a file and print only pursuant to Government Code section 11340.9(g) (Register 2013, No. 39).

Go BackGo Back to Article 5.3 Table of Contents