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# § 9789.18.1 Payment for Anesthesia Services - General Payment Rule

Last update
February 24, 2020

### Summary

Calculating OMFS reimbursement for Anesthesia Services is a complex process that involves multiple tables and formulas.

To calculate the Base Maximum Fee for Anesthesia services, use these factors:

• Base Units
• Time Units
• Anesthesia Conversion Factor
• Statewide GAFs for Anesthesia

To determine these factors and calculate payment for anesthesia services, follow the instructions below.

#### Step 1. Determine Anesthesia Base Units

First, download the file titled 2014 Anesthesia Base Units by CPT Code [ZIP, 13KB] in the Anesthesiologists Center on the Medicare website. The anesthesia base units are unchanged for 2016.

#### Step 2. Determine Time Units

To determine Time Units, see Section 9789.18.8.

Time Units are calculated by dividing the actual reported anesthesia time by 15 minutes.

#### Step 3. Determine the Anesthesia Conversion Factor

The Anesthesia Conversion Factor (CF) is \$28.8003, located in § 9789.19, the Update Table.

#### Step 4. Determine the Statewide GAF for Anesthesia

The Statewide GAF for Anesthesia is 1.0313, located in § 9789.19, the Update Table on page 59.

#### Step 5. Calculate Base Maximum Fee

To calculate the Base Maximum Fee for anesthesia services, use the following equation:

[Base Unit + Time Unit] * CF * Statewide Anesthesia GAF = Base Maximum Fee

Because these factors frequently change, be sure to check the California fee schedule regulations often.

### California Code of Regulations (CCR)

§ 9789.18.1 Payment for Anesthesia Services - General Payment Rule

### Division of Workers’ Compensation Websites

Official Medical Fee Schedule

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