Effective January 1st, 2016, Medicare’s Final Determination – which the California DWC adopted and incorporated – made seven changes to Drug Testing.

As of January 1st, 2016, Medicare’s Final Determination deleted the following drug testing codes:

• G0431
• G0434
• G6030 through G6058

To replace the deleted codes, there are seven new G-codes for drug testing.

3 New Procedure Codes for Presumptive Drug Testing:

1. G0477
2. G0478
3. G0479

NOTE: Only 1 of the 3 presumptive codes allowed per day.

The table below lists the reimbursements for the new presumptive G-codes.

4 New Procedure Codes for Definitive Drug Testing:

1. G0480
2. G0481
3. G0482
4. G0483

NOTE: Only 1 of the 4 definitive codes allowed per day.

The table below lists the reimbursements for the new definitive G-codes.

Drug Classes = AMA CPT Manual

Medicare’s Final Determination uses the drug classes listed in the AMA CPT Manual.

Division of Workers’ Compensation Websites

DWC Official Medical Fee Schedule

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