Table 1.

Selected CPT and HCPCS G codes for UDM [44, 50]

Test Type	Description	AMA CPT Code	CMS HCPCS G Code
Presumptive
	Read by direct optical observation only	80305	G0477
	Instrument-assisted direct optical observation	80306	G0478
	Performed by instrument chemistry analyzers	80307	G0479
Definitive
	1–7 drug classes	Individual CPT codes for each drug	G0480
	8–14 drug classes		G0481
	15–21 drug classes		G0482
	≥22 drug classes		G0483

AMA = American Medical Association; CMS = Centers for Medicare and Medicaid Services; CPT = Current Procedural Terminology; HCPCS = Healthcare Common Procedure Coding System; UDM = urine drug monitoring.