G0480 Definitive Drug Testing (HCPCS) Reimbursement | OpenPayer

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G0480 Definitive Drug Testing (HCPCS) Reimbursement | OpenPayer

GC/MS

LC/MS

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	When billing only the professional interpretation component provided by a laboratorian or pathologist separate from the facility technical work
`90`	Reference laboratory	When the service is performed by a reference laboratory distinct from the ordering/facility lab
`91`	Repeat clinical diagnostic laboratory test	When the definitive test is repeated on the same day for confirmation of prior analytic result
`52`	Reduced services	When a reduced or modified definitive panel is performed compared with the customary service
`59`	Distinct procedural service	When services on the same day are distinct and should be reported separately (e.g., separate specimen types)
`TC`	Technical component	When billing only the technical component of the laboratory testing (instrumentation, reagents, personnel)
`90`	(duplicate entry avoided)	(See above)
`90`	(Note: only listed once)	(Avoid duplicates)
`91`	(duplicate entry avoided)	(See above)
`90`	(duplicates removed)	(Final table limited to clinically relevant distinct modifiers)

Taxonomy Code	Specialty	Notes
`0000C0707X`	Clinical Laboratory Scientist	Performs and interprets definitive toxicology testing in laboratory settings
`207L00000X`	Addiction Medicine	Orders confirmatory drug testing for monitoring and treatment decisions
`208D00000X`	Emergency Medicine	Orders definitive testing in suspected overdose or acute intoxication cases
`363LA2200X`	Medical Toxicology	Consults on interpretation of complex toxicology results
`207K00000X`	Pain Medicine	Orders confirmatory testing for adherence monitoring in chronic opioid therapy

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`F11.20`	Opioid dependence, uncomplicated	Common indication for confirmatory testing to monitor opioid agonist therapy and illicit opioid use
`F11.21`	Opioid dependence, in remission	Monitoring during remission to detect relapse risk or recurrence
`F10.20`	Alcohol dependence, uncomplicated	Used when testing panels include ethyl glucuronide or other alcohol biomarkers alongside drug testing
`R78.0`	Abnormal drug test result	Common clinical finding prompting definitive confirmatory testing
`T40.4X5A`	Poisoning by synthetic narcotics, accidental (initial encounter)	Definitive testing used in overdose evaluation to identify specific synthetic opioids such as fentanyl
`Z51.81`	Encounter for therapeutic drug monitoring	Used when confirmatory testing is part of ongoing therapeutic monitoring for controlled medications
`Z91.19`	Patient's noncompliance with other medical treatment and regimen	May be cited when confirmatory testing documents non-adherence to prescribed therapy

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`80307`	Drug test(s), definitive, non-identified drug(s), multiple methods, qualitative or quantitative, any number of drug classes, includes specimen validity testing; 1–7 drug classes	Alternative definitive testing code sometimes used for non-isomer distinguishing methods; may be performed when LC/MS or GC/MS platforms are used in specific configurations
`80305`	Drug test(s), definitive, non-identified drug(s), single class method, qualitative or quantitative, includes specimen validity testing	Used when a single drug class definitive assay is ordered in addition to or prior to broader panel testing
`81002`	Urinalysis, by dipstick or tablet reagent; non-automated, without microscopy	Common point-of-care screen performed at specimen collection prior to sending confirmatory testing
`36415`	Collection of venous blood by venipuncture	Used when blood specimen is required for definitive testing for certain analytes (e.g., some quantitative confirmations)
`99000`	Handling and/or conveyance of specimen for transfer from the office to a laboratory	Billed when specimen transport services are separately reportable as part of the workflow