Summary & Overview

CPT 80336: Tricyclic and Cyclic Antidepressant Testing

CPT code 80336 represents laboratory testing that detects and measures three to five tricyclic and related cyclic antidepressant medications in a patient specimen. These tests support clinical management of psychiatric patients by confirming medication presence, adherence, potential overdose, or unexpected polypharmacy. Nationally, such toxicology and therapeutic drug monitoring codes matter for clinical decision-making, behavioral health integration, and laboratory reimbursement alignment.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of what CPT code 80336 covers, the clinical contexts in which it is used, and typical sites of service. The publication outlines common billing considerations, typical modifiers in use, and payer coverage patterns where available. It also situates the code within broader laboratory testing practice for psychiatric medication management.

This summary provides benchmarks and policy-relevant context to help health system billing staff, laboratory managers, and clinician leaders understand when CPT code 80336 is applied, how it relates to therapeutic drug monitoring workflows, and what clinical scenarios commonly prompt ordering. Data not available in the input.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 80336toxicologytherapeutic drug monitoringpsychiatric medication testinglaboratory billingclinical laboratorytricyclic antidepressantstoxicology panel

Billing Code Overview

CPT code 80336 describes a laboratory test in which a lab analyst measures the amount of, or detects the presence of, three to five tricyclic and other cyclic antidepressant medications in a patient specimen. This test identifies and quantifies psychiatric medications from the tricyclic and related cyclic antidepressant drug classes.

Service Type: Therapeutic drug monitoring / qualitative and quantitative toxicology testing

Typical Site of Service: Clinical laboratory or hospital laboratory (ambulatory or inpatient settings where blood or urine specimens are collected and analyzed)

Clinical & Coding Specifications

Clinical Context

A 35-year-old outpatient with a history of major depressive disorder presents for therapeutic drug monitoring after a recent change in antidepressant regimen. The clinician suspects either subtherapeutic dosing, nonadherence, or potential polypharmacy with older tricyclic or cyclic antidepressants. A blood specimen is collected in the clinic or outpatient laboratory and sent to the reference lab. The laboratory analyst performs a qualitative and/or quantitative panel to detect and measure three to five tricyclic and other cyclic antidepressants using validated methods (e.g., immunoassay, GC-MS, or LC-MS/MS). Results are reported to the ordering clinician, who uses concentrations to assess adherence, toxicity risk, drug interactions, or to guide dose adjustments. Typical sites of service include hospital outpatient laboratories, independent clinical reference laboratories, and ambulatory clinics with specimen collection and reporting workflows.

Coding Specifications

Modifier	Description	When to Use
`00`	Default/standard — no modifier	Use when no special circumstance applies and full global service is billed.
`26`	Professional component	Use when only the professional interpretation/reporting portion is billed separately from the technical laboratory component.

Taxonomy Code	Specialty	Notes
207RH0000X	Pathology & Laboratory Medicine	Clinical laboratory directors and pathologists overseeing toxicology testing and result interpretation.
2085P0200X	Clinical Pathology	Laboratory medicine specialists who supervise toxicology assay validation and reporting.
207K00000X	Psychiatry & Neurology	Psychiatrists who order tricyclic/cyclic antidepressant panels for therapeutic monitoring or toxicity assessment.
2084P0800X	Toxicology	Toxicologists or clinical chemists who design and interpret multi-drug antidepressant assays.
363L00000X	Clinical Laboratory	Clinical laboratory technologists and managers performing the technical testing.

CPT Code	Description	Relationship to This Procedure
`80336`	Tricyclic and other cyclic antidepressant panel, 3–5 analytes; qualitative or quantitative	This is the primary code for detecting/measuring three to five tricyclic and cyclic antidepressants in a patient specimen.
`80307`	Drug assay, presumptive, any number of drug classes; e.g., immunoassay(s)	Often performed as an initial presumptive screen before confirmatory testing with `80336`.
`80305`	Drug assay, quantitative, multiple drugs, presumptive or confirmatory methods	May be used for quantitative measurement of individual antidepressant levels when a broader or different panel is required.
`80311`	Drug confirmation, definitive; e.g., GC-MS, LC-MS; single or multiple analytes	Used to confirm positive or ambiguous `80336` results with definitive methods and specific analyte quantitation.
`G0480`	Toxicology testing (clinical laboratory) — not specific to antidepressants	May be used for specialized or bundled toxicology services depending on payer policy and lab reporting arrangements.

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