Summary & Overview
CPT 83992: Phencyclidine (PCP) Quantitative Toxicology Assay
CPT code 83992 represents a laboratory toxicology assay to detect and measure phencyclidine (PCP) levels in biological specimens such as urine or blood. This code is clinically important for emergency medicine, inpatient care, behavioral health, occupational testing, and forensic evaluations where identification of PCP exposure affects diagnosis, patient management, and public health surveillance. Nationally, standardized coding for drug-specific assays supports consistent clinical documentation, billing, and monitoring of substance use trends.
Key payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for PCP testing, typical sites of service (clinical and hospital laboratories), and the kinds of benchmarks and policy issues that commonly accompany laboratory toxicology codes—such as coverage criteria, place-of-service considerations, and coding accuracy. The publication also highlights common billing modifiers and notes where input data was not provided. Practical takeaways include how the code is used in care pathways and what payers typically consider when adjudicating laboratory toxicology claims.
Data not available in the input includes specific associated taxonomies, ICD-10 diagnosis mappings, detailed payer reimbursement rates, and related procedure codes.
Billing Code Overview
CPT code 83992 describes a laboratory assay that measures the level of the drug phencyclidine (PCP) in a biological specimen, most commonly urine or blood. The service involves analytical testing by a laboratory analyst to detect and quantify this potent recreational and illicit drug of abuse.
Service Type: Toxicology / Drug Testing Laboratory Service
Typical Site of Service: Clinical laboratory or hospital laboratory
Clinical & Coding Specifications
Clinical Context
A 24-year-old adult presents to the emergency department after being found confused and agitated by bystanders following a party. The emergency clinician orders toxicology screening because of suspected illicit drug intoxication and altered mental status. A urine specimen is collected and sent to the hospital laboratory for qualitative and/or quantitative drug testing. The lab analyst performs an assay for phencyclidine (PCP) levels using immunoassay screening and, if needed, confirmatory testing such as gas chromatography–mass spectrometry (GC-MS) or liquid chromatography–tandem mass spectrometry (LC-MS/MS) to measure PCP concentration. The measured level assists the clinical team in confirming exposure, assessing severity, and informing monitoring and disposition decisions. Typical workflow steps include specimen accessioning, specimen preparation, analytic measurement, result verification, and reporting to the ordering clinician. This testing is commonly ordered in emergency departments, inpatient hospitals, urgent care centers, and forensic or occupational settings when PCP exposure is suspected.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the physician/specialist interpretation portion of a lab test, if applicable to a split-billed toxicology service. |
TC |