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CPT 84145: Procalcitonin (PCT) Level Assay
CPT code 84145 reports a laboratory assay to quantify procalcitonin (PCT) in a patient specimen, typically serum. Procalcitonin measurement has national clinical relevance as a biomarker used to support evaluation of systemic bacterial infection and sepsis, inform clinical decision-making, and guide antimicrobial stewardship programs. The code is billed for laboratory services performed in clinical and hospital laboratories and is relevant across inpatient, emergency department, and outpatient settings. Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise outline of what CPT code 84145 represents, the typical sites of service, common billing modifiers and service-line context when available, and where to locate related documentation. The publication provides national benchmarks and payer coverage context where available, summarizes relevant clinical indications for the test, and flags policy or coding updates affecting laboratory reporting. Data not available in the input is noted where applicable.
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Billing Code Overview
CPT code 84145 describes a laboratory assay performed by a lab analyst to measure procalcitonin (PCT) levels in a patient specimen, commonly serum. The test is used to evaluate circulating levels of procalcitonin, a biomarker that can assist clinicians in the assessment of systemic bacterial infection and sepsis risk.
Service Type
- Laboratory test
Typical Site of Service
- Clinical laboratory or hospital laboratory; specimens are usually collected in an outpatient clinic, emergency department, or inpatient setting and sent to a certified clinical laboratory for analysis.