Summary & Overview
CPT 0457U: PFAS 9 Panel, Blood Plasma/Serum by LC–MS/MS
CPT code 0457U designates a Proprietary Laboratory Analyses (PLA) test — the PFAS 9 Panel offered by Quest Diagnostics® — that measures nine perfluoroalkyl substances (PFAS) in blood plasma or serum using LC–MS/MS. This code matters nationally as PFAS exposure has public health implications and growing clinical interest, and proprietary PLA codes determine lab-specific billing and reporting pathways.
Key payers in the coverage landscape include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical purpose of the test, typical sites of service, and payer coverage themes. The publication summarizes national benchmarking context for proprietary laboratory testing, common modifier usage, and operational considerations for claims processing and billing workflows. It also highlights clinical context about PFAS testing methods and the unique nature of PLA coding that ties the code to a single manufacturer or laboratory.
The report does not present state-level policy detail; instead it provides national-level guidance on what CPT code 0457U represents, who the major payers are, and what billing and clinical topics to consider when managing claims for this PFAS panel.
Billing Code Overview
CPT code 0457U is a Proprietary Laboratory Analyses (PLA) code for the PFAS 9 Panel developed and reported by Quest Diagnostics®. This laboratory test quantifies nine perfluoroalkyl substances (PFAS) in a blood plasma or serum specimen using liquid chromatography with tandem mass spectrometry (LC–MS/MS). PFAS are man‑made chemicals found in various consumer and industrial products, and measurement can inform clinical and public health evaluation of exposure.
Service Type: Laboratory — Proprietary PFAS panel using LC–MS/MS
Typical Site of Service: Clinical laboratory or hospital outpatient laboratory
Data not available in the input for associated taxonomies, ICD‑10 diagnoses, related codes, and service line.
Clinical & Coding Specifications
Clinical Context
A patient with potential environmental exposure to per- and polyfluoroalkyl substances (PFAS) is evaluated in an outpatient occupational or environmental medicine clinic. The patient reports living near a firefighting training site and using nonstick cookware for many years, and presents with nonspecific symptoms such as fatigue, elevated cholesterol on prior labs, or concern about long-term cancer or reproductive risk. The ordering clinician documents exposure history and requests testing to quantify serum PFAS concentrations. A blood draw is collected (plasma or serum) during the clinic visit or at a phlebotomy site. The specimen is sent to Quest Diagnostics® for the proprietary PFAS 9 Panel analyzed by liquid chromatography–tandem mass spectrometry (LC–MS/MS). The laboratory performs analytic processing, interprets results vs. reference ranges, and issues a report to the ordering provider. Typical sites of service include outpatient clinics, occupational health centers, and commercial phlebotomy laboratories. Billing uses PLA code 0457U for the specific Quest Diagnostics® PFAS 9 Panel; professional interpretation by a clinician may be appended with appropriate evaluation and management or consultation codes when clinically indicated.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier applicable | Rarely used; default when no modifier applies to the laboratory PLA service |