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CPT 82542: Column Chromatography with Mass Spectrometry Lab Test
CPT code 82542 defines a technical laboratory procedure using column chromatography, with mass spectrometry as needed, to detect or quantify a nondrug analyte in a patient specimen. This code captures the technical component of an analytical laboratory assay performed by trained laboratory personnel and is relevant to hospital and standalone clinical laboratories nationwide. Its proper use affects claims processing, laboratory reimbursement, and the capture of diagnostic testing services in clinical workflows.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical purpose of the test, standard sites of service, and the administrative context for billing CPT code 82542. The publication explains common billing considerations, typical documentation elements required to support the technical laboratory service, and how the code fits into lab service line reporting. It also outlines where to find additional policy and coverage information from major payers and provides benchmarking and policy update summaries when available.
This national-level summary is intended to orient laboratory managers, billers, and compliance staff to the clinical and billing identity of CPT code 82542 and to direct readers to payer policies and coding resources for detailed reimbursement and coverage guidance.
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Billing Code Overview
CPT code 82542 describes a laboratory procedure in which a lab analyst performs the technical testing to evaluate a specimen for the presence or amount of a nondrug analyte using column chromatography, with mass spectrometry techniques used as needed. This service is a clinical laboratory test performed by trained laboratory personnel to detect or quantify specific analytes in patient specimens.
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Service type: Clinical laboratory diagnostic testing using column chromatography, often with mass spectrometry confirmation
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Typical site of service: Clinical laboratory or hospital laboratory setting where analytical instrumentation and trained technical staff are available
National Reimbursement Benchmarks
National commercial reimbursement for CPT 82542 centers around BUCA’s mean of $40.8 as an average-commercial benchmark, with Blue Cross Blue Shield showing the highest mean ($55.8) and Aetna, Cigna, and UnitedHealth Group clustered lower in the $19–$23 range. Blue Cross Blue Shield’s distribution also reaches the highest observed maximum ($158.5), while Aetna and UnitedHealth Group report lower observed minima ($3.6 and $10.0, respectively), reflecting a wide top-end spread for some payers but a mid-market anchored near BUCA’s average.
Dispersion measured by the interquartile range (P75–P25) is widest for Blue Cross Blue Shield at $32.1 (P75 $66.5 minus P25 $43.4) and narrowest for UnitedHealth Group at $13.0 (P75 $24.1 minus P25 $10.1). Cigna’s IQR is $18.6, Aetna’s is $9.0, and BUCA’s IQR is $19.0; these comparisons indicate that Blue Cross Blue Shield exhibits the greatest variability in commercial rates while UnitedHealth Group is the tightest.