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CPT 84402: Free Testosterone Assay in Serum
CPT code 84402 denotes a laboratory assay measuring free testosterone in patient serum. Free testosterone testing plays a role in diagnosing and managing endocrine and reproductive conditions by assessing the biologically active fraction of testosterone. As a routinely ordered endocrine laboratory test, it influences clinical decision-making for conditions such as hypogonadism and polycystic ovarian syndrome and is commonly processed through clinical laboratory services across outpatient settings.
This analysis covers major national payers including Aetna, Blue Cross Blue Shield, Cigna Health, United Healthcare, and Medicare. Readers will find a concise overview of the clinical purpose of the test, payer coverage considerations, common diagnostic contexts, and related laboratory codes used in the same service lines. The content highlights where 84402 fits within laboratory testing workflows and how it relates to common panels and separate testosterone assays.
The publication provides practical reference material for billing and coding teams, lab managers, and clinician offices, summarizing the code description, typical site of service, related laboratory procedures, and the primary clinical indications that commonly accompany the test order. Data not available in the input is noted where applicable.
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Billing Code Overview
CPT code 84402 describes a laboratory assay in which a lab analyst measures free testosterone, typically performed on patient serum. This service is a clinical laboratory test used to quantify the unbound fraction of testosterone, providing information distinct from total testosterone measurements.
Service type: Clinical laboratory diagnostic testing
Typical site of service: Clinical laboratory or outpatient phlebotomy collection site
National Reimbursement Benchmarks
Commercial reimbursement for CPT 84402 centers around an average commercial (BUCA) rate of $51.80, with individual payers showing meaningful variation around that benchmark. Blue Cross Blue Shield presents the highest dispersion and highest endpoints among payers, while Aetna and Cigna sit nearer the BUCA mean on average; UnitedHealth Group’s central tendency is below BUCA. These differences indicate that network and contract structures produce distinct commercial positioning for this code across major carriers.
Examining dispersion (P75 minus P25) quantifies variability: Blue Cross Blue Shield’s interquartile spread is $29.10 (from $57.40 to $85.50), the widest among listed payers, signaling broader negotiated outcomes. UnitedHealth Group has the tightest spread at $14.30 (from $11.20 to $25.50), with Aetna ($12.00) and Cigna ($24.40) intermediate; BUCA interquartile spread is $23.00 (from $38.80 to $61.80).