CPT code 82725 represents a laboratory assay that measures nonesterified (free) fatty acids in serum. This specialized quantitative test reports the fraction of fatty acids that are not esterified and are typically protein bound. As a targeted metabolic marker, the assay supports clinical evaluation of lipid metabolism, nutritional status, and certain endocrine or metabolic disorders. Nationally, accurate reporting of this code matters for laboratory billing consistency, claims adjudication, and clinical interpretation of lipid panels.

Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the code’s clinical purpose, typical sites of service, and the payer mix relevant to national coverage and billing patterns. The publication summarizes common modifiers in use, notes where input data are not provided, and outlines the clinical context in which 82725 is applied.

The report is designed to help laboratory administrators, coders, revenue cycle staff, and clinicians understand where 82725 fits within laboratory testing portfolios, what to expect from payer interaction at a national level, and which operational and documentation elements are commonly associated with this assay. Data not available in the input are explicitly identified in relevant sections of the full publication.