Summary & Overview
CPT 82725: Nonesterified Fatty Acids, Serum Quantitative
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.
Billing Code Overview
CPT code 82725 measures nonesterified fatty acids in serum. The test quantifies free (nonesterified) fatty acids, which typically represent less than 5 percent of total serum fatty acids and are protein bound. This analysis is a specialized clinical laboratory service used to assess metabolic and lipid-related conditions.
Service Type: Clinical laboratory test — quantitative serum assay
Typical Site of Service: Clinical laboratory or hospital laboratory; outpatient phlebotomy sites
Clinical & Coding Specifications
Clinical Context
A 54-year-old outpatient with poorly controlled type 2 diabetes and recent unexplained weight loss presents for metabolic evaluation. The clinician orders a serum nonesterified (free) fatty acids test to assess lipolysis and fatty acid mobilization as part of an endocrine/metabolic panel. The patient is scheduled for a morning venipuncture after an overnight fast. A phlebotomist collects a serum specimen, labels it, and sends it to the clinical chemistry laboratory. The laboratory analyst performs the measurement of nonesterified fatty acids (82725) using an appropriate validated assay. Results are verified by the laboratory supervisor and reported in the electronic medical record for the ordering endocrinologist to interpret alongside glucose, insulin, lipid panel, and liver function tests. Typical clinical uses include evaluation of metabolic stress, suspected endocrine disorders, assessment during evaluation of unexplained hyperlipidemia or lipodystrophy, and monitoring of metabolic response during inpatient or outpatient care.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the laboratory professional interpretation component, if applicable under separate reporting rules. |