CPT code 82978 represents a specialized laboratory assay for measuring glutathione levels, usually from a whole blood specimen. Glutathione, a key intracellular antioxidant tripeptide, is clinically relevant because reduced levels are associated with liver and kidney diseases and other conditions involving oxidative stress. Nationally, this code matters for clinicians monitoring metabolic and hepatic/renal dysfunction and for laboratories that perform targeted biochemical testing.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication outlines coverage and billing considerations across major commercial and public payers (Aetna, BCBS, Cigna, UHC, Medicare) to provide a comparative view for providers and laboratory administrators.

Readers will learn the clinical context for ordering the assay, typical sites of service, and what to expect in terms of billing classification and common modifiers. The report also summarizes benchmarks and policy updates where available and highlights practical coding considerations for laboratories that perform specialized biochemical testing. Data not available in the input is clearly identified in relevant sections.