CPT code 84482 represents a laboratory assay measuring reverse T3 (rT3) in blood. Nationally, this code is used in endocrine and metabolic evaluations to assess peripheral thyroid hormone conversion and aid in complex thyroid disorder assessments. The test is performed in clinical and hospital laboratory settings and can inform diagnostic workups for patients with suspected abnormalities in thyroid hormone metabolism.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of where and how CPT code 84482 is applied clinically, typical sites of service, and the payer landscape relevant to coverage and billing considerations. The publication also presents benchmarks and coding guidance, outlines common modifiers used with laboratory services, and situates the test within clinical practice for endocrine evaluation.

This summary is intended for a national audience of billing professionals, laboratory managers, and clinicians seeking a clear reference on the clinical role and billing context for CPT code 84482. Data not available in the input is noted where applicable.