CPT code 82642 designates a laboratory assay for measuring serum dihydrotestosterone (DHT), an androgen produced by conversion of testosterone via 5-alpha reductase. This test is used in clinical evaluation of androgen status and can inform diagnosis and management of conditions such as androgenic alopecia, hirsutism, ambiguous genitalia, and certain endocrine disorders. As a specialized hormone assay, it is performed in certified clinical or hospital laboratories and factors into national discussions around laboratory coverage, appropriate utilization, and diagnostic pathways.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for ordering the test, typical site-of-service considerations, common modifiers, and guidance on what information is available versus missing. The publication presents national benchmarks and payer coverage patterns where available, summarizes relevant policy and billing considerations, and outlines how this code fits into broader endocrine and laboratory service lines. Data gaps are noted explicitly as "Data not available in the input."