CPT code 87420 describes a laboratory immunoassay performed by a lab analyst to detect respiratory syncytial virus (RSV) antigens; the service is a diagnostic antigen test typically performed in a clinical laboratory or hospital outpatient lab using techniques such as enzyme immunoassay (EIA).

For related coverage guidance, see recent payer policy updates: B-Hemolytic Streptococcus Testing, Human Immunodeficiency Virus (HIV) — Coverage Criteria for Testing and Resistance Assays, Hepatitis Testing (A, B, C, D) Coverage Criteria.