CPT code 87804 is a procedure that tests a patient’s sample for influenza virus antigens using an immunoassay method and visually observing the results.
What Is CPT Code 87804?
CPT 87804 describes a medical procedure in which a patient’s specimen is tested for influenza virus antigens using an immunoassay method.
This procedure involves extracting viral particles from the patient’s sample, incubating the extraction, and adding them to a test device containing antibodies specific to the influenza virus.
If the test is positive, a visual indication, such as a colored line, will appear, indicating the presence of flu antigens. The analyst directly observes this reaction and records the results.
The CPT book describes CPT code 87804 as: “Infectious agent antigen detection by immunoassay with direct optical (i.e., visual) observation; Influenza.”
The analyst performs the technical steps to test the patient’s specimen for antigens to influenza virus using an immunoassay method, such as a chromatographic assay, that may include extracting viral particles from the swab or washings, incubating the extraction phase, and adding the extracted liquid to a test device containing antibodies to influenza virus.
A color change, such as a colored line, appears within several minutes, indicating the presence of flu antigens, and the analyst directly observes the reaction.
How To Use CPT 87804
CPT code 87804 is a CLIA-Waived test.