CPT® Code 87391

1. Indications

The procedure associated with CPT® Code 87391 is indicated for the detection of the HIV-2 antigen in individuals who may be at risk for HIV infection. The following conditions or situations warrant the use of this test:

• Risk of HIV-2 Infection Individuals who have engaged in high-risk behaviors, such as unprotected sexual intercourse with an HIV-positive partner or sharing needles, may require testing for HIV-2.
• Symptoms of HIV Infection Patients presenting with symptoms suggestive of HIV infection, such as unexplained weight loss, persistent fever, night sweats, or swollen lymph nodes, may be tested to confirm or rule out HIV-2.
• Pregnancy Pregnant women may be tested for HIV-2 to prevent mother-to-child transmission during childbirth or breastfeeding.
• Screening in High-Prevalence Areas Individuals living in or traveling to regions where HIV-2 is more prevalent may be screened as part of routine health assessments.

2. Procedure

The procedure for CPT® Code 87391 involves several key steps to ensure accurate detection of the HIV-2 antigen:

• Sample Collection A blood or saliva sample is collected from the patient. The sample must be handled carefully, either placed in a fixative or sent fresh to the laboratory for processing to maintain the integrity of the antigen.
• Preparation of the Sample In the laboratory, the sample is prepared for testing. This may involve centrifugation of blood samples to separate plasma or serum, depending on the specific immunoassay technique being used.
• Immunoassay Technique Application The prepared sample is subjected to one of the immunoassay techniques, such as EIA, ELISA, FIA, or IMCA. Each technique utilizes specific antibodies that bind to the HIV-2 antigen present in the sample.
• Detection and Measurement Following the binding of the antibodies to the antigen, a secondary enzyme-labeled antibody is added. This antibody reacts with the antigen-antibody complex, resulting in a chromogenic reaction that produces a visible color change or fluorescence. The intensity of the color or fluorescence is measured to determine the presence and quantity of the HIV-2 antigen.
• Result Interpretation The results are then interpreted as either qualitative, indicating the presence or absence of the HIV-2 antigen, or semi-quantitative, providing a measure of the antigen concentration based on the colorimetric reading.

3. Post-Procedure

After the procedure associated with CPT® Code 87391, the patient may receive counseling regarding the results of the test. If the test is positive, further confirmatory testing and medical evaluation are typically recommended to assess the patient's health status and determine the appropriate course of treatment. Patients may also be advised on preventive measures to reduce the risk of transmission. It is essential for healthcare providers to ensure that patients understand the implications of their test results and the importance of follow-up care. Additionally, patients should be informed about the potential for false positives or negatives and the need for retesting in certain circumstances.