HIV-1/2 Antigen and Antibodies, Fourth Generation, with Reflexes

HIV-1/2 Antigen and Antibodies, Fourth Generation, with Reflexes

Test Code

91431
87389
CPT Code is subject to a Medicare Limited Coverage Policy and may require a signed ABN when ordering.
91431
87389
CPT Code is subject to a Medicare Limited Coverage Policy and may require a signed ABN when ordering.
In-home collection may be available in your area for purchase through Quest Mobile.

Test Details

Methodology

Immunoassay (IA)

Alternative Name(s)

Fourth Generation HIV,4th Generation HIV

LOINC® Codes, Performing Laboratory

Methodology

Immunoassay (IA)

Alternative Name(s)

Fourth Generation HIV,4th Generation HIV

Preferred Specimen(s)

3 mL serum

Alternative Specimen(s)

Serum collected in: Red-top tube (no gel) • Plasma collected in: EDTA (lavender-top) tube

Minimum Volume

2 mL

Collection Instructions

⁠⁠⁠⁠⁠⁠⁠Serum: Collect in a serum separator tube or red-top tube (no gel). The tube should be centrifuged after clotting. Spun serum separator tubes may be submitted at room temperature or refrigerated unopened without transfer to a plastic screw-cap vial. Red-top tube (no gel) serum should be transferred to a plastic screw-cap vial and submitted for testing.

Plasma: Collect in an EDTA (lavender-top) tube and centrifuge tube within 24 hours of collection. Transfer plasma to a plastic screw-cap vial, label as plasma, and submit for testing.

Submitted tubes must be labeled with patient identifier and submitted only for HIV testing.

Transport Container

Serum separator tube (SST)
Submitted tubes must be labeled with patient identifier and submitted only for HIV testing.

Transport Temperature

Room temperature

Specimen Stability

  • Room temperature: 72 hours
  • Refrigerated: 5 days
  • Frozen: 30 days

Reject Criteria

Gross hemolysis • Frozen serum separator tube (SST)

Setup Schedule

3 mL serum
Serum collected in: Red-top tube (no gel) • Plasma collected in: EDTA (lavender-top) tube
2 mL
⁠⁠⁠⁠⁠⁠⁠Serum: Collect in a serum separator tube or red-top tube (no gel). The tube should be centrifuged after clotting. Spun serum separator tubes may be submitted at room temperature or refrigerated unopened without transfer to a plastic screw-cap vial. Red-top tube (no gel) serum should be transferred to a plastic screw-cap vial and submitted for testing.

Plasma: Collect in an EDTA (lavender-top) tube and centrifuge tube within 24 hours of collection. Transfer plasma to a plastic screw-cap vial, label as plasma, and submit for testing.

Submitted tubes must be labeled with patient identifier and submitted only for HIV testing.
Serum separator tube (SST)
Submitted tubes must be labeled with patient identifier and submitted only for HIV testing.
Room temperature
Room temperature: 72 hours
Refrigerated: 5 days
Frozen: 30 days
Gross hemolysis • Frozen serum separator tube (SST)
In-home collection may be available in your area for purchase through Quest Mobile.
Test Details

Clinical Significance

Test Resources

Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

The CPT codes provided are based on AMA guidance and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

This material contains content from LOINC® (http://loinc.org). The LOINC Table, LOINC Table Core are copyright © 1995-2019, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license.

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