Days Set Up
Monday - Friday
Analytic Time

16 - 21 days

Soft Order Code

Test Updated:


HIV Phenotype
Human Immunodeficiency Virus Type 1 Phenotype
PhenoSense HIV Drug Resistance Assay
HIV-1 PhenoSense GT

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Find a Requisition

All specimens should be accompanied by a requisition.

Submitting Specimens

Learn about how to properly label and where to ship specimens.

Order Kits and Supplies

MLabs provides all the supplies necessary for the collection of specimens.

Test FAQ

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Test Overview

Test Methodology

Polymerase Chain Reaction (PCR)

Test Usage

Review the level of susceptibility or resistance that a person has to each antiretroviral drug in order to design an individualized treatment plan. PhenoSense GT® also includes a measure of replication capacity (RC), sometimes called viral fitness, and HIV-1 subtype.

Reference Range

Interpretive report provided.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements

Collection Offsite

Collect specimens in sufficient lavender top tubes. Centrifuge within 2 hours of collection at 1000-1200 x g at room temperature for 10-15 minutes. Do not allow samples to remain in centrifuge after centrifugation. Remove plasma from cells immediately and transfer to a plastic screw cap tube. Freeze immediately.

Normal Volume
3 mL EDTA plasma
Minimum Volume
1.5 mL EDTA plasma

Billing Information

CPT Code
87900, 87901, 87903, 87904 x11
Pro Fee Code

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.