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.

Test Limitations

Results of viral load must be greater than or equal to 500 copies/mL.

Test Details
Days Set Up
Monday - Friday
Analytic Time

16 - 21 days

Soft Order Code
  • HIV Phenotype
  • Human Immunodeficiency Virus Type 1 Phenotype
  • PhenoSense HIV Drug Resistance Assay
  • HIV-1 PhenoSense GT
  • Phenosense GT
Reference Laboratory
Mayo FPGT (91757) (Monogram)
Special Testing
Specimen Requirements
Collection Instructions

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.

Special Handling

Specimen must be spun, aliquoted and frozen with 2 hours of collection.

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

Test sent to Mayo Medical Laboratories; performed by Monogram Biosciences.

CPT Code
87900, 87901, 87903, 87904 x11
NY State Approved