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Test ID FFTRO Trofile DNA Co-Receptor Tropism Assay

Useful For

To determine the co-receptor tropism (CCR5, CXCR4, or dual/mixed) of a patient's HIV-1 strain for selection of CCR5 co-receptor antagonist therapy, when patient's HIV-1 viral load is <1,000 copies/mL.

Method Name

CD4 cell culture assay for phenotypic recombinant-virus co-receptor tropism.

Reporting Name

Trofile DNA Phenotypic Corecept Tro

Specimen Type

Whole Blood EDTA

Specimen Required

Draw 4 mL blood in a lavender-top (EDTA) tube(s), (Do not centrifuge.) Freeze and ship frozen.


Note: Trofile DNA is recommended for patients with undetectable viral loads.

Specimen Minimum Volume

3 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Whole Blood EDTA Frozen 14 days

Day(s) Performed

Monday through Friday

Performing Laboratory

Monogram Biosciences, Inc

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
FFTRO Trofile DNA Phenotypic Corecept Tro 53923-9


Result ID Test Result Name Result LOINC Value
Z2283 Tropotype Result 53923-9
Z2284 Interpretation: Not Provided

Report Available

14 to 20 days

NY State Approved