Ordering Recommendation

Order before initiating treatment with NS5A inhibitors. Do not order prior to molecular confirmation of positive hepatitis C virus (HCV) screen and confirmation of genotype 1a or 1b.

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation

Lavender (EDTA), Pink (K2EDTA), Plasma Preparation Tube (PPT), or Serum Separator Tube (SST).

Specimen Preparation

Separate from cells ASAP or within 2 hours of collection. Transfer 2 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 1 mL)

Storage/Transport Temperature


Unacceptable Conditions

Heparinized specimens.


Ambient: Unacceptable; Refrigerated: 72 hours; Frozen: 4 months


Polymerase Chain Reaction/Sequencing




10-13 days

Reference Interval

By Report

Interpretive Data

This assay detects resistance-associated variants in NS5A codons 20-101 for HCV genotypes 1a and 1b. Variants in viral sub-populations below 20 percent of total may not be detected. For further information, please refer to drug package inserts for the applicable direct-acting antiviral drug and current HCV treatment guidelines (eg., AASLD/IDSA guidelines or EASL HCV treatment recommendations).

This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.

Compliance Category

Laboratory Developed Test (LDT)


This test may be unsuccessful if the HCV RNA viral load is less than log 3.4 or 2500 IU/mL and/or if the HCV RNA genotype is not 1a or 1b.

Hotline History


CPT Codes



Component Test Code* Component Chart Name LOINC
2014140 NS5A Genotype 82512-5
2014141 NS5A Resistance 82380-7
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.


Hepatitis C Virus (HCV) NS5A Drug Resistance by Sequencing