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Test Code HCVG Hepatitis C Virus Genotype, Serum

Additional Codes




Reporting Name

HCV Genotype, S

Useful For

Determining hepatitis C virus genotype (1 to 5) to guide antiviral therapy in patients with chronic hepatitis C 


Differentiating between hepatitis C virus subtypes 1a and 1b

Reflex Tests

Test ID Reporting Name Available Separately Always Performed
HCVGR HCV Genotype Resolution, S No No

Testing Algorithm

The following algorithms are available in Special Instructions:

-Hepatitis C: Testing Algorithm for Screening and Diagnosis

-Chronic Hepatitis C Treatment and Monitoring Algorithm: Interferon-Free Combination Therapy

Method Name

Reverse Transcriptase-Polymerase Chain Reaction (RT-PCR) Followed by Hybridization with Sequence-Specific, Fluorescent-Labeled Oligonucleotide Probes

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type

Serum SST

Shipping Instructions

Ship specimen frozen on dry ice only. If shipment will be delayed for more than 3 days, freeze serum at -20° C or colder (up to 42 days) until shipment on dry ice.

Specimen Required

Supplies: Aliquot Tube, 5 mL (T465)

Collection Container/Tube: Serum gel

Submission Container/Tube: Polypropylene vial (T465)

Specimen Volume: 5 mL

Collection Instructions:

1. Centrifuge blood collection tube per collection tube manufacturer's instructions.

2. Pour off serum into aliquot tube.

Additional Information: Specimens should contain a recommended minimum HCV viral load of 500 IU/mL.

Specimen Minimum Volume

1.5 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum SST Frozen (preferred) 42 days
  Refrigerated  72 hours

Reject Due To


Mild OK; Gross OK


Mild OK; Gross OK




Heparinized specimen, red-top tube, or plasma

Reference Values


Day(s) and Time(s) Performed

Monday through Friday; 7 a.m.-4 p.m.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
HCVG HCV Genotype, S 32286-7


Result ID Test Result Name Result LOINC Value
81618 HCV Genotype, S 32286-7

Test Classification

This test has been cleared or approved by the U.S. Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

Analytic Time

Monday through Thursday, 1 day; Friday, 3 days


If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:

General Request Form (T239) (

Gastroenterology and Hepatology Test Request Form (T728) (