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Test Code XJCV JC Virus, Molecular Detection, PCR, Spinal Fluid

Additional Codes



Reporting Name


Useful For

Aids in diagnosing progressive multifocal leukoencephalopathy due to JC virus (JCV)


This test is not to be used as a diagnostic tool for Creutzfeldt-Jakob disease (CJD).

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type


Specimen Required

Supplies: Aliquot Tube, 5 mL (T465)

Preferred: 12 x 75-mm screw cap vial (T465)

Acceptable: Sterile screw cap vial

Container/Tube: Sterile vial

Specimen Volume: 0.5 mL

Collection Instructions: Do not centrifuge.

Specimen Minimum Volume

0.3 mL

Specimen Stability Information

Specimen Type Temperature Time
CSF Refrigerated (preferred) 7 days
  Frozen  7 days

Reference Values


Day(s) and Time(s) Performed

Monday through Friday

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
LCJC JC Virus PCR, CSF In Process


Result ID Test Result Name Result LOINC Value
88909 JC Virus PCR, CSF 33295-7

Method Name

Real-Time Polymerase Chain Reaction (PCR)/DNA Probe Hybridization


If not ordering electronically, complete, print, and send a Microbiology Test Request Form (T244) with the specimen (