Ordering Recommendation

Detect and quantify BK virus in blood or urine.




Quantitative Real-Time Polymerase Chain Reaction




1-3 days

New York DOH Approval Status

This test is New York DOH approved.

Specimen Required

Patient Preparation

Lavender (EDTA), pink (K2EDTA) or serum separator tube OR urine.

Specimen Preparation

Transport 1 mL whole blood, serum, plasma or urine in a sterile container. (Min: 0.5 mL).

Storage/Transport Temperature


Unacceptable Conditions

Heparinized specimens.


Specimen source required.


Ambient: 24 hours; Refrigerated: 72 hours; Frozen: 1 month

Reference Interval

Not detected

Interpretive Data

The quantitative range of this assay is 2.6-8.6 log copies/mL (390-390,000,000 copies/mL).

A negative result (less than 2.6 log copies/mL or less than 390 copies/mL) does not rule out the presence of PCR inhibitors in the patient specimen or BK virus DNA concentrations below the level of detection of the assay.  Inhibition may also lead to underestimation of viral quantitation.

Caution should be taken when interpreting results generated by different assay methodologies.

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

Analyte Specific Reagent (ASR)


The limit of quantification for this DNA assay is 2.6 log copies/mL (390 copies/mL). If the assay DID NOT DETECT the virus, the test result will be reported as "< 2.6 log copies/mL (< 390 copies/mL)." If the assay DETECTED the presence of the virus but was not able to accurately quantify the number of copies, the test result will be reported as "Not Quantified."

Hotline History


CPT Codes



Component Test Code* Component Chart Name LOINC
0090059 BK Virus Quant by PCR (log copy/mL) 43201-3
0093241 BK Virus Quant by PCR, Interp 47251-4
0096366 BK Virus Quant by PCR, Source 31208-2
2002302 BK Virus Quant by PCR (copy/mL) 48309-9
* 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.


  • BK (Polyoma) Virus
  • BK Virus Quant PCR
  • BK Virus, Molecular Detection
  • Viral load monitoring
BK Virus, Quantitative PCR (Change effective as of 02/21/23: Refer to 3006075, 3006076 in the February Hotline)