Ordering Recommendation

Use to detect and quantify BK virus in urine. For additional information regarding this test, please visit BK Virus by Quantitative NAAT.

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation


Specimen Preparation

Immediately transfer urine to a cobas® PCR urine sample tube (ARUP supply #58056 PK/100 or #58084 PK/10) available online through eSupply using ARUP Connect or contact Client Services at 800-522-2787. Liquid level must be between the black fill lines on the tube.

Storage/Transport Temperature


Unacceptable Conditions

Under- or over-filled tubes. Specimens in any transport media other than indicated above. Neat urine. Plasma (refer to BK Virus by Quantitative NAAT, Plasma, ARUP test code 3006076).


Urine in media: Ambient: 90 days; Refrigerated: 90 days; Frozen: Unacceptable.


Quantitative Polymerase Chain Reaction




1-3 days

Reference Interval

Not detected

Interpretive Data

The quantitative range of this assay is 2.30-8.00 log IU/mL (200-100,000,000 IU/mL).

An interpretation of "Not Detected" does not rule out the presence of inhibitors or BKV DNA concentration below the level of detection of the assay. Care should be taken in the interpretation of any single viral load determination.

International standardization has improved comparability of assay results across laboratories, but discrepancies still exist due to commutability issues with the standard.

Compliance Category



The limit of quantification for this assay is 2.30 log IU/mL (200 IU/mL). If the assay DETECTED the presence of the virus but was not able to accurately quantify the viral load, the test result will be reported as "Not Quantified, Detected".

Hotline History


CPT Codes



Component Test Code* Component Chart Name LOINC
3006087 BK Qnt by NAAT, Urine IU/mL 32285-9
3006088 BK Qnt by NAAT, Urine log IU/mL 90924-2
3006089 BK Qnt by NAAT, Urine Interp 33978-8
* 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
  • BK (Polyoma) Virus
  • BK Virus
  • BKV
  • Molecular Detection
  • transplant
  • Viral load monitoring
BK Virus by Quantitative NAAT, Urine