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Test Code KRASD Cell-free DNA KRAS 12, 13, 61,146, Blood

Advisory Information

This test is not a prenatal screening test. To evaluate for the presence of common fetal chromosome abnormalities using cell-free DNA, order NIPS / Cell-Free DNA Prenatal Screen.

Shipping Instructions

1. Samples should be transported at ambient temperature or refrigerated (4° C).

2. Samples are viable for 7 days in the Streck Black/Tan Top Tube Kit (T715).

Specimen Required

Supplies: Streck Black/Tan Top Tube Kit (T715)

Container/Tube: Streck Cell-Free DNA blood collection kit (T715)

Specimen Volume: Two 10-mL Streck Cell-Free DNA blood collection tubes

Additional Information: Only blood collected in Streck Cell-Free DNA BCT tubes will be accepted for analysis. Whole blood will be processed to produce platelet-poor plasma before cfDNA isolation.

Useful For

As an alternative to invasive tissue biopsies for the determination of KRAS 12, 13, 61,146 (G12A, G12C, G12D, G12R, G12S, G12V, G13D, Q61K, Q61L, Q61R, Q61H, and A146T) mutation status


Selection of patients with colorectal cancer who are most likely to benefit from epidermal growth factor receptor (EGFR)-targeted therapies

Method Name

Digital Droplet Polymerase Chain Reaction (PCR)

Reporting Name

cfDNA KRAS 12, 13, 61, 146 Blood

Specimen Type

Whole blood

Specimen Minimum Volume

One 10 mL Streck tube

Specimen Stability Information

Specimen Type Temperature Time
Whole blood Ambient (preferred) 7 days
  Refrigerated  7 days

Reject Due To

No specimen collected in the Streck Cell-Free DNA blood collection tubes will be rejected.

Day(s) and Time(s) Performed

 Monday through Friday; Varies

Analytic Time

5 days

Performing Laboratory

Mayo Medical Laboratories in Rochester

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
KRASD cfDNA KRAS 12, 13, 61, 146 Blood In Process


Result ID Test Result Name Result LOINC Value
113123 Result Summary In Process
113508 Result In Process
113125 Interpretation In Process
113126 Additional Information In Process
113127 Specimen In Process
113128 Source In Process
113129 Released By In Process