Test Overview
Test Methodology

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Reference Range *

0.10 - 2.20 ng/mL
<18 years: Not established

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Limitations

Testing of non-fasting specimens or use of vitamin K1 supplementation can result in elevated serum vitamin K1 concentrations.

Test Details
Days Set Up
Monday - Friday
Analytic Time

2 - 5 days

Soft Order Code
VITK
MiChart Code
Vitamin K (Sendout)
Synonyms
    Laboratory
    Sendout Testing
    Reference Laboratory
    Mayo VITK1
    Section
    Sendout Testing
    Specimen Requirements
    Collection

    Fasting: 12 hours, required; Infants should have specimen collected before next feeding. 

    Collect specimen in a red top or SST tube. Specimen must be spun within 2 hours of collection: For red top tubes: 

    Preferred: Immediately aliquot serum into an amber or light-protected plastic vial.

    Acceptable: Serum may be on whole blood cells a maximum of 2 hours before aliquoting. Protect the collection tube from light.

    For SST tubes: 

    Preferred: Immediately aliquot serum into an amber or light-protected plastic vial.

    Acceptable: Serum may be aliquoted into an amber or light-protected plastic vial within 24 hours of collection when kept at ambient temperature and protected from light or within 7 days of collection if kept refrigerated and protected from light.

    Collection Instructions

    Fasting: 12 hours, required; Infants should have specimen collected before next feeding.

    Collect specimen in a red top or SST tube. Specimen must be spun within 2 hours of collection: For red top tubes: 

    Preferred: Immediately aliquot serum into an amber or light-protected plastic vial.

    Acceptable: Serum may be on whole blood cells a maximum of 2 hours before aliquoting. Protect the collection tube from light.

    For SST tubes: 

    Preferred: Immediately aliquot serum into an amber or light-protected plastic vial.

    Acceptable: Serum may be aliquoted into an amber or light-protected plastic vial within 24 hours of collection when kept at ambient temperature and protected from light or within 7 days of collection if kept refrigerated and protected from light.

    Special Handling

    Fasting: 12 hours, required; Infants should have specimen collected before next feeding

    Normal Volume

    2 mL serum

    Minimum Volume

    0.75 mL serum

    Storage Temperature
    Refrigerated
    Rejection Criteria
    Gross hemolysis, lipemia or gross icterus
    Additional Information

    Test sent to Mayo Medical Laboratories.

    Billing
    CPT Code
    84597
    Fee Code
    37992
    NY State Approved
    No