Ordering Recommendation

Use for nutritional assessment of vitamin K1.

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation

Patient should fast overnight for 12 hours and should not consume alcohol for 24 hours prior to blood draw.


Plain red or serum separator tube. Also acceptable: Lavender (EDTA) or pink (K2EDTA).

Specimen Preparation

Protect from light during collection, storage, and shipment. Separate serum or plasma from cells within 1 hour of collection. Transfer 1 mL serum or plasma to an ARUP Amber Transport Tube. (Min: 0.6 mL)

Storage/Transport Temperature

Frozen. Separate specimens must be submitted when multiple tests are ordered.

Unacceptable Conditions

Any specimen other than serum or EDTA plasma. Hemolyzed specimens.


After separation from cells: Ambient: Unacceptable; Refrigerated: 1 month; Frozen: 6 months


Quantitative High Performance Liquid Chromatography (HPLC)




2-5 days

Reference Interval

0.22-4.88 nmol/L

Interpretive Data

Vitamin K concentration is reported as nanomoles per liter (nmol/L). To convert concentration to nanograms per milliliter (ng/mL), multiply the result by 0.45.

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

Laboratory Developed Test (LDT)


Hotline History


CPT Codes



Component Test Code* Component Chart Name LOINC
0099225 Vitamin K1 9622-2
* 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.


  • K1, Vitamin
  • Phylloquinone
  • phytonadione
Vitamin K1, Serum