Vitamin K
Order Code:
VITK
Test Summary
Vitamin K is a required co-factor for the synthesis of factors 2, 7, 9, and 10 and proteins C and S. Deficiencies of vitamin K lead to bleeding. Coumadin® (warfarin) acts as an anticoagulant because it is a vitamin K antagonist.
Aliases
- N/A
Specimen Collection
Special Instructions
N/A
Preferred Specimen
1 mL plasma collected in an EDTA (lavender-top) tube - protect from light
Minimum Volume
0.5 mL
Instructions
See Vitamin Collection Link
Patient Preparation
Fasting for a minimum of 8 hours required. Patient should refrain from eating liver and taking multivitamins or vitamin K at least 24 hours before sample collection.
Storage
Amber transport tube, light protected
Transport Temperature
Frozen
Specimen Stability
- Room temperature: 24 hours
- Refrigerated: 24 hours
- Frozen: 90 days
Limitations
N/A
Other Acceptable Specimens
Frozen serum - protect from light.
Frozen plasma collected in a sodium or lithium heparin (green-top) tube - protect from light.
Frozen plasma collected in a sodium or lithium heparin (green-top) tube - protect from light.
Unacceptable Specimens
Grossly lipemic • Gross hemolysis
Order Code
VITK
EPIC (Premier) Code
LAB3861
Includes
N/A
CPT Code
- 84597
Billing Code
- 670914
CPT Statement
Methodology
Chromatography/Mass Spectrometry
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. The FDA has determined that such clearance or approval is not necessary. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Physician Attestation of Informed Consent
N/A
Testing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly VA, 20153
14225 Newbrook Drive
Chantilly VA, 20153
Department
Reference Testing
Reference Range
130-1500 pg/mL
Setup Schedule / Expected Turnaround Time
Monday - Thursday, Saturday; Report available: 3 - 4 days
Resources
Specimen Collection
Special Instructions
N/A
Preferred Specimen
1 mL plasma collected in an EDTA (lavender-top) tube - protect from light
Minimum Volume
0.5 mL
Instructions
See Vitamin Collection Link
Patient Preparation
Fasting for a minimum of 8 hours required. Patient should refrain from eating liver and taking multivitamins or vitamin K at least 24 hours before sample collection.
Storage
Amber transport tube, light protected
Transport Temperature
Frozen
Specimen Stability
- Room temperature: 24 hours
- Refrigerated: 24 hours
- Frozen: 90 days
Limitations
N/A
Other Acceptable Specimens
Frozen serum - protect from light.
Frozen plasma collected in a sodium or lithium heparin (green-top) tube - protect from light.
Frozen plasma collected in a sodium or lithium heparin (green-top) tube - protect from light.
Unacceptable Specimens
Grossly lipemic • Gross hemolysis
Result Information
Methodology
Chromatography/Mass Spectrometry
Testing Laboratory
N/A
Reference Range
130-1500 pg/mL
Setup Schedule / Expected Turnaround Time
Monday - Thursday, Saturday; Report available: 3 - 4 days