Skip Ribbon Commands
Skip to main content
Sign In

24818 Vitamin K1, Serum (VITK1)

Vitamin K1, Serum (VITK1)
Test Code: VK1SO
Synonyms/Keywords
Phylloquinone, Phytonadione, Mephyton, Phytomenadione, Synthex, Konakion
Useful For
Assessment of circulating vitamin K1 concentration
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)
Pediatric Minimum Volume
(no repeat)

Yes (12-14 hours)​

​Serum ​Red Top Tube (RTT) Serum Separator Tube (SST) 2 mL​ ​0.75 mL
Collection Processing Instructions

Fasting-overnight (12-14 hours) (infants-draw prior to next feeding).

Serum: Draw blood in a plain, red-top tube(s). Spin down and send 2 mL of serum in amber vial to protect from light.

Note: 1. Protect from light within 1 hour of collection.
         2. Patient must be fasting overnight (12 -14  hours).
Specimen Stability Information
Specimen Type Temperature Time
​Serum ​ ​Refrigerate (preferred) ​30 days
​Ambient ​30 days
​Frozen ​30 days
Rejection Criteria
​Lipemia Gross
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Mayo Clinic Laboratories​ Monday through Friday​ ​2 days
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Reference Lab
Reference Range Information
> or =18 years: 0.10-2.20 ng/mL
<18 years: not established
Interpretation
Low vitamin K1 concentrations in the serum are indicative of insufficiency and poor vitamin K1 status.
Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
​84597
Synonyms/Keywords
Phylloquinone, Phytonadione, Mephyton, Phytomenadione, Synthex, Konakion
Ordering Applications
Ordering Application Description
​Centricity ​Vit. K1 (VITK1)
​Cerner ​Vitamin K1 (91226)
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)
Pediatric Minimum Volume
(no repeat)

Yes (12-14 hours)​

​Serum ​Red Top Tube (RTT) Serum Separator Tube (SST) 2 mL​ ​0.75 mL
Collection Processing

Fasting-overnight (12-14 hours) (infants-draw prior to next feeding).

Serum: Draw blood in a plain, red-top tube(s). Spin down and send 2 mL of serum in amber vial to protect from light.

Note: 1. Protect from light within 1 hour of collection.
         2. Patient must be fasting overnight (12 -14  hours).
Specimen Stability Information
Specimen Type Temperature Time
​Serum ​ ​Refrigerate (preferred) ​30 days
​Ambient ​30 days
​Frozen ​30 days
Rejection Criteria
​Lipemia Gross
Useful For
Assessment of circulating vitamin K1 concentration
Reference Range Information
> or =18 years: 0.10-2.20 ng/mL
<18 years: not established
Interpretation
Low vitamin K1 concentrations in the serum are indicative of insufficiency and poor vitamin K1 status.
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Mayo Clinic Laboratories​ Monday through Friday​ ​2 days
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Reference Lab
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
​84597
For most current information refer to the Marshfield Laboratory online reference manual.