Test Code VITK1 Vitamin K1, Serum
Additional Codes
| Epic Ordering Code | LAB3041959 |
| NBS code | LBC11819 |
| Service code | 37151 |
Reporting Name
Vitamin K1, SSpecimen Type
SerumShipping Instructions
Ship specimen in amber vial or wrapped to protect from light.
Specimen Required
Patient Preparation:
Fasting: 12 hours, required; Infants should have specimen collected before next feeding
Supplies: Amber Frosted Tube, 5 mL (T915)
Collection Container/Tube:
Preferred: Red top
Acceptable: Serum gel
Submission Container/Tube: Amber vial
Specimen Volume: 2 mL Serum
Collection Instructions:
1. Within 2 hours of collection, centrifuge the specimen.
2. 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.
3. For serum-gel 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.
NUH Outreach Laboratories:
Specimen Requirements
Submit only one of the following:
Preferred: Red Top
Acceptable: Yellow Top
Fasting: 12 hours, required; Infants should have specimen collected before next feeding
Processing Requirements
Centrifuge and aliquot serum into a Mayo amber tube within 2 hours of collection. Protect from light.
Specimen type: Serum
Volume: 2 mL
Storage/transport requirements: Refrigerated
Forms
If not ordering electronically, complete, print, and send a General Request (T239) with the specimen.
Specimen Minimum Volume
Serum: 0.75 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum | Refrigerated (preferred) | 14 days |
| Frozen | 30 days | |
| Ambient | 24 hours |
Reject Due To
| Gross hemolysis | OK |
| Lipemia | Reject |
| Gross icterus | OK |
Method Name
Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)
Day(s) Performed
Monday through Friday
Report Available
2 to 5 daysPlease note that this is a referral test requiring transport to the external testing facility and an additional 3-5 days is required.
Reference Values
<18 years: Not established
≥18 years: 0.10-2.20 ng/mL
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Useful For
Assessment of circulating Vitamin K1 concentration
CPT Code Information
84597
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| VITK1 | Vitamin K1, S | 9622-2 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 62167 | Vitamin K1, S | 9622-2 |
Secondary ID
42364Test Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.Last updated 18/08/2026