Vitamin K1 : 36585

Test Code
VK1Q or 36585

Alias/See Also
Vitamin K

CPT Codes

Fasting for a minimum of 8 hours. Patient should refrain from eating liver and taking multivitamins or vitamin K at least 24 hours before sample collection.

Green (sodium heparin), green (lithium heparin), or EDTA lavender tube. Protect from light.

Transport Container
Protect from light. Centrifuge within 1 hour of collection and aliquot 3 mL (Min: 1.5 mL) plasma into an amber tube (preferred) or protect the transport tube with foil or place in an amber bag. Freeze immediately.

Transport Temperature

Specimen Stability
Ambient: Unacceptable; Refrigerated: Unacceptable; Frozen: 90 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis,grossly lipemic, serum


Setup Schedule
Tuesday - Saturday

Report Available
4-5 days (From receipt at performing laboratory)

Reference Range
Effective 9-23-2019
130-1500 pg/mL

Clinical Significance
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.

Performing Laboratory
Quest Diagnostics

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.