Vitamin K [36585X]

Test Code

CPT Codes

Preferred Specimen
3 mL plasma collected in an EDTA (lavender-top) tube

Minimum Volume
1.5 mL

Other Acceptable Specimens
Plasma collected in: Lithium heparin (green-top) tube

Separate and freeze immediately in plastic screw-cap vial. Wrap sample in foil before sending to lab. No disclaimer is required.

Note: Samples received frozen but not protected from light are acceptable. Samples received refrigerated but not protected from light are unaccpetable and should be rejected.

Transport Container
Plastic screw-cap vial protected from light

Transport Temperature

Specimen Stability
Room temperature: Unacceptable

Refrigerated: Unacceptable

Frozen: 90 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Received room temperature • Received refrigerated • Serum

High Performance Liquid Chromatography (HPLC)

Setup Schedule
Set up: Tues a.m.; Report available: 2 days

Reference Range
80-1160 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 Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153

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.