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Von Willebrand Activity (VWF Activity)

Tube Type = Light Blue Top

Tube Type

Test ID   LAB5337
EPIC Order   VONWILLEBRAND ACTIVITY
CPT Code(s)   85397
Group/Individual Test   Individual
Laboratory   Special Coagulation
Tube Station   30
Specimen Routine: 3.0 mL blood/light blue sodium citrate tube; See Comments
Stability
Unspun - 4 hrs
Room Temp - 4 hrs
Refrigerated - NO
Frozen - 6 months
Availability Routine: 2 run/week: Monday and Thursday
Turnaround Time   3-5 Business Days
Internal Reference Testing & Outreach Handling Instructions Platelet poor plasma (double spun). Aliquot and freeze within 4 hours.
Reference Range Normal: 50-200%
Comments Deliver Immediately

Reviewed by J. Carr on January 14, 2026

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514