Geisinger Medical Laboratories/Geisinger Proven Diagnostics Test Catalog

Order Display Name: Geisinger Epic Procedure Code Or ID CPT Code:  

VON WILLEBRAND DISEASE TYPE 2N (VWF: FACTOR VIII)

ORDERING INFORMATION:
Geisinger Epic Procedure Code: LAB1304         Geisinger Epic ID: 53141

SPECIMEN COLLECTION
Specimen type:
Plasma
Preferred collection container:
Specimen required:
1 mL platelet-poor plasma; minimum 0.5 mL
Patient preparation:
A patient must not be given any recombinant vWF or vWF concentrates before to testing

SPECIMEN PROCESSING
Specimen processing instructions:
Centrifuge light blue-top tube 15 minutes at approx. 1500 x g within 60 minutes of collection. Using a plastic pipette, remove plasma, taking care to avoid the WBC/platelet buffy layer and place into a plastic vial. Centrifuge a second time and transfer platelet-poor plasma into a new plastic vial. Plasma must be free of platelets (<10,000/mcL). Freeze immediately and ship on dry ice. 
Transport temperature:
Frozen
Specimen stability:
Room temperature: Unacceptable. Refrigerated: Unacceptable. Frozen: 21 days.
Rejection criteria:
Contaminated specimens • Grossly hemolyzed • Lipemic • Improperly stored or handled specimen

TEST DETAILS
CPT code(s):
83520
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.  The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.
Methodology:
Immunoassay
Synonyms:
Quest test code 70068, von Wille Ds, VWD,Type 2 Normandy,von Willebrand Disease 2N,Type II Normandy,von Willebrand Factor: Factor VIII Binding
Clinical significance:
To differentiate between hemophilia A, hemophilia A carrier state, and type 2N vWD. The Type IIN vWD is assocoated with mild to moderate FVIII deficiency and otherwise normal von Willebrand Antigen and Ristocetin Cofactor.

Performing Locations

Quest Diagnostics

Technical Lead: Michael Weaver    
Frequency: Set up: As needed, at least once a month; Report Available: Within 2 days after set up    
Performed stat? No
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