Geisinger Medical Laboratories/Geisinger Proven Diagnostics Test Catalog

Test Name: Sunquest Test Code Epic Procedure Code Or ID CPT Code:  


Sunquest Test Code:
VONWIM      Geisinger Epic Procedure Code: 85247         Geisinger Epic ID: 7128

Specimen type:
Preferred collection container:
Specimen required:
Three (3) 1 mL aliquots from a light blue top tube. Please submit a separate frozen aliquot for this test. It may not be combined with any other test requiring a frozen aliquot.
Special notes:
Tubes must be filled to completion to ensure the proper 9:1 blood to anticoagulant ratio is achieved. Specimen should be collected before coagulation factor replacement therapy is started. Specimen must be centrifuged within 60 minutes of collection.
Patient preparation:
Specimen should be collected before coagulation factor replacement therapy is started.

Specimen processing instructions:
Centrifuge 10 minutes at 3000 rpm. MUST BE SPUN WITHIN 60 MINUTES OF COLLECTION. Double-centrifuged specimens are critical for accurate results, as platelet contamination may cause spurious results. Specimen must be sent to GMC to do testing for Ristocetin cofactors, Factor 8 assay, and Factor 8 antigen before sending to Quest. 
Transport temperature:
Specimen stability:
Room Temperature: Unacceptable. Refrigerated: Unacceptable. Frozen: 6 months.
Rejection criteria:
Thawed plasma received room temperature or refrigerated is unacceptable. Hemolyzed specimens unacceptable. 3.2% citrated plasma, shipped frozen, is the only acceptable sample type. All other anticoagulants (heparin, EDTA, oxalate) are NOT acceptable.

CPT code(s):
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.
Test includes:
von Willebrand Factor Antigen Multimeric Analysis.
Von Willebrand Factor Multimer
Quest test code 5168

Performing Locations

Quest Diagnostics

Technical Lead: Michael Weaver    
Frequency: Monday-Friday morning. Report available 4-8 days.    
Performed stat? No
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*GMC - Geisinger Medical Center; GWV - Geisinger Wyoming Valley Medical Center; GSACH - Geisinger Shamokin Area Community Hospital; GBH - Geisinger Bloomsburg Hospital;
GCMC - Geisinger Community Medical Center (Scranton); GLH - Geisinger Lewistown Hospital; GHS - Geisinger Holy Spirit; GJSH - Geisinger Jersey Shore Hospital,
GSWB - Geisinger South Wilkes-Barre