Expected turnaround time for a result, beginning when ARUP has received the specimen.
1-11 days
New York DOH Approval Status
Indicates test has been approved by the New York State Department of Health.
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect
Lt. blue (sodium citrate). Refer to Specimen Handling at aruplab.com for hemostasis/thrombosis specimen handling guidelines.
Specimen Preparation
Transfer 3 mL platelet-poor plasma to an ARUP Standard Transport Tube. (Min: 1.5 mL)
Storage/Transport Temperature
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.
Unacceptable Conditions
Serum. Clotted. Non-frozen or hemolyzed specimens.
Remarks
Stability
Ambient: 4 hours; Refrigerated: Unacceptable; Frozen at -20°C: 3 months; Frozen at -70°C: 6 months
Reference Interval
Normal range/expected value(s) for a specific disease state. May also include abnormal ranges.
Test Number
Components
Reference Interval
Factor VIII, Activity
Age
Reference Interval (%)
0-6 years
56-191
7-9 years
76-199
10-11 years
80-209
12-13 years
72-198
14-15 years
69-237
16-17 years
63-221
18 years and older
56-191
von Willebrand Factor, Activity (RCF)
Age
Reference Interval (%)
0-6 years
51-215
7-9 years
52-176
10-11 years
60-195
12-13 years
50-184
14-15 years
50-203
16-17 years
49-204
18 years and older
51-215
von Willebrand Factor, Antigen
Age
Reference Interval (%)
0-6 years
52-214
7-9 years
62-180
10-11 years
63-189
12-13 years
60-189
14-15 years
57-199
16-17 years
50-205
18 years and older
52-214
Interpretive Data
Background information for test. May include disease information, patient result explanation, recommendations, details of testing, associated diseases, explanation of possible patient results.
Compliance Category
FDA
Note
Additional information related to the test.
If von Willebrand ristocetin cofactor (RCF) or von Willebrand factor antigen (vWF Ag) or Factor VIII is low, von Willebrand Multimeric Analysis testing will be added. If the ratio of RCF/vWF Ag is less than 0.7, vW Multimeric Analysis testing will be added.
Hotline History
N/A
CPT Codes
The American Medical Association Current Procedural Terminology (CPT) codes published in ARUP's Laboratory Test Directory are provided for informational purposes only. The codes reflect our interpretation of CPT coding requirements based upon AMA guidelines published annually. CPT codes are provided only as guidance to assist clients with billing. ARUP strongly recommends that clients confirm CPT codes with their Medicare administrative contractor, as requirements may differ. CPT coding is the sole responsibility of the billing party. ARUP Laboratories assumes no responsibility for billing errors due to reliance on the CPT codes published.
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
Other names that describe the test. Synonyms.
Coag
von Willebrand Profile
von Willebrand Panel with Reflex to von Willebrand Multimeric Analysis
Chat
Feedback
