Search our extensive Laboratory Test Directory to find test codes, ordering recommendations, specimen stability information, Test Fact Sheets, and more.
Recommendations when to order or not order the test. May include related or preferred tests.
Not recommended except in suspected cases of acquired von Willebrand disease (VWD) or high suspicion of VWD. Preferred initial test is von Willebrand Panel with Reflex to von Willebrand Multimeric Analysis (2003387).
New York DOH Approval Status
Indicates whether a test has been approved by the New York State Department of Health.
This test is New York state approved.
Specimen Required
Patient PreparationInstructions patient must follow before/during specimen collection.
CollectSpecimen type to collect. May include collection media, tubes, kits, etc.
Lt. blue (sodium citrate). Refer to Specimen Handling at aruplab.com for hemostasis/thrombosis specimen handling guidelines.
Specimen PreparationInstructions for specimen prep before/after collection and prior to transport.
Transfer 3 mL platelet-poor plasma to an ARUP Standard Transport Tube. (Min: 1.5 mL)
Storage/Transport TemperaturePreferred temperatures for storage prior to and during shipping to ARUP. See Stability for additional info.
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.
Unacceptable ConditionsCommon conditions under which a specimen will be rejected.
Serum, EDTA plasma, clotted or hemolyzed specimens.
RemarksAdditional specimen collection, transport, or test submission information.
StabilityAcceptable times/temperatures for specimens. Times include storage and transport time to ARUP.
Ambient: 4 hours; Refrigerated: Unacceptable; Frozen at -20°C: 3 months; Frozen at -70°C: 6 months
Expected turnaround time for a result, beginning when ARUP has received the specimen.
1-11 days
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, 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
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 Multimeric
Normal
Interpretive Data
May include disease information, patient result explanation, recommendations, or details of testing.
This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.
Compliance Category
Laboratory Developed Test (LDT)
Note
Additional information related to the test.
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.
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