von Willebrand Disease Evaluation

TEST: 500247
Test number copied
CPT: 83520; 85240; 85245, 85246; 85730
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Test Includes

aPTT, Factor VIII Activity, von Willebrand Factor Activity, von Willebrand Factor Antigen, von Willebrand Factor Collagen Binding Activity, von Willebrand Factor Collagen Binding Ratio

Expected Turnaround Time

2 - 7 days

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

Specimen Requirements

Specimen

Citrated plasma

Volume

Three tubes, 1mL each

Minimum Volume

One tube, 1 mL (Note: This volume does not allow for repeat testing.)

Container

Light blue-top (sodium citrate) tube

Storage Instructions

Ship frozen on dry ice.

Test Details

Limitations

This procedure may be considered by Medicare and other carriers as investigational and, therefore, may not be payable as a covered benefit for patients.

Methodology

See individual assays