von Willebrand Panel

von Willebrand Panel

Test Code

91242
85240, 85246, 85245, 85730
CPT Code is subject to a Medicare Limited Coverage Policy and may require a signed ABN when ordering.
91242
85240, 85246, 85245, 85730
CPT Code is subject to a Medicare Limited Coverage Policy and may require a signed ABN when ordering.
This test is not available in all locations. Please provide SERVICE AREA INFORMATION to confirm Test Code for the lab that services your account or to find available tests you can order.
In-home collection is not available in your area through Quest Mobile.

Clinical Significance

von Willebrand Panel - von Willebrand disease is the most common bleeding disorder. The diagnosis can only be assured by performing a multiplicity of tests to confirm the diagnosis, and to distinguish type 1, type 2, and type 3 disease types which require different treatment programs. It is essential to measure FVIII activity along with vWF Antigen, Functional vWF Activity by Ristocetin Cofactor and measure Multimeric analysis of von Willebrand Protein to characterize intermediate and high weight forms.

Test Resources

None found for this test
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Test Details

Includes

  • Factor VIII Activity, Clotting
  • von Willebrand Factor Antigen
  • Ristocetin Cofactor
  • Partial Thromboplastin Time, Activated

Methodology

Immunoturbidimetric Assay • Photometric Clot Detection • Photo-Optical Clot Detection • Platelet Agglutination

Reference Range(s)

See individual tests

Alternative Name(s)

von Willebrand Disease (VWD)

LOINC® Codes, Performing Laboratory

Service Area must be determined
Factor VIII Activity, Clotting
von Willebrand Factor Antigen
Ristocetin Cofactor
Partial Thromboplastin Time, Activated

Methodology

Immunoturbidimetric Assay • Photometric Clot Detection • Photo-Optical Clot Detection • Platelet Agglutination

Reference Range(s)

See individual tests

Alternative Name(s)

von Willebrand Disease (VWD)
Service Area must be determined

Preferred Specimen(s)

3.6 mL platelet-poor plasma collected in 3.2% sodium citrate (light blue-top) tube

Minimum Volume

1.8 mL

Transport Container

Transport tube

Transport Temperature

Frozen

Specimen Stability

  • Room temperature: Unacceptable
  • Refrigerated: Unacceptable
  • Frozen: 14 days

Reject Criteria

Hemolysis • Lipemia

Setup Schedule

Service Area must be determined
3.6 mL platelet-poor plasma collected in 3.2% sodium citrate (light blue-top) tube
1.8 mL
Transport tube
Frozen
Room temperature: Unacceptable
Refrigerated: Unacceptable
Frozen: 14 days
Hemolysis • Lipemia
Service Area must be determined
This test is not available in all locations. Please provide ACCOUNT INFORMATION NEEDED to confirm Test Code for the lab that services your account or to find available tests you can order.
In-home collection is not available in your area through Quest Mobile.
Test Details

Clinical Significance

Test Resources

Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

The CPT codes provided are based on AMA guidance and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

This material contains content from LOINC® (http://loinc.org). The LOINC Table, LOINC Table Core are copyright © 1995-2019, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license.

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