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UW Health SMPH
American Family Children's Hospital

UW Hospital and Clinics Lab Test Directory

Test Name: von Willebrand Platelet-Type Sequence Analysis

Test Code(s): VWPTS / HCVWPTS

CPT Code(s): 81479

Methodology: PCR followed by Direct Sequencing

Testing Site: Testing will be sent to an approved reference laboratory.

Turnaround Time: Routine: Approximately 1 month.

Specimen Requirements

Specimen: Blood

Collection Container: Preferred: Lavender top

Collection Volume: Preferred: 5 mL
Pediatrics: 3 mL

Sample Analyzed: Whole Blood

Specimen Transport: Transport specimen to UWHC Core Laboratory (B4/220). Transport with coolant pack if coming from outreach location.

Stability: Ambient: 14 days
Refrigerated: 30 days
Frozen: Not acceptable


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