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VWD Type 2A/2B Reflex Sequence Analysis

Order Code: 1388

Also Known as

Von Willebrand Factor

Disease State

Test Information

Genetic analysis is used to diagnose type 2A and 2B VWD in patients with abnormal multimer findings. VWF exon 28 sequence analysis is always performed; if negative, VWD Type 2A Additional Exons is performed at an additional charge.

Sample Requirements

Fetal: Amniotic Fluid, CVS, Cultured Amniocytes or Cultured CVS; Parental/Patient: EDTA Whole Blood (lavender top)

Shipping Information

Room Temperature

Requested Volume

Fetal: 7-15 ml Amniotic Fluid or 5-10 mg CVS, backup culture of Amniocytes or CVS is highly recommended; Two T25 flasks Cultured Amniocytes or CVS (2x10^6 minimum); Parental/Patient: 3-5 ml

Minimum/Pediatric Volume

Fetal: Call Laboratory; Parental/Patient: 2 ml

CPT Codes

Exon 28: 81403; 2A: 81406


PCR and Bi-directional DNA Sequencing

Turnaround Time

21 days

New York State Approval


DEX Z-Code™

Yes, visit app.dexzcodes.com


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