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Factor VIII (F8) Inversion Analysis

Order Code: 1402 Get Requisition Form
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Test Information
Factor 8 (F8) inversion analysis evaluates both the intron 1 and intron 22 inversions, and is recommended only for males with severe hemophilia A, or females who have a family history of severe unknown type of hemophilia A, or females with low factor VIII levels who have no known family history of hemophilia. This assay is included in the Factor VIII (F8) severe HA Analysis-Reflex test. F8 variants other than inversions are not detected by this assay.
Also Known As Icon
Also Known As
  • F8
  • Factor 8
Disease State Icon
Disease State
Test Type Icon
Test Type
Genetic Test
Sample Notes Icon
Sample Notes
EDTA Whole Blood, EDTA Bone Marrow, DNA, Buccal Swabs, Amniotic Fluid, Cultured Amniocytes, Direct or Cultured CVS
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Requested Volume
3-5 mL EDTA Whole Blood or Bone Marrow (lavender top), 3-4 Buccal Swabs, >=1 ug DNA at >=50 ng/uL, 7-15 mL Amniotic Fluid, 5-10 mg CVS, 2-T25 flasks cultured amniocytes or CVS (2x10^6 minimum)
Minimum / Pediatric Volume Icon
Minimum / Pediatric Volume
Fetal: Call Laboratory; Parental/Patient: 2 mL EDTA whole blood
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Shipping Information
Room Temperature or Refrigerated
CPT Codes Icon
CPT Codes
  • 81403
Method Icon
Long-range PCR and gel electrophoresis
Turnaround Time Icon
Turnaround Time
5-7 days
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New York State Approval
For panels or algorithms, refer to each individual component assay for approval status
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DEX Z-Code™
Yes, visit
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Diagnostic laboratory services including HLA testing, donor testing, immunohematology reference lab testing, hematology testing and more.
Hematology Testing
Versiti provides von Willebrand factor tests, aHUS diagnosis, hemophilia lab tests and other laboratory diagnosis of bleeding and clotting disorders.
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Research investigators, postdoctoral fellows and laboratory staff at Versiti Blood Research Institute and Diagnostic Laboratories.
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