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Order Code: 1502 Get Requisition Form
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Test Information
C4 levels may be useful in distinguishing systemic activation of the classical versus alternative complement pathways.
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Also Known As
  • aHUS
  • C4
  • Complement Protein
  • Compliment Protein 4
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Disease State
Atypical Hemolytic Uremic Syndrome
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Test Type
Functional/Serologic Test
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Sample Notes
Serum (Red Top - no serum separator)
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Requested Volume
Two 2 ml aliquots
Minimum / Pediatric Volume Icon
Minimum / Pediatric Volume
One 2 ml aliquot
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Additional Sample Information
Sample should be spun down, taken off the clot, and frozen within 2 hours of draw. Send on dry ice. Frozen serum stable up to 6 months. Avoid freeze/thaw cycles.
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Shipping Information
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CPT Codes
  • 86160
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Turnaround Time
7-10 days
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New York State Approval
Please contact Versiti Client Services for the latest New York State approval information
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DEX Z-Code™
Diagnostic Laboratories
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.
Our Experts
Research investigators, postdoctoral fellows and laboratory staff at Versiti Blood Research Institute and Diagnostic Laboratories.
Access requisitions for Versiti Diagnostic Laboratories.