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Test Code
CEI
Test Name
C1-Esterase Inhibitor
CPT Codes
86160
Expected Turnaround Time
3 - 4 days
Clinical Utility

C1 esterase inhibitor is decreased in hereditary angioneurotic edema; decrease may be functional or quantitative.
Specimen and Container Info

Specimen Type: Serum

Collection Container: Gold Top, Serum Separator

Alternative Collection Container: Red Top, Plain

Desired Specimen Volume: 1 mL
Collection Instructions
  1. Collect gold top, serum separator tube via venipuncture
Processing and Submission Instructions
  1. Separate serum from cells within 30 to 60 minutes after collection
  2. Transfer 1 mL of serum to a clear aliquot tube.
Transport Instructions

Transport to the laboratory refrigerated. 
Stability Requirements

Room Temperature

 14 days

Refrigerated

14 days

Frozen

14 days

Freeze/Thaw Cycles

 Stable x3
Causes for Rejection
  • Microbially-contaminated samples
  • Hemolysis
  • Gross lipemia that cannot be cleared by ultracentrifugation
  • Citrated plasma (heparinized plasma is acceptable)
Methodology
Immunologic, quantitative
Reference Intervals

See patient report.
Reference Lab
Labcorp Of America Holdings
Testing Schedule
Monday-Friday
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
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