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C1-Esterase Inhibitor
0050140
Ordering Recommendation

Aids in diagnosis of hereditary angioedema and monitoring response to therapy.

Mnemonic
C1ESTER
Methodology
Quantitative Nephelometry
Performed
Sun, Wed, Fri
Reported
1-4 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
 
Collect
Serum separator tube. 
Specimen Preparation
Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.4 mL) 
Storage/Transport Temperature
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered. 
Unacceptable Conditions
Non-frozen specimens. 
Remarks
 
Stability
After separation from cells: Ambient: 2 hours; Refrigerated: 2 hours; Frozen: 2 weeks 
Reference Interval
21-39 mg/dL
Interpretive Data


Note
Hotline History
N/A
CPT Code(s)
86160
Components
Component Test Code*Component Chart NameLOINC
0050140C-1-Esterase Inhibitor4477-6
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • C1 esterase inhibitor
  • C1 Esterase Inhibitor Antigen, S
  • C1 Esterase Inhibitor Antigen, Serum
  • C1 Esterase Inhibitor Quantitative
  • C1 Inactivator, Quantitative
  • C1 Inhibitor
  • C1 Inhibitor Antigenic Protein
  • C1 inhibitor level
  • HAE
  • Hereditary Angioedema