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Complement Component 5
0050156
Ordering Recommendation
Follow-up test for complement activity screening when CH50 and AH50 are low or absent and high suspicion remains for complement deficiency.
Mnemonic
C5
Methodology
Quantitative Radial Immunodiffusion
Performed
Tue, Fri
Reported
3-8 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
Allow specimen to clot for one hour at room temperature. Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube and freeze immediately. (Min: 0.3 mL)  
Storage/Transport Temperature
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.  
Unacceptable Conditions
Non-frozen specimens. Specimens exposed to repeated freeze/thaw cycles. Specimens left to clot at refrigerated temperature.  
Remarks
 
Stability
After separation from cells: Ambient: 2 hours; Refrigerated: Unacceptable; Frozen: 2 weeks  
Reference Interval
7-20 mg/dL
Interpretive Data


Note
CPT Code(s)
86160
Components
Component Test Code*Component Chart NameLOINC
0050156Complement Component 54505-4
* 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
  • C5
  • C5 Antigen
  • C5 Level
  • complement terminal pathway
  • Fifth component of complement
  • Terminal Pathway - Complement