Complement Component 4
0050155
 
Ordering Recommendation
Mnemonic
C4
Methodology
Quantitative Immunoturbidimetry
Performed
Sun-Sat
Reported
Within 24 hours
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
 
Collect
Serum separator tube. Also acceptable: Lavender (EDTA), pink (K2EDTA), or green (sodium or lithium heparin).  
Specimen Preparation
Allow specimen to clot at room temperature. Separate serum from cells ASAP or within 2 hours of collection and freeze. Transport 0.5 mL serum. (Min: 0.3 mL)  
Storage/Transport Temperature
Frozen.  
Unacceptable Conditions
Specimens left to clot at refrigerated temperature. Specimens exposed to repeated freeze/thaw cycles.  
Remarks
 
Stability
Ambient: 48 hours; Refrigerated: 48 hours; Frozen: 2 weeks (avoid repeated freeze/thaw cycles)  
Reference Interval
0-​30 days: 8-​30 mg/dL
1 month: 9-​33 mg/dL
2 months: 9-​37 mg/dL
3 months: 10-​35 mg/dL
4 months: 10-​49 mg/dL
5 months: 9-​48 mg/dL
6 months: 12-​55 mg/dL
7-​8 months: 13-​48 mg/dL
9-​11 months: 16-​51 mg/dL
1 year: 16-​52 mg/dL
2-​4 years: 12-​47 mg/dL
5-​11 years: 13-​44 mg/dL
12-​17 years: 14-​41 mg/dL
18 years and older: 10-​40 mg/dL
Interpretive Data
Note
CPT Code(s)
86160
Components
Component Test Code*Component Chart Name
0050155Complement Component 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, contact interface support at interface.support@aruplab.com.
Cross References
  • 4th Component of Complement, Serum
  • C4
  • C4 Complement Serum
  • C4, Serum
  • Complement C4, Serum
  • Fourth Component of Complement