Name: Complement C4
Test Name: Complement C4
Health Link Test Code: XC4
LIS Test Code: C4
CPT Code(s): 86160
Complement levels are requested in the following clinical situations: workup for immunodeficiency, assessment of SLE, assessment of disease activity in SLE, assessment of vasculitis (including glomerulonephritis) and assessment of disease activity in vasculitis.
Days Performed: Daily, 24 hours.
In-Lab Turnaround Time: 4 hours.
Stat In-Lab Turnaround Time: 1 hour.
Collection Container: Red cap with yellow ring (SST)
Also Acceptable: Green cap with yellow ring (PST), Green top, Red top
Collection Volume: 4 mL
Pediatric Collection Volume: 0.4 mL
Sample Analyzed: Serum or plasma
Testing Volume: 0.5 mL
Pediatric Testing Volume: 0.2 mL
Centrifuge. If a complete barrier has not formed, transfer cell-free serum/plasma to plastic vial. Refrigerate.
Transport specimen to the laboratory. Transport with coolant pack if coming from clinic location.
Grossly hemolyzed, lipemic and turbid specimens are not acceptable.
|Age||Male (mg/dL)||Female (mg/dL)|
|15 years and up||15-53||15-57|
Interpretation Type: Reference Interval