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Test Code C2 C2, Complement, Serum

Performing Laboratory

LabCorp of America


 Immunologic Quantitation by Radial Immunodiffusion(RID)

Reference Values

1.4 - 3.3  mg/dL


Results for this test are for research purposes only by the assay's manufacturer. The performance

characteristics of this product have not been established. Results should not be used as a diagnostic

 procedure without confirmation of the diagnosis by another medically established diagnostic

product or procedure.

Test Classification and CPT Coding



LOINC Code:  4484-2

Specimen Required

Container/Tubes: Red top

Specimen: 2 mL (min 0.1 mL) of serum

Transpoert Temperature: Frozen

Stability: 12 Days- Refrigerated or Frozen

Collection Note: Spin down, separate serum from cells, freeze immediately

Day(s) and Time(s) Performed

Tuesday, Thursday

Computer Interface Code

PDM # 5902250

Use For

Assess patients with hereditary deficiency of this component or acquired decrease in its level which may be seen due to hypercatabolism in hereditary angioneurotic edema, or consumption or loss as in vasculitides, glomerulonephritides, immune complex diseases. C2 deficiency is the most common complement deficiency (1 in 10,000) and is associated with SLE.