Test ID: Z1030
CPT code: 86160
LOINC: 4478-4
Specimen Type: Red or SST
Frequency: 7 – 9 days
Instructions: 1 mL Serum from Red or SST, Ambient. Min 0.1 mL.
Text: Used to evaluate the classical complement pathway. Levels are depressed in various immunodeficiency states including x-linked hypogammaglobulinemia and severe combined immunodeficiency (10% to 25% of normal levels). Genetic deficiencies of C1q have been described.
Methodology: Radial immunodiffusion (RID)