Category: Immunoglobulin/ Complement
Test Code: 401
Methodology: Nephelometry
Reference Range: Normal Range: Accompanies report (age dependent).
CPT Code: 83883
Schedule / Turnaround Time: Report availability is one week from the time of specimen receipt.
Specimen Requirements:

Specimen need not be refrigerated or frozen. Collect 2-3 ml of blood in a red top or serum separator tube. If possible, separate serum from clot and place into white tube provided with Immco Diagnostics’ collection kits. If separation facilities are not available, the blood can be sent in the tube used for collection.

Sample Stability:

Sample is stable at ambient temperature during shipment. If sample is stored prior to shipment, it is stable refrigerated (2-8˚C) up to five days and frozen (-20˚C or lower) up to one year.


IgA is the major immunoglobulin class of sero-mucous secretions, part of the defense system for external body surfaces. Elevated IgA levels are associated with breast feeding, chronic infections, liver diseases and myeloma. Reduced levels may be associated with certain protein losing conditions. Normal serum levels vary with age and race.