Immunoglobulin M
Test:
263
CPT:
82785
Synonyms
IgM, Serum
Quantitative IgM, Serum
Special Instructions
Indicate the patient’s age on the test request form.
Expected Turnaround Time
Within 1 day
Specimen Requirements
Specimen
Within 1 day
Volume
1 mL (adult), 0.4 mL (pediatric)
Minimum Volume
Container
Red-top tube or gel-barrier tube
Collection
Storage Instructions
Samples suspected of having macroglobulins or cryoglobulins should be drawn and held at 37°C. Samples suspected of containing cold agglutinins should not be refrigerated prior to serum separation from clot.
Causes for Rejection
Excessive lipemia
Test Details
Use
Evaluate humoral immunity; monitor therapy in IgM myeloma