IMMUNOGLOBULIN M, SERUM

Test Code

IGM

Alias/See Also

Quantitative Immunoglobulins

CPT Codes
82784

Preferred Specimen

1 Gold tube (gel separator)

Minimum Volume

0.5 mL

Other Acceptable Specimens

1 Lavender tube (EDTA), or
1 Green tube (Lithium Heparin)

Instructions

Centrifuge for complete separation of plasma or serum and red cells. Separate and refrigerate until tested.

Transport Temperature

Refrigerate

Specimen Stability

2-8°C up to 3 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Hemolyzed or lipemic samples

Methodology

Immunoturbidimetric

Setup Schedule

M, T, W, Th, F, Sa, Sun

Report Available

Same day tested at the performing laboratory.
Elevated IgM results will need to be repeated on a different analyzer.
Repeat testing performed M-F, day shift only.

Reference Range

50 - 400 mg/dL

Clinical Significance

Aid in the diagnosis of autoimmune disease, liver function, chronic and recurrent infections; Evaluate humoral immunity

Performed By
Alverno Laboratories

Performing Laboratory
Alverno Central Lab
NCHB1 (Chemistry, Beckman AU)

Last Updated: April 7, 2025

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.