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Immunoglobulin M
MessageChemistry
Test Code
LAB72
CPT Codes
82784
Preferred Specimen
Gold top (serum separator tube)
Minimum Volume
Whole blood: 600 uL (TWO full red-top microtainers or one full light green-top microtainer).
Serum/plasma: 300 uL
Serum/plasma: 300 uL
Other Acceptable Specimens
Red Top and light green top (lithium heparin plasma) acceptable
Specimen Stability
Ambient: up to 24 hours
Refrigerated: 7 days
Frozen up to 4 weeks
Refrigerated: 7 days
Frozen up to 4 weeks
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Turbid Specimens.
Setup Schedule
Everyday
Report Available
Same day
Limitations
An abnormally elevated level of a monoclonal immunoglobulin, as in cases of multiple myeloma, amyloidosis, or other lymphoproliferative diseases, may interfere with the quantification of IgM.
Reference Range
40 - 230 mg/dL
Performing Laboratory
Hoag Newport
