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Patient Education

Mayo Clinic Laboratories

Test Code LAB72 Immunoglobulin M (IgM), Serum/Plasma

Additional Codes

45960

Reporting Title

IgM

Methodology

Immunoturbidimetric Assay

Note: LAB166 “Immunoglobulins (IgG, IgA, and IgM)” orders IgG, IgA, and IgM.

Useful in the detection or monitoring of monoclonal gammopathies and immune deficiencies. #46015 “Immunofixation, Serum” is usually required to characterize a monoclonal protein.

Performing Laboratory

OhioHealth Laboratory Services-RMH Special Testing

Specimen Requirements

Draw blood in a gold-top serum gel tube(s). Spin down and send 0.5 mL of serum refrigerated.

Note:

1.A speckled-top serum gel tube (s) or a plain, red-top tube(s) is also acceptable.

2.A mint green (heparin) gel tube is also acceptable

 

Specimen Stability Information

Specimen Type Temperature Time
Serum or plasma Refrigerated 4 months
  Ambient  2 months
  Frozen  6 months

 

Specimen Transport Temperature

Refrigerate/Ambient OK/Frozen OK

Reference Values

Cord blood:  <24 mg/dL
0-3 months:  14-100 mg/dL

3-7 months:  24-105 mg/dL

7-12 months:  33-119 mg/dL

1-6 years:  43-190 mg/dL

6-9 years:  48-200 mg/dL

9-11 years:  48-228 mg/dL

>11 years:  43-238 mg/dL

Day(s) Test Set Up

Monday through Friday; Day and evening shifts

Saturday and Sunday; Day shift

Test Classification and CPT Coding

82784