Test Name

IgM
Quantitative

Test Code

624

Unit

mg/dL

Station

Chemistry

Synonym Name/Abbreviation

Quantitative IgM, Serum, IgM,
Serum

CPT Code

82784

Performing Facility

American Medical Labs, Herzliya
Pituah

Analyzer

Roche cobas 6000

Test Method

Immunoturbidimetric

AML Preferred Tube

5 mL SST gel

Storage Instructions

Refrigerated. Separate serum from cells within 45
minutes.

Stability:

 2 months at 15
to 25 ^oC

4 months at 2 to 8 ^oC

 6 months at
-15  to -25
^oC.

Min. Volume

1 mL

Comments

State patients age on the request form. Reference range is
age dependent

Turn-Around-Time

One day

Intended Use

Evaluate humoral immunity; establish the diagnosis and
monitor therapy in macroglobulinemia of Waldenstr?m or plasma cell
myeloma. IgM levels are used to evaluate likelihood of in utero infections
or acuteness of infection. The majority of rheumatoid factors are IgM. IgM
will be decreased in congenital or acquired hypogammaglobulinemia, and
this will be associated with increased, recurrent
infection.

Limitations

Samples suspected of having macroglobulins or cryoglobulins
should be drawn and held at 37C. Samples suspected of containing cold
agglutinins should not be refrigerated prior to serum separation from
clot.

Measuring range: 25 to 650
mg/dL.

Patient Preparation

No patient preparation
needed.

Reasons for Rejection

Excessive lipemia

Adult Reference Ranges

 40 to 230
mg/dL