Clinics and Departments

Laboratory Services

Lab Dept:

Chemistry

Test Name:

IgM (IMMUNOGLOBULIN M)

General Information

Lab Order Codes:

IGM

Synonyms:

Immunoglobulin M

CPT Codes:

82784 – Gammaglobulin; IgM, each

Test Includes:

IgM concentration reported in mg/dL.

Logistics

Test Indications:

Immunoglobulins, also known as humoral antibodies, recognize antigens and initiate mechanisms that destroy antigens. IgM is the most primitive, least specialized immunoglobulin, and the only immunoglobulin that a neonate normally synthesizes. IgM is synthesized against antigens confined to the blood, such as erythrocyte surface antigens and tropical parasites.

Lab Testing Sections:

Chemistry (all specimens analyzed at Mpls campus)

Phone Numbers:

MIN Lab: 612-813-6280

STP Lab: 651-220-6550

Test Availability:

Daily, 24 hours

Turnaround Time:

1 - 3 days, test performed Tuesday, Wednesday and Friday.

Special Instructions:

N/A

Specimen

Specimen Type:

Blood

Container:

Red top (plain, no gel) tube

Draw Volume:

0.6 mL blood

Processed Volume:

0.2 mL serum

Collection:

Routine venipuncture

Special Processing:

Lab Staff: Centrifuge specimen, remove serum aliquot into a plastic sample cup. Centrifuge turbid or particulate serum samples prior to analysis. Store at refrigerated temperatures.

Patient Preparation:

None

Sample Rejection:

Unlabeled specimens; specimens other than serum

Interpretive

Reference Range:

Newborn:

0 – 24 mg/dL

1 month:

19 – 83 mg/dL

2 months:

16 – 100 mg/dL

3 months:

23 – 85 mg/dL

4 months:

26 – 96 mg/dL

5 months:

31 – 103 mg/dL

6 months:

33 – 97 mg/dL

7 – 9 months:

30 – 120 mg/dL

10 months – 1 year:

39 – 142 mg/dL

2 years:

46 – 160 mg/dL

3 – 5 years:

41 – 190 mg/dL

6 – 8 years:

46 – 197 mg/dL

9 – 10 years:

49 – 230 mg/dL

>10 years

21 – 290 mg/dL

Critical Values:

N/A

Limitations:

N/A

Methodology:

Nephelometry BN Prospec

References:

Tietz (1999) Textbook of Clinical Chemistry, 3rd edition, Philadelphia, WB Saunders Company, pp 507-509

N Antisera to Human Immunoglobulins (IgG, IgA, IgM) Package Insert (June 2008) Siemens Healthcare Diagnostics, Newark, DE



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