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Test Code B2M Beta-2-Microglobulin, Serum

Additional Codes


Powerchart: Beta 2 Microglobulin

MA Cerner: Beta 2 Microglobulin

Reporting Name

Beta-2-Microglobulin, S

Useful For

Prognosis assessment of multiple myeloma


Evaluation of renal tubular disorders

Testing Algorithm

For more information, see Multiple Myeloma: Laboratory Screening

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type


Specimen Required

Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 1 mL

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Refrigerated (preferred) 28 days
  Frozen  28 days
  Ambient  14 days

Reference Values

1.21-2.70 mcg/mL

Day(s) Performed

Monday through Friday

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
B2M Beta-2-Microglobulin, S 1952-1


Result ID Test Result Name Result LOINC Value
B2M Beta-2-Microglobulin, S 1952-1

Report Available

Same day/1 to 2 days

Reject Due To

Gross hemolysis OK
Gross lipemia OK
Gross icterus OK

Method Name



If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:

-General Request (T239)

-Renal Diagnostics Test Request (T830)

Secondary ID