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Test Code B2MC Beta-2-Microglobulin (Beta-2-M), Spinal Fluid

Specimen Required

Container/Tube: Sterile vial

Specimen Volume: 1 mL

Container/Tube: Send spinal fluid from collection vial 1.

Secondary ID


Useful For

Evaluation of central nervous system inflammation and B-cell proliferative diseases

Method Name


Reporting Name

Beta-2-Microglobulin, CSF

Specimen Type


Specimen Minimum Volume

0.5 mL

Specimen Stability Information

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

Reject Due To

Gross hemolysis OK

Reference Values

0.70-1.80 mcg/mL

Day(s) Performed

Monday through Friday

Report Available

Same day/1 to 2 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been modified from the manufacturer's instructions. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
B2MC Beta-2-Microglobulin, CSF 1951-3


Result ID Test Result Name Result LOINC Value
B2MC Beta-2-Microglobulin, CSF 1951-3