Test Code B2M Beta-2-Microglobulin, Serum
Reporting Name
Beta-2-Microglobulin, SUseful For
Prognosis assessment of multiple myeloma
Evaluation of renal tubular disorders
Testing Algorithm
See Laboratory Screening Tests for Suspected Multiple Myeloma in Special Instructions.
Performing Laboratory

Specimen Type
SerumSpecimen Required
Container/Tube:
Preferred: Serum gel
Acceptable: Red top
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 |
Special Instructions
Reference Values
1.21-2.70 mcg/mL
Day(s) and Time(s) Performed
Monday through Friday; 3 p.m.
Test Classification
This test has been cleared, approved or is exempt by the U.S. 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
82232
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 |
Reject Due To
Gross hemolysis | OK |
Gross lipemia | OK |
Gross icterus | OK |
Method Name
Nephelometry
Forms
If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:
-General Request (T239)
-Renal Diagnostics Test Request (T830)