Recommendations when to order or not order the test. May include related or preferred tests.
Use for risk stratification and staging of multiple myeloma, Waldenstrom macroglobulinemia, and other lymphoproliferative disorders. Aids in differentiating glomerular and tubular renal disease.
Mnemonic
Unique test identifier.
B2M S
Methodology
Process(es) used to perform the test.
Quantitative Immunoturbidimetry
Performed
Days of the week the test is performed.
Sun-Sat
Reported
Expected turnaround time for a result, beginning when ARUP has received the specimen.
Within 24 hours
New York DOH Approval Status
Indicates test has been approved by the New York State Department of Health.
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect
Serum/plasma separator tube. Also acceptable: Green (lithium heparin), or pink (K2EDTA or K3EDTA).
Specimen Preparation
Allow specimen to clot completely at room temperature. Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.3 mL)
Storage/Transport Temperature
Frozen.
Unacceptable Conditions
CSF (refer to Beta-2 Microglobulin, CSF, ARUP test code 0080054)
Remarks
Stability
After separation from cells: Ambient: 72 hours; Refrigerated: 72 hours; Frozen: 6 months
Reference Interval
Normal range/expected value(s) for a specific disease state. May also include abnormal ranges.
Effective February 22, 2022
<60 years
0.8 - 2.4 mg/L
>60 years
≤3.0 mg/L
Interpretive Data
Background information for test. May include disease information, patient result explanation, recommendations, details of testing, associated diseases, explanation of possible patient results.
The American Medical Association Current Procedural Terminology (CPT) codes published in ARUP's Laboratory Test Directory are provided for informational purposes only. The codes reflect our interpretation of CPT coding requirements based upon AMA guidelines published annually. CPT codes are provided only as guidance to assist clients with billing. ARUP strongly recommends that clients confirm CPT codes with their Medicare administrative contractor, as requirements may differ. CPT coding is the sole responsibility of the billing party. ARUP Laboratories assumes no responsibility for billing errors due to reliance on the CPT codes published.
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
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