Skip Ribbon Commands
Skip to main content
Sign In
Navigate Up

22347 Beta-2 Microglobulin

Beta-2 Microglobulin
Test Code: B2M
Synonyms/Keywords
B2M​, B2MICRO
Useful For
Beta 2 microglobulin levels are useful as predicters of longevity in patients with multiple myeloma, and are useful in monitoring patients who have undergone renal transplants.​

In inflammatory disorders (RA, SLE, Sjogren's Syndrome and Crohn's disease) and lymphoproliferative diseases (multiple myeloma, B cell lymphoma, CLL), serum B2M levels are frequently elevated reflecting an increased rate of synthesis. B2M levels in the serum are also useful for monitoring renal transplant patients.
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
No​ Serum​ Red Top Tube (RTT)​
Serum Separator Tube (SST)
 0.5 mL​ 0.4 mL​ 0.3 mL​
Collection Processing Instructions

​Separate serum from cells within 2 hours of collection.

Specimen Stability Information
Specimen Type Temperature Time
Serum Refrigerate​ 7 days​
Frozen 2 months​
Rejection Criteria
​Plasma samples
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ Monday through Friday​ 6-8 hours​ Turbidimetric method/The Binding Site Optilite analyzer
Reference Range Information
Performing Location Reference Range
Marshfield​ 0.9-2.4 mg/L​
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
82232​ ​ ​ ​ ​
Synonyms/Keywords
B2M​, B2MICRO
Ordering Applications
Ordering Application Description
​Cerner ​Beta 2 Microglobulin
​COM ​Beta 2 Microglobulin - Blood
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
No​ Serum​ Red Top Tube (RTT)​
Serum Separator Tube (SST)
 0.5 mL​ 0.4 mL​ 0.3 mL​
Collection Processing

​Separate serum from cells within 2 hours of collection.

Specimen Stability Information
Specimen Type Temperature Time
Serum Refrigerate​ 7 days​
Frozen 2 months​
Rejection Criteria
​Plasma samples
Useful For
Beta 2 microglobulin levels are useful as predicters of longevity in patients with multiple myeloma, and are useful in monitoring patients who have undergone renal transplants.​

In inflammatory disorders (RA, SLE, Sjogren's Syndrome and Crohn's disease) and lymphoproliferative diseases (multiple myeloma, B cell lymphoma, CLL), serum B2M levels are frequently elevated reflecting an increased rate of synthesis. B2M levels in the serum are also useful for monitoring renal transplant patients.
Reference Range Information
Performing Location Reference Range
Marshfield​ 0.9-2.4 mg/L​
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ Monday through Friday​ 6-8 hours​ Turbidimetric method/The Binding Site Optilite analyzer
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
82232​ ​ ​ ​ ​
For most current information refer to the Marshfield Laboratory online reference manual.