Beta-2 Microglobulin (B2MG) - UChicago Medicine Medical Laboratories

Specimen and Container/Tube

Plasma

Rejection Criteria

Whole blood/unspun samples greater than 6 hours will be
rejected.

Turnaround Time

N/A

Specimen Type

Plasma

Preferred Volume

0.5 mL

Offsite Collection Instructions

1. Collect sample following standard collection methods
2. Within 2 hours of collection the sample must be spun and aliquoted
3. Transport refrigerated (2 – 8˚C)

UCMC Collection Instructions

1. Collect sample following standard collection methods
2. Within 2 hours of collection the sample must be received in Laboratory Service Center
3. Transport room temperature (15 – 25˚C)

STAT Turnaround Time

N/A

Test Usage

To be used as an aid in the diagnosis of active rheumatoid factor arthritis and kidney disease.

Critical Results

N/A

Test Limitations

Elevated levels of ��2M occur in renal diseases such as
glomerulopathies, tubulopathies, renal failure and amyloidosis.
In
addition, it has been reported that other increased levels are
found in rheumatoid arthritis and autoimmune diseases.

Additional Information

N/A

Fee Code

30282232

Synonyms

N/A

Container/Tube

Li-Heparin Mint Green Top

Specimen Minimum Volume

0.2 mL

Day(s) Performed

24 hours, 7 days a week including holidays.

STAT DAY(S) AND TIME(S) PERFORMED

N/A

CPT

82232

Method Name

Immunoturbidometric Assay

Reference Values

0.8 �?? 2.3 mg/L

Test Includes

N/A

Reject Due To

Whole blood/unspun samples greater than 6 hours will be rejected.

Included in Additional codes

N/A

Coverage Information

CMS has established a national coverage policy (NCD) for Medicare for this test as of November 25, 2002. Please document medical necessity.

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Stability: Room Temp

2 hours

Stability: Refrigerated

3 days

Stability: Frozen

6 months

Pediatric Volume