Ordering Recommendation
May be used as a marker of membrane permeability in urine or as an indirect marker for liver fibrosis.
Mnemonic
A2M
Methodology
Quantitative Nephelometry
Performed
Sun-Sat
Reported
1-5 days
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect
Serum Separator Tube (SST).
Specimen Preparation
Separate from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.4 mL)
Storage/Transport Temperature
Refrigerated.
Unacceptable Conditions
CSF. Hemolyzed specimens.
Remarks
Stability
After separation from cells: Ambient: Unacceptable; Refrigerated: 7 days; Frozen: 3 months (if frozen within 24 hours; avoid repeated freeze/thaw cycles)
Reference Interval
131-293 mg/dL
Interpretive Data
Compliance Category
FDA
Note
Hotline History
Hotline History
Date of Change
Test Name Change
Methodology
Performance/Reported Schedule
Specimen Requirements
Reference Interval
Interpretive Data
Note
CPT Code
Component Change
Other Interface Change
New Test
Inactive
N/A
CPT Codes
83883
Components
Component Test Code* | Component Chart Name | LOINC |
---|---|---|
0050005 | Alpha-2-Macroglobulin | 29944-6 |
* 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.
Aliases
- a2-macroglobulin
- A2M/a2M
- AMG, macroglobulin
- Macroglobulin, Alpha-2
Alpha-2-Macroglobulin