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0050005
Alpha-2-Macroglobulin
A2M
Ordering Recommendation
May be used as a marker of membrane permeability in urine or as an indirect marker for liver fibrosis.
New York DOH Approval Status
This test is New York state 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)
Methodology
Quantitative Nephelometry
Performed
Sun-Sat
Reported
1-5 days
Reference Interval
131-293 mg/dL
Interpretive Data
Compliance Category
FDA
Note
Hotline History
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
