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Alpha-2-Macroglobulin
0050005
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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
Wed, 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: 8 hours; Refrigerated: 8 days; Frozen: 1 year (if frozen within 24 hours, avoid repeated freeze/thaw cycles)
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
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