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