Ordering Recommendation

Aids in diagnosis of proximal tubule injury and/or impaired proximal tubular function.

Mnemonic

A1M

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

24-hour urine. Specimen must be refrigerated during collection.

Specimen Preparation

Transfer a 4 mL aliquot from a well-mixed 24-hour collection to an ARUP Standard Transport Tube. (Min: 0.4 mL) Do not add acid or other preservatives. Record total volume and collection time interval on transport tube and test request form.

Storage/Transport Temperature

Refrigerated.

Unacceptable Conditions

Frozen or preserved specimens.

Remarks
Stability

Ambient: 8 hours; Refrigerated: 8 days; Frozen: Unacceptable

Reference Interval

0.0-1.2 mg/dL

Interpretive Data



Compliance Category

FDA

Note

Hotline History

N/A

CPT Codes

83883

Components

Component Test Code* Component Chart Name LOINC
0050043 Alpha-1-Microglobulin, Urine 31151-4
* 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

  • A1M urine
  • A1MU
  • alpha1-microglobulin, urine
  • Urinary Alpha-1-Microglycoprotein
Alpha-1-Microglobulin, Urine