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Test ID RA1U Alpha-1-Microglobulin, Random, Urine

Specimen Required

Container/Tube: Plastic, 5-mL tube

Specimen Volume: 5 mL

Collection Instructions:

1. Collect a random urine specimen.

2. No preservative.

Useful For

Assessment of renal tubular injury or dysfunction using random urine specimens


Screening for tubular abnormalities


Detecting chronic asymptomatic renal tubular dysfunction (2)

Profile Information

Test ID Reporting Name Available Separately Always Performed
AIMR Alpha-1-Microglobulin, Random, U No Yes
CRETR Creatinine, Random, U Yes, (Order RCTUR) Yes

Method Name

AIMR: Immunonephelometry

CRETR: Enzymatic Colorimetric Assay

Reporting Name

Alpha-1-Microglobulin, Random, U

Specimen Type


Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Refrigerated (preferred) 7 days
  Frozen  7 days

Reference Values

≥18 years: <35 mg/g creatinine

Reference values have not been established for patients who are less than 18 years of age.

Day(s) Performed


Report Available

1 to 7 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been modified from the manufacturer's instructions. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
RA1U Alpha-1-Microglobulin, Random, U 48415-4


Result ID Test Result Name Result LOINC Value
A1M_U Alpha-1-Microglobulin, Random, U 46723-3
CRETR Creatinine, Random, U 2161-8
A1M_R A1M/Creat Ratio 48415-4


If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.