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HelpTest Code LAB689 Albumin/Creatinine Ratio, Urine, Random
Performing Laboratory
St. Louis Children's Hospital Laboratory - Chemistry
Specimen Requirements
Patient Preparation: 2nd morning urine is preferred specimen
Collection Container/Tube:
Preferred: Clean, plastic screw-cap urine collection container with no preservatives
Acceptable: Any clean, plastic collection container, no preservatives
Specimen Collection Volume: minimum 1.0 mL urine
Submission Container/Tube: If specimen is coming from outside facility aliquot a minimum of 1.0 mL of urine into a plastic screw-capped tube for transport.
Special Instructions: Send to lab promptly
Sample Rejection
Mislabled or unlabeled specimens
Logistics
Test Availability: Monday-Sunday
Cut-off time: None, performed as received
Turnaround Time: Same Day; 2 hours from receipt in performing lab
Reference Values
Reference Interval:
The American Diabetes Association (ADA) recommends that an albumin/creatinine ratio be reported on all random urine specimens for microalbumin analysis.
In accordance with the American Diabetes Association (ADA) recommendations, the reference range for microalbumin analysis for a random urine collection is:
<30 mcg/mg Cr for the microalbumin to creatinine ratio
Critical Value: None established
Methodology
Immunoturbidmetric Assay
Limitations
- NA
Additional Information
FOR SLCH CORE LABORATORY USE ONLY
Lab Processing Instructions: Mix well and aliqout minimum of 0.5 urine into a Roche-false bottom tube. If specimen is turbid or precipitates are present, mix well and aliquot into plastic container to centrifuge to clear then aliquot cleared urine into the Roche false-bottom tube for testing.
Processed Volume: minimum 0.5 mL urine
Analyte Stability:
| Specimen Type | Temperature | Time |
|---|---|---|
| urine (no preservative) | Ambient | 7 days |
| Refrigerated | 1 month | |
| Frozen | 6 months |
Test Classification and CPT Code
82043 - microalbumin ur
82570 - creatinine ur
LOINC
14957-5
Last Reviewed
07/2025