Test Code MACRR Microalbumin / Creatinine Urine Ratio LAB689
Additional Codes
Alternative name: albumin / creatinine ratio
Performing Laboratory
St. Luke's Hospital Cedar Rapids
Specimen Requirements
Container/Tube:
Preferred: Random Urine Collection
Acceptable: 24 hour collection
Specimen Volume: Minimum volume of 80 µL plus a dead volume from a random or 24 hour urine collection.
Stability: 7 days at 20-25 ⁰C, 1 month at 4-8 ⁰C, or 6 months at -20 ⁰C.
Collection Instructions: Samples should not be collected after exertion, in the presence of urinary tract infection, during acute illness, immediately after surgery, or after an acute fluid load. Specimens should be collected without preservatives. Specimens visibly contaminated with blood are not suitable for analysis of albumin concentration.
Reference Values
≤30 mg microalbumin/g creatinine
Day(s) Test Set Up
Monday through Sunday
Useful For
Urine creatinine measurements are used to assess kidney function and in the diagnosis and treatment of renal disease. Protein measurements in urine are used in the diagnosis and treatment of disease conditions such as renal disease, heart disease, or thyroid disorders, which are characterized by proteinuria or albuminuria.
Methodology
Immunoturbidimetric assay
Test Classification and CPT Coding
82043-Microalbumin
82570-Creatinine
Report Available
1 hour upon receipt.