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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


Preferred: Random Urine Collection

Acceptable:  24 hour collection

Specimen Volume: 1 mL from a random or 24 hour urine collection.

Stability: Specimens may be stored at 2-8° C for up to one week.  Do not freeze.

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

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.

Day(s) Test Set Up

Monday through Sunday


Urine microalbumin:  nephelometry

Urine creatinine:  enzymatic

Test Classification and CPT Coding