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Test Code MCRALB Microalbumin, Urine, 24-Hour, LAB410

Performing Laboratory

St. Luke's Hospital Cedar Rapids

Specimen Requirements


Preferred: Random Urine Collection

Specimen Volume: 4mL of urine (minimum volume of 1mL) from a 24-hour 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/24 hours

Day(s) Test Set Up

Monday through Sunday

Useful For

Measurements of albumin in urine are used as an aid in monitoring the development of incipient diabetic nephropathy and for the diagnosis and treatment of a variety of diseases characterized by albuminuria.



Test Classification and CPT Coding

81050-Timed urine measurement