Saturday, February 24, 2024


Reference Range

Microalbuminuria is defined as excretion of 30–300 mg of albumin per 24 hours (or 20–200 mcg/min or 30–300 mcg/mg creatinine) on 2 of 3 urine collections.

The detection of low levels of albumin excretion (microalbuminuria) has been linked to the identification of incipient diabetic kidney disease. This phase calls for aggressive management to prevent or retard overt diabetic nephropathy.

The reference ranges for microalbumin are detailed in the table below.

Table 1. American Diabetic Association Classification of Microalbuminuria (Open Table in a new window)

Spot Collection

Timed Collection

24-hr Collection


Less than 30 mcg/mg creatinine

Less than 20 mcg/min

Less than 30 mg


30-300 mcg/mg creatinine

20-200 mcg/min

30-300 mg


More than 300 mcg/mg creatinine

More than 200 mcg/min

More than 300 mg

Clinical albuminuria


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