Stages of CKD

Estimated GFR (ml/min/1.73m²)

% Of kidney function

Comments

Stage 1

≥90

90% - 100%

There is kidney damage with normal kidney function/proteinuria.

Stage 2

60 - 89

60% - 89%

There is kidney damage with mild kidney function.

Stage 3a

Stage 3b

30 - 59

30% - 59%

There is low risk of progression to kidney function. It is a mild to moderate loss of kidney function (3a).

Also, there is moderate to severe loss of kidney (3b).

Stage 4

15 - 29

15% - 29%

There is high risk to progression of kidney failure. Severe loss of kidney function.

Stage 5

<15

Less than 15%

There is kidney failure.