Merck Manual

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Classification of Stages of Kidney Disease

Classification of Stages of Kidney Disease

Stagea

1

2

3

4

Nonazotemic Kidney Disease

Mild Renal Azotemia

Moderate Renal Azotemia

Severe Renal Azotemia

Creatinine (mg/dL)

Dogs

<1.4

1.4–2.0

2.1–5.0

>5.0

Cats

<1.6

1.6–2.8

2.9–5.0

>5.0

a Stages are as recommended by the International Renal Interest Society.