What Does a Kidney Function Test Show?

Kidney tests assess how well your kidneys filter waste.

Key Tests

• Creatinine: 0.6–1.3 mg/dL
• eGFR: above 90
• BUN: 6–24 mg/dL
• Urine albumin: below 30 mg/g

CKD Stages

• Stage 1: eGFR 90+
• Stage 2: 60–89
• Stage 3: 30–59
• Stage 4: 15–29
• Stage 5: below 15

Who Should Be Tested

• Diabetics annually
• Hypertensive patients
• Family history
• Age above 60