N18: Chronic kidney disease (CKD)

Codes under N18 (Chronic kidney disease (CKD)). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

Code	Description	Billable
N18.1	Chronic kidney disease, stage 1	✓
N18.2	Chronic kidney disease, stage 2 (mild)	✓
N18.3	Chronic kidney disease, stage 3 (moderate)	—
N18.4	Chronic kidney disease, stage 4 (severe)	✓
N18.5	Chronic kidney disease, stage 5	✓
N18.6	End stage renal disease	✓
N18.9	Chronic kidney disease, unspecified	✓
N18.30	Chronic kidney disease, stage 3 unspecified	✓
N18.31	Chronic kidney disease, stage 3a	✓
N18.32	Chronic kidney disease, stage 3b	✓

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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

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