Search Browse Crosswalk Fees Tools Pricing

Codelle

AI-powered medical coding assistant for healthcare practices and billers.

Pricing Privacy Terms

© 2026 Codelle. All rights reserved.

CPT® copyright 2026 American Medical Association. All rights reserved. CPT is a registered trademark of the American Medical Association. Applicable FARS/DFARS restrictions apply to government use. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use.

ICD-10-CM N18 — Chronic kidney disease (CKD) | Codelle

N18

ICD-10-CM

Chronic kidney disease (CKD)

Clinical Notes

Code first

any associated:
diabetic chronic kidney disease (E08.22, E09.22, E10.22, E11.22, E13.22)
hypertensive chronic kidney disease (I12.-, I13.-)

Use additional code

code, if applicable, to identify:
associated cachexia (E88.A)
kidney transplant status (Z94.0)

Code Hierarchy

Subcodes (7)

N18.1Chronic kidney disease, stage 1

N18.2Chronic kidney disease, stage 2 (mild)

N18.3Chronic kidney disease, stage 3 (moderate)

N18.4Chronic kidney disease, stage 4 (severe)

N18.5Chronic kidney disease, stage 5

N18.6End stage renal disease

N18.9Chronic kidney disease, unspecified

Same Category

N18.1Chronic kidney disease, stage 1 N18.2Chronic kidney disease, stage 2 (mild)N18.3Chronic kidney disease, stage 3 (moderate)N18.30Chronic kidney disease, stage 3 unspecified N18.31Chronic kidney disease, stage 3a N18.32Chronic kidney disease, stage 3b N18.4Chronic kidney disease, stage 4 (severe)

N18.5Chronic kidney disease, stage 5

N18.6End stage renal disease

N18.9Chronic kidney disease, unspecified