ICD-10-CM 2027
ICD-10 code for CKD (chronic kidney disease)
Confirmed by the official ICD-10-CM index entry “disease, diseased › kidney (functional) (pelvis) › chronic”. Page updated September 29, 2026.
About coding CKD
The ICD-10-CM code for CKD (chronic kidney disease) is N18.9 (Chronic kidney disease, unspecified). The official index lists 8 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on N18.9.
It is also searched as chronic renal disease.
Within N18, choose N18.9 (Chronic kidney disease, unspecified) only when documentation doesn't support a more specific option: chronic kidney disease, stage 1 (N18.1), chronic kidney disease, stage 2 (mild) (N18.2), chronic kidney disease, stage 3 (moderate) (N18.3), chronic kidney disease, stage 4 (severe) (N18.4), chronic kidney disease, stage 5 (N18.5) and end stage renal disease (N18.6).
Code first any associated: diabetic chronic kidney disease (E08.22, E09.22, E10.22, E11.22, E13.22) and hypertensive chronic kidney disease (I12.-, I13.-).
Use an additional code, if applicable, to identify: associated cachexia (E88.A) and kidney transplant status (Z94.0).
Related CKD codes
- N18.1 Chronic kidney disease, stage 1
- N18.2 Chronic kidney disease, stage 2 (mild)
- N18.30 Chronic kidney disease, stage 3 unspecified
- N18.31 Chronic kidney disease, stage 3a
- N18.32 Chronic kidney disease, stage 3b
- N18.4 Chronic kidney disease, stage 4 (severe)
- N18.5 Chronic kidney disease, stage 5
- N18.6 End stage renal disease
Common questions about CKD ICD-10 codes
What is the ICD-10 code for CKD?
- N18.9 — Chronic kidney disease, unspecified. More specific codes apply when the documentation supports them: N18.1, N18.2, N18.30, N18.31 and others below.
What is the ICD-10 code for chronic kidney disease, stage 1?
- N18.1 — Chronic kidney disease, stage 1.
What is the ICD-10 code for chronic kidney disease, stage 2 (mild)?
- N18.2 — Chronic kidney disease, stage 2 (mild).
What is the ICD-10 code for chronic kidney disease, stage 3 unspecified?
- N18.30 — Chronic kidney disease, stage 3 unspecified.
What is the ICD-10 code for chronic kidney disease, stage 3a?
- N18.31 — Chronic kidney disease, stage 3a.
What is the ICD-10 code for chronic kidney disease, stage 3b?
- N18.32 — Chronic kidney disease, stage 3b.
What is the ICD-10 code for chronic kidney disease, stage 4 (severe)?
- N18.4 — Chronic kidney disease, stage 4 (severe).
Is N18.9 billable?
- Yes. N18.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N18.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N18.9 as a principal diagnosis.
Is N18.9 a CC or MCC?
- No. N18.9 is neither a CC nor an MCC under MS-DRG v44.0.