N18

Non-billable

Chronic kidney disease (CKD)

N18 is the ICD-10-CM code for Chronic kidney disease (CKD). It is a non-billable category code — use a more specific child code such as N18.1 for billing.

Status
Header (non-billable)
Chapter
N00-N99
Subcodes
7
Edition
FY2026

N00-N99 Diseases of the genitourinary system

Code first

Use additional code

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

Frequently asked questions

What is ICD-10 code N18?
N18 is the ICD-10-CM code for "Chronic kidney disease (CKD)". It falls under N00-N99 Diseases of the genitourinary system.
Is N18 a billable code?
No — N18 is a non-billable header code. Use a more specific child code (such as N18.1) for billing.
What are the subcodes of N18?
N18 has 7 more specific child codes, including N18.1, N18.2, N18.3.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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