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N18

⚠ Non-billable (Header)

Chronic kidney disease (CKD)

Diseases of the genitourinary system (N00-N99)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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📋 Code Instructions

  • • code, if applicable, to identify:
  • • associated cachexia (E88.A)
  • • kidney transplant status (Z94.0)
  • • Code first: any associated:
  • • Code first: diabetic chronic kidney disease (E08.22, E09.22, E10.22, E11.22, E13.22)
  • • Code first: hypertensive chronic kidney disease (I12.-, I13.-)

Child Codes (7)

N18.1Chronic kidney disease, stage 1N18.2Chronic kidney disease, stage 2 (mild)N18.3Chronic kidney disease, stage 3 (moderate)N18.4Chronic kidney disease, stage 4 (severe)N18.5Chronic kidney disease, stage 5N18.6End stage renal diseaseN18.9Chronic kidney disease, unspecified

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Code Information

CodeN18
BillableNo — Header code
CategoryDiseases of the genitourinary system (N00-N99)
Excludes10 rule(s)
Excludes20 note(s)
Child codes7

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)