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HomeICD-10 CodesN18
ICD-10-CM
Non-billable

N18

Classification
Category:Diseases of the genitourinary system
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Coding Guidance
N18 should not be used for reimbursement purposes as there are more specific codes below it that contain a greater level of detail.
Excludes 2
From N00-N99
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Use Additional Code
Z94.0
code to identify kidney transplant status, if applicable

More Specific Codes

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

External Resources

2025 ICD-10 guidelines from CMS.gov