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N18Non-billableSave

N18 - Chronic kidney disease (CKD)

ICD-10-CM Chapter 14: Diseases of the genitourinary system · N17-N19 Acute kidney failure and chronic kidney disease (N17-N19) · Top-level category · FY2027

Coding Guidance

N18 is a non-billable heading. Report one of the 7 more specific codes below.

Includes, Excludes and Coding Notes

Use Additional CodeFrom N18

Add a secondary code to identify the associated condition or cause when it is documented.

  • code, if applicable, to identify:
  • associated cachexia (E88.A)
  • kidney transplant status (Z94.0)
Code FirstFrom N18

Sequence the underlying condition before this code.

  • any associated:
  • diabetic chronic kidney disease (E08.22, E09.22, E10.22, E11.22, E13.22)
  • hypertensive chronic kidney disease (I12.-, I13.-)
Excludes 2 — Not Included HereFrom N17-N19 Acute kidney failure and chronic kidney disease (N17-N19)

Not part of this code; report both codes when the patient has both conditions.

  • congenital renal failure (P96.0)
  • drug- and heavy-metal-induced tubulo-interstitial and tubular conditions (N14.-)
  • extrarenal uremia (R39.2)
  • hemolytic-uremic syndrome (D59.3-)
  • hepatorenal syndrome (K76.7)
  • postpartum hepatorenal syndrome (O90.41)
  • posttraumatic renal failure (T79.5)
  • prerenal uremia (R39.2)
  • renal failure complicating abortion or ectopic or molar pregnancy (O00-O07, O08.4)
  • renal failure following labor and delivery (O90.41)
  • renal failure postprocedural (N99.0)
Excludes 2 — Not Included HereFrom Chapter N00-N99

Not part of this code; report both codes when the patient has both conditions.

  • 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)

More Specific Codes (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→

Related condition guides

Documentation requirements, coding pitfalls and FAQs for conditions coded with N18.