All ICD10 Codes

N18

Non-Billable
ChapterN00–N99
Rankcategory
Official Description

Chronic kidney disease (CKD)

Use a more specific code (6 billable, 1 non-billable)
N18.1Chronic kidney disease, stage 1N18.2Chronic kidney disease, stage 2 (mild)N18.3Chronic kidney disease, stage 3 (moderate)has subcodesN18.4Chronic kidney disease, stage 4 (severe)N18.5Chronic kidney disease, stage 5N18.6End stage renal diseaseN18.9Chronic kidney disease, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 14: Diseases of the Genitourinary System (N00-N99).

CH14 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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)

N17-N19 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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)

Instructional Notes

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

Clinical Hierarchy

BillableHas subcodes
CH14Diseases of the genitourinary system (N00-N99)
N17-N19Acute kidney failure and chronic kidney disease (N17-N19)
N18Chronic kidney disease (CKD)Not billable
N18.1Chronic kidney disease, stage 1Billable
N18.2Chronic kidney disease, stage 2 (mild)Billable
N18.3Chronic kidney disease, stage 3 (moderate)Subcodes
N18.4Chronic kidney disease, stage 4 (severe)Billable
N18.5Chronic kidney disease, stage 5Billable
N18.6End stage renal diseaseBillable
N18.9Chronic kidney disease, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to N18:

blockN17-N19
Acute kidney failure and chronic kidney disease (N17-N19)
View context instructions
chapterCH14
Diseases of the genitourinary system (N00-N99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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