U.S. ICD-10-CM · FY 2027

N18 ICD-10-CM Code: Chronic kidney disease (CKD)

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

N18

Chronic kidney disease (CKD)

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where N18 sits

  1. 1

    Chapter 14

    Diseases of the genitourinary system (N00-N99)

  2. 2

    Section

    Acute kidney failure and chronic kidney disease (N17-N19)

  3. 3

    Category N18

    Chronic kidney disease (CKD)

  4. 4

    Code N18

    Chronic kidney disease (CKD)

More specific choices

Codes under N18

N18 is a non-billable category. Choose the child code that best matches the documented diagnosis.

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

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for N18.

Code first

  • any associated:
  • diabetic chronic kidney disease (E08.22, E09.22, E10.22, E11.22, E13.22)
  • hypertensive chronic kidney disease (I12.-, I13.-)

Use additional code

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

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for N18.

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for N18.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code N18 mean?

N18 is the FY 2027 U.S. ICD-10-CM code for “Chronic kidney disease (CKD).”

Is N18 a billable or specific ICD-10-CM code?

No. N18 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is N18 located in ICD-10-CM?

N18 is listed in Chapter 14, Diseases of the genitourinary system (N00-N99), within Acute kidney failure and chronic kidney disease (N17-N19) (N17–N19), under category N18, Chronic kidney disease (CKD).

What coding notes are listed for N18?

No inclusion terms are listed for N18 in this reference record. Code-first instructions: any associated:; diabetic chronic kidney disease (E08.22, E09.22, E10.22, E11.22, E13.22); hypertensive chronic kidney disease (I12.-, I13.-). Additional-code instructions: code, if applicable, to identify:; associated cachexia (E88.A); kidney transplant status (Z94.0). No Excludes1 note is listed. No Excludes2 note is listed.

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