N18

ICD-10Non-billable category

Chronic kidney disease (CKD)

Official ICD-10-CM descriptor (FY2026)

Chronic kidney disease (CKD)

N18 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

Code first

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.-)

Use additional code

Report an additional code to identify the associated condition.

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

More specific codes under N18

Where this code sits

Chapter: 14. Diseases of the genitourinary system (N00-N99)
Block: Acute kidney failure and chronic kidney disease (N17-N19)

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.