N26

ICD-10Non-billable category

Unspecified contracted kidney

Official ICD-10-CM descriptor (FY2026)

Unspecified contracted kidney

N26 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.

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

contracted kidney due to hypertension (I12.-)
diffuse sclerosing glomerulonephritis (N05.8.-)
hypertensive nephrosclerosis (arteriolar) (arteriosclerotic) (I12.-)
small kidney of unknown cause (N27.-)

More specific codes under N26

Where this code sits

Chapter: 14. Diseases of the genitourinary system (N00-N99)
Block: Other disorders of kidney and ureter (N25-N29)

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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.