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N26

Non-billable

Unspecified contracted kidney

N26 is the ICD-10-CM code for Unspecified contracted kidney. It is a non-billable category code — use a more specific child code such as N26.1 for billing.

Status
Header (non-billable)
Chapter
N00-N99
Subcodes
3
Edition
FY2026

N00-N99 Diseases of the genitourinary system

What this means — in plain language

MedlinePlus · NIH

You have two kidneys, each about the size of your fist. They are near the middle of your back, just below the rib cage. Inside each kidney there are about a million tiny structures called nephrons. They filter your blood. They remove wastes and extra water, which become urine. The urine flows through tubes called ureters. It goes to your bladder, which stores the urine until you go to the bathroom. Most kidney…

Read more about Kidney Diseases at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

Excludes1 — not coded here

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

Frequently asked questions

What is ICD-10 code N26?
N26 is the ICD-10-CM code for "Unspecified contracted kidney". It falls under N00-N99 Diseases of the genitourinary system.
Is N26 a billable code?
No — N26 is a non-billable header code. Use a more specific child code (such as N26.1) for billing.
What are the subcodes of N26?
N26 has 3 more specific child codes, including N26.1, N26.2, N26.9.
What is excluded from N26?
Excludes1 (not coded here): contracted kidney due to hypertension (I12.-); diffuse sclerosing glomerulonephritis (N05.8.-); hypertensive nephrosclerosis (arteriolar) (arteriosclerotic) (I12.-); small kidney of unknown cause (N27.-).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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