N27

Non-billable

Small kidney of unknown cause

N27 is the ICD-10-CM code for Small kidney of unknown cause. It is a non-billable category code — use a more specific child code such as N27.0 for billing.

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

N00-N99 Diseases of the genitourinary system

Includes

  • oligonephronia

Frequently asked questions

What is ICD-10 code N27?
N27 is the ICD-10-CM code for "Small kidney of unknown cause". It falls under N00-N99 Diseases of the genitourinary system.
Is N27 a billable code?
No — N27 is a non-billable header code. Use a more specific child code (such as N27.0) for billing.
What are the subcodes of N27?
N27 has 3 more specific child codes, including N27.0, N27.1, N27.9.

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

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