N27Header code — not billable
Small kidney of unknown cause
- Chapter
- 14. Diseases of the genitourinary system
- Category
- N27
- Effective date
- October 1, 2026
Related codes in category N27
Frequently asked questions
What is ICD-10 code N27?
N27 is an ICD-10-CM diagnosis code for Small kidney of unknown cause.
Is N27 a billable code?
No. N27 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is N27 in?
N27 falls under Chapter 14: Diseases of the genitourinary system.
When did N27 become effective?
N27 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to N27?
N27 belongs to category N27, which includes 3 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.