N11Header code — not billable

Chronic tubulo-interstitial nephritis

Chapter
14. Diseases of the genitourinary system
Category
N11
Effective date
October 1, 2026

Related codes in category N11

N11.0Nonobstructive reflux-associated chronic pyelonephritisYesN11.1Chronic obstructive pyelonephritisYesN11.8Other chronic tubulo-interstitial nephritisYesN11.9Chronic tubulo-interstitial nephritis, unspecifiedYes

Frequently asked questions

What is ICD-10 code N11?

N11 is an ICD-10-CM diagnosis code for Chronic tubulo-interstitial nephritis.

Is N11 a billable code?

No. N11 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 N11 in?

N11 falls under Chapter 14: Diseases of the genitourinary system.

When did N11 become effective?

N11 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to N11?

N11 belongs to category N11, which includes 4 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.