N11.9Billable

Chronic tubulo-interstitial nephritis, unspecified

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

Related codes in category N11

N11Chronic tubulo-interstitial nephritisN11.0Nonobstructive reflux-associated chronic pyelonephritisYesN11.1Chronic obstructive pyelonephritisYesN11.8Other chronic tubulo-interstitial nephritisYes

Frequently asked questions

What is ICD-10 code N11.9?

N11.9 is an ICD-10-CM diagnosis code for Chronic tubulo-interstitial nephritis, unspecified.

Is N11.9 a billable code?

Yes. N11.9 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is N11.9 in?

N11.9 falls under Chapter 14: Diseases of the genitourinary system.

When did N11.9 become effective?

N11.9 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to N11.9?

N11.9 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.