Is N11 a billable code?
No. N11 is a header code that groups 4 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
N11: Chronic tubulo-interstitial nephritis
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
N11 groups related diagnoses under chronic tubulo-interstitial nephritis. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
N11 questions
What does N11 mean?
N11 is the ICD-10-CM code for Chronic tubulo-interstitial nephritis. It is in chapter 14, Diseases of the genitourinary system (N00-N99).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.