N11 — ICD-10-CM Diagnosis Codes
- N11 Chronic tubulo-interstitial nephritis
- N11.0 Nonobstructive reflux-associated chronic pyelonephritis billable
- N11.1 Chronic obstructive pyelonephritis billable
- N11.8 Other chronic tubulo-interstitial nephritis billable
- N11.9 Chronic tubulo-interstitial nephritis, unspecified billable