ICD-10-CM>N00-N99>N10-N16>N11N11Chronic tubulo-interstitial nephritisNon-Billable/Non-SpecificIncludeschronic infectious interstitial nephritischronic pyelitischronic pyelonephritisUse Additionalcode (B95-B97), to identify infectious agent.CodesN11.0Nonobstructive reflux-associated chronic pyelonephritisN11.1Chronic obstructive pyelonephritisN11.8Other chronic tubulo-interstitial nephritisN11.9Chronic tubulo-interstitial nephritis, unspecified