N11.8 ICD-10-CA code: Other chronic tubulo-interstitial nephritis
N11.8 is the ICD-10-CA code for “Other chronic tubulo-interstitial nephritis” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
N11.8Other chronic tubulo-interstitial nephritis
Short description: Oth chr tubulointerstitial nephritis
ICD-10-CA · Canada · Also written N118
Index terms
Entries in CIHI’s alphabetical index that lead to N11.8. Searching the index by the condition the note names is how coders reach this code.
- Pyelonephritis, nonobstructive, chronic
- Pyelonephritis, chronic (with), specified NEC
- Pyelonephritis, chronic (with), nonobstructive
- Nephritis, nephritic, tubulo interstitial (in), chronic (infectious), specified NEC
- Nephritis, nephritic, tubulo interstitial (in), chronic (infectious), nonobstructive
Notes for N11.8
As CIHI prints them, with any note N11.8 takes from the headings above it.
Includes
- Nonobstructive chronic pyelonephritis NOS
- Chronic:• infectious interstitial nephritis• pyelitis• pyelonephritisFrom N11 Chronic tubulo-interstitial nephritis
- PyelonephritisFrom N10-N16 Renal tubulo-interstitial diseases
Use additional code
Add a code for this detail when the note documents it.
- Use additional code (B95-B97) to identify infectious agent.From N11 Chronic tubulo-interstitial nephritis
- Use additional code to identify associated chronic kidney disease (N18.-)From N10-N16 Renal tubulo-interstitial diseases
Excludes
Conditions classified elsewhere.
- Pyeloureteritis cystica (N28.84)From N10-N16 Renal tubulo-interstitial diseases
- Certain conditions originating in the perinatal period (P00-P96)certain infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 14: Diseases of the genitourinary system (N00-N99)
Where N11.8 sits
- 1ChapterChapter 14: Diseases of the genitourinary system (N00-N99)
- 2Block N10-N16Renal tubulo-interstitial diseases
- 3Category N11Chronic tubulo-interstitial nephritis
- 4Valid code N11.8Other chronic tubulo-interstitial nephritis
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code N11.8 mean?
N11.8 is the ICD-10-CA code for “Other chronic tubulo-interstitial nephritis” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is N11.8 in ICD-10-CA?
N11.8 sits under N11 Chronic tubulo-interstitial nephritis, within N10-N16 Renal tubulo-interstitial diseases, within Chapter 14: Diseases of the genitourinary system (N00-N99).
What coding notes apply to N11.8?
ICD-10-CA lists Includes, Use additional code, Excludes notes for N11.8, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.