N64.0 ICD-10-CA code: Fissure and fistula of nipple
N64.0 is the ICD-10-CA code for “Fissure and fistula of nipple” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
N64.0Fissure and fistula of nipple
ICD-10-CA · Canada · Also written N640
Index terms
Entries in CIHI’s alphabetical index that lead to N64.0. Searching the index by the condition the note names is how coders reach this code.
- Cracked nipple
- Fistula, nipple
- Fissure, fissured, nipple
Notes for N64.0
As CIHI prints them, with any note N64.0 takes from the headings above it.
Excludes
Conditions classified elsewhere.
- Disorders of breast associated with childbirth (O91-O92)From N60-N64 Disorders of breast
- 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 N64.0 sits
- 1ChapterChapter 14: Diseases of the genitourinary system (N00-N99)
- 2Block N60-N64Disorders of breast
- 3Category N64Other disorders of breast
- 4Valid code N64.0Fissure and fistula of nipple
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 N64.0 mean?
N64.0 is the ICD-10-CA code for “Fissure and fistula of nipple” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is N64.0 in ICD-10-CA?
N64.0 sits under N64 Other disorders of breast, within N60-N64 Disorders of breast, within Chapter 14: Diseases of the genitourinary system (N00-N99).
What coding notes apply to N64.0?
ICD-10-CA lists Excludes notes for N64.0, 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.