K64.31 ICD-10-CA code: Fourth degree haemorrhoids, complicated
K64.31 is the ICD-10-CA code for “Fourth degree haemorrhoids, complicated” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
K64.31Fourth degree haemorrhoids, complicated
Short description: Fourth degree haemorrhoids complicated
ICD-10-CA · Canada · Also written K6431
Index terms
Entries in CIHI’s alphabetical index that lead to K64.31. Searching the index by the condition the note names is how coders reach this code.
- Hemorrhoids (bleeding) (without mention of degree), internal, 4th degree (grade/stage IV) (with prolapse that cannot be manually replaced), complicated
- Hemorrhoids (bleeding) (without mention of degree), 4th degree (grade/stage IV) (with prolapse that cannot be manually replaced) (uncomplicated), complicated
Notes for K64.31
As CIHI prints them, with any note K64.31 takes from the headings above it.
Includes
- Grade/stage IV haemorrhoidshaemorrhoids (bleeding) with prolapsed tissue that cannot be manually replacedFrom K64.3 Fourth degree haemorrhoids
- PilesFrom K64 Haemorrhoids and perianal venous thrombosis
Excludes
Conditions classified elsewhere.
- Complicating:• childbirth and the puerperium (O87.2-)• pregnancy (O22.4-)From K64 Haemorrhoids and perianal venous thrombosis
- Certain:• conditions originating in the perinatal period (P00-P96)• 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 11: Diseases of the digestive system (K00-K93)
Note
- Haemorrhoids showing signs of bleeding and/or prolapse only, are designated as uncomplicated for classification purposes. Complicated haemorrhoids include those with additional signs of strangulation, thrombosis, necrosis and/or ulceration.From K64 Haemorrhoids and perianal venous thrombosis
Where K64.31 sits
- 1ChapterChapter 11: Diseases of the digestive system (K00-K93)
- 2Block K55-K64Other diseases of intestines
- 3Category K64Haemorrhoids and perianal venous thrombosis
- 4Subcategory K64.3Fourth degree haemorrhoids
- 5Valid code K64.31Fourth degree haemorrhoids, complicated
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 K64.31 mean?
K64.31 is the ICD-10-CA code for “Fourth degree haemorrhoids, complicated” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is K64.31 in ICD-10-CA?
K64.31 sits under K64.3 Fourth degree haemorrhoids, within K64 Haemorrhoids and perianal venous thrombosis, within K55-K64 Other diseases of intestines, within Chapter 11: Diseases of the digestive system (K00-K93).
What coding notes apply to K64.31?
ICD-10-CA lists Includes, Note, Excludes notes for K64.31, 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.