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K59 ICD-10-CA category: Other functional intestinal disorders

K59 isn’t a code on its own. Choose one of the 7 codes beneath it, the one the documentation supports.

Official description

K59

Other functional intestinal disorders

ICD-10-CA · Canada

Codes in K59

K59 isn’t a code on its own. Open the code that matches what the note documents.

K59.0ConstipationK59.1Functional diarrhoeaK59.2Neurogenic bowel, not elsewhere classifiedK59.3Megacolon, not elsewhere classifiedK59.4Anal spasmK59.8Other specified functional intestinal disordersK59.9Functional intestinal disorder, unspecified

Notes for K59

As CIHI prints them, with any note K59 takes from the headings above it.

Excludes

Conditions classified elsewhere.

  • Change in bowel habit NOS (R19.4)functional disorders of stomach (K31.-)intestinal malabsorption (K90.-)psychogenic intestinal disorders (F45.3)
  • 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)

Where K59 sits

  1. 1ChapterChapter 11: Diseases of the digestive system (K00-K93)
  2. 2Block K55-K64Other diseases of intestines
  3. 3Category K59Other functional intestinal disorders

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.

See K59 in the CIHI source

Frequently asked questions

Is K59 a valid ICD-10-CA code?

No. K59 (Other functional intestinal disorders) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 7 codes; record the one the documentation supports.

Where is K59 in ICD-10-CA?

K59 sits under K55-K64 Other diseases of intestines, within Chapter 11: Diseases of the digestive system (K00-K93).

What coding notes apply to K59?

ICD-10-CA lists Excludes notes for K59, 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.

Codes beside K59

K55Vascular disorders of intestineK56Paralytic ileus and intestinal obstruction without herniaK57Diverticular disease of intestineK58Irritable bowel syndromeK60Fissure and fistula of anal and rectal regionsK61Abscess of anal and rectal regionsK62Other diseases of anus and rectumK63Other diseases of intestineK64Haemorrhoids and perianal venous thrombosis