K58.1 ICD-10-CA code: Irritable bowel syndrome with predominant diarrhoea [IBS-D]
K58.1 is the ICD-10-CA code for “Irritable bowel syndrome with predominant diarrhoea [IBS-D]” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
K58.1Irritable bowel syndrome with predominant diarrhoea [IBS-D]
Short description: Irritabl bow syndr w predom diarrh
ICD-10-CA · Canada · Also written K581
Index terms
Entries in CIHI’s alphabetical index that lead to K58.1. Searching the index by the condition the note names is how coders reach this code.
- Spasm(s), spastic, spasticity, colon, with diarrhea
- Colitis (acute) (catarrhal) (hemorrhagic), spastic, with diarrhea
- Syndrome, irritable, bowel (with), diarrhea (IBS-D) (predominant)
- Irritable, irritability, colon, with diarrhea (IBS-D) (predominant)
- Irritable, irritability, bowel (syndrome) (IBS), with, diarrhea (IBS-D) (predominant)
Notes for K58.1
As CIHI prints them, with any note K58.1 takes from the headings above it.
Includes
- Irritable colonFrom K58 Irritable bowel syndrome
Excludes
Conditions classified elsewhere.
- 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 K58.1 sits
- 1ChapterChapter 11: Diseases of the digestive system (K00-K93)
- 2Block K55-K64Other diseases of intestines
- 3Category K58Irritable bowel syndrome
- 4Valid code K58.1Irritable bowel syndrome with predominant diarrhoea [IBS-D]
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 K58.1 mean?
K58.1 is the ICD-10-CA code for “Irritable bowel syndrome with predominant diarrhoea [IBS-D]” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is K58.1 in ICD-10-CA?
K58.1 sits under K58 Irritable bowel syndrome, within K55-K64 Other diseases of intestines, within Chapter 11: Diseases of the digestive system (K00-K93).
What coding notes apply to K58.1?
ICD-10-CA lists Includes, Excludes notes for K58.1, 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.