Diagnostic code
564 — Other Diseases of Intestine and Peritoneum: Spastic colon, irritable colon, mucous colitis, constipation, encopresis
564 is an OHIP diagnostic code used on Ontario Health Insurance Plan claims. Other Diseases of Intestine and Peritoneum: Spastic colon, irritable colon, mucous colitis, constipation, encopresis.
- Code
- 564
- Description
- Other Diseases of Intestine and Peritoneum: Spastic colon, irritable colon, mucous colitis, constipation, encopresis
Updated October 26, 2026
564 is the OHIP diagnostic code for constipation and irritable bowel syndrome (IBS).
Conditions billed under this code
- Constipation
- IBS
What it covers
The Ministry lists 564 as 'Spastic colon, irritable colon, mucous colitis, constipation, encopresis' under Other Diseases of Intestine and Peritoneum. The wording was updated in March 2026 (INFOBulletin 260314).
Use it for constipation, IBS (which the list calls irritable or spastic colon) and encopresis (soiling in children).
Close neighbours: 560 bowel obstruction or impaction, 562 diverticular disease, 555 Crohn's disease, 556 ulcerative colitis, 009 diarrhea or gastroenteritis, 787 abdominal pain not yet diagnosed.
Related codes: 560, 562, 555, 556, 009, 787
Sources
- OHIP Diagnostic Codes (Ministry of Health, February 2026)
- INFOBulletin 260314: New diagnostic codes and updated descriptions (March 2026)
APEX flags claims whose diagnostic code does not fit the service billed before they come back rejected. See how APEX works · Pricing