DB33.0

ICD-11 MMS 2026-01

Primary ulcer of colon

Description

A condition with single or multiple ulcers (mucosal defect) develops in the rectum or colon. Ulcers of the colon can cause bleeding with straining in people with chronic constipation.

Index terms

  • Primary ulcer of colon
  • Simple ulcer of colon
  • Rectal ulcer, not elsewhere classified
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  • rectal ulcer NEC
  • Solitary rectal ulcer syndrome
  • Ulcer in Behcet disease

Inclusions

  • Simple ulcer of colon

Exclusions from above levels

  • http://id.who.int/icd/entity/588616678 – Gastroenteritis or colitis of infectious origin
  • http://id.who.int/icd/entity/598093212 – Inflammatory bowel diseases
  • 01 – Certain infectious or parasitic diseases
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  • 02 – Neoplasms
  • 05 – Endocrine, nutritional or metabolic diseases
  • 06 – Mental, behavioural or neurodevelopmental disorders
  • 18 – Complications of pregnancy, childbirth and the puerperium
  • 22 – Injury, poisoning or certain other consequences of external causes

Sibling codes

  • DB33.1 – Microscopic colitis
  • DB33.2 – Allergic or dietetic colitis
  • DB33.3 – Diversion colitis
  • DB33.4 – Colitis or proctitis due to external causes
  • DB33.Y – Other specified noninfectious colitis or proctitis
  • DB33.Z – Noninfectious colitis or proctitis, unspecified

Foundation entity

Primary ulcer of colon – http://id.who.int/icd/entity/171433417

Allowed postcoordination axes

Part of: DB33: Certain noninfectious colitis or proctitis › 13: Diseases of the digestive system