ICD-11 classes
13 Diseases of the digestive system
Diseases of large intestine
DB33 — Certain noninfectious colitis or proctitis
DB33.4 — Colitis or proctitis due to external causes
DB33.40 — Chemical colitis or proctitis

ICD-11 DB33.40 — Chemical colitis or proctitis

This refers to condition of inflammation of large intestine caused by chemical or toxic substances.

The diagnosis includes nothing.

The diagnosis excludes nothing.

It has no clarifying diagnoses.