Diagnostic code
297 — Delusional disorder and delirium
297 is an OHIP diagnostic code used on Ontario Health Insurance Plan claims. Delusional disorder and delirium.
- Code
- 297
- Description
- Delusional disorder and delirium
Updated October 26, 2026
297 is the OHIP diagnostic code for delirium and for delusional disorder.
Conditions billed under this code
- Delirium
What it covers
The Ministry lists 297 as 'Delusional disorder and delirium' under Mental and Behavioural Disorders. The wording was updated in March 2026 (INFOBulletin 260314).
Use it for delirium (an acute confusional state) and for delusional disorder.
Close neighbours: 291 delirium tremens and other alcohol-induced mental disorders, 292 drug-induced mental disorders, 290 dementia, 298 psychosis not yet diagnosed, 295 schizophrenia spectrum disorders.
Related codes: 291, 292, 290, 298, 295
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