Diagnostic code
300 — Neurotic, stress-related and somatoform disorders (e.g. Phobic, anxiety, obsessive-compulsive, reactive and adjustment, dissociative, somatoform and other)
300 is an OHIP diagnostic code used on Ontario Health Insurance Plan claims. Neurotic, stress-related and somatoform disorders (e.g. Phobic, anxiety, obsessive-compulsive, reactive and adjustment, dissociative, somatoform and other).
- Code
- 300
- Description
- Neurotic, stress-related and somatoform disorders (e.g. Phobic, anxiety, obsessive-compulsive, reactive and adjustment, dissociative, somatoform and other)
Updated October 26, 2026
300 is the OHIP diagnostic code for anxiety and other stress-related disorders, including panic, phobias and obsessive-compulsive disorder.
Conditions billed under this code
- Anxiety
- Obsessive-compulsive disorder
- PTSD
What it covers
The Ministry's list describes 300 as 'Neurotic, stress-related and somatoform disorders', with examples: phobic, anxiety, obsessive-compulsive, reactive and adjustment, dissociative, somatoform and other. The wording was updated in March 2026 (INFOBulletin 260314).
In everyday terms it covers generalized anxiety, panic attacks, phobias, OCD, stress reactions, and disorders where the main problem is physical symptoms or health worry (somatoform disorders).
Close neighbours: 309 adjustment reaction, which the list also names separately; 311 depression; 296 mood disorders; 307 sleep-wake disorders such as insomnia; 905 occupational problems when the issue is a work situation rather than a disorder.
Billing notes
- Family physicians bill time spent on mental health care as K005, primary mental health care, per half-hour unit (A21).
- K005 isn't payable with another consultation or visit by the same physician on the same day unless the two services have clearly different diagnoses (A21, GP55).
Related codes: 309, 311, 296, 307, 905
Sources
- OHIP Diagnostic Codes (Ministry of Health, February 2026)
- INFOBulletin 260314: New diagnostic codes and updated descriptions (March 2026)
- Schedule of Benefits: Physician Services (effective July 1, 2026)
APEX flags claims whose diagnostic code does not fit the service billed before they come back rejected. See how APEX works · Pricing