How is diagnostic code 314 used in billing?

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). 313 and 315 are on the GP26 list for E078, the chronic disease assessment premium (+50%) that specialists in the listed specialties add to an office or out-patient clinic assessment; 314 is not (GP26).

< Diagnostic codes

Diagnostic code

314 — Attention deficit disorder and attention deficit hyperactivity disorder

Q: What is OHIP diagnostic code 314?

314 is the OHIP diagnostic code for attention deficit disorder (ADD) and attention deficit hyperactivity disorder (ADHD).

314 is an OHIP diagnostic code used on Ontario Health Insurance Plan claims. Attention deficit disorder and attention deficit hyperactivity disorder.

Code: 314
Description: Attention deficit disorder and attention deficit hyperactivity disorder

Updated October 26, 2026

314 is the OHIP diagnostic code for attention deficit disorder (ADD) and attention deficit hyperactivity disorder (ADHD).

Conditions billed under this code

ADHD

What it covers

The Ministry's list describes 314 as 'Attention deficit disorder and attention deficit hyperactivity disorder', under Mental and Behavioural Disorders. The wording was updated in March 2026 (INFOBulletin 260314). In ICD-9, the system the list is based on, 314 is 'hyperkinetic syndrome of childhood', the older term many code lists still show.

Use it for ADD and ADHD, with or without hyperactivity. The current wording names no age group.

Close neighbours: 313 behaviour disorders of childhood and adolescence, 315 specific developmental delays such as dyslexia, 299 autism, 319 intellectual disability, 300 anxiety.

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).
313 and 315 are on the GP26 list for E078, the chronic disease assessment premium (+50%) that specialists in the listed specialties add to an office or out-patient clinic assessment; 314 is not (GP26).

Related codes: 313, 315, 299, 319, 300

Sources

APEX flags claims whose diagnostic code does not fit the service billed before they come back rejected. See how APEX works · Pricing