What kind of medical practitioner can sign off on a Disability Tax Credit (DTC) form?

The following medical practitioners can sign-off on a Disability Tax Credit form:

• Medical doctor: All impairments
• Registered nurses (RN): All impairments
• Optometrist: Vision
• Audiologist: Hearing
• Occupational therapist: Walking, feeding, dressing
• Physiotherapist: Walking
• Psychologist: Mental Function
• Speech pathologist: Speaking