I Need Help Now Please note: Keystone is not an emergency service.If this is an emergency, call the Crisis Line at 1-877-470-5200ORgo to your nearest Emergency Department.Keystone Hours: Monday to Friday 8:30am – 4:30pmPLEASE CALL US AT:519-371-4773 or 1-800 567-2384If you would like to book an appointment with Keystone, please make a referral by clicking on the button below: Make a referral to Keystone