| ADAPT Halton, Oakville - Head Office, Alcohol, Drug and Gambling Assessment, Prevention and Treatment Services | Oakville |
| ADAPT Halton, Community Justice Programs | Halton Region |
| ADAPT Halton, Concurrent Disorders Programs | Halton Region |
| ADAPT Halton, Youth Programs | Halton Region |
| Addiction Services Central Ontario, Aurora Main Office, Remote Single Session Counselling | Aurora |
| Associated Youth Services of Peel | Mississauga |
| Canadian Academy of Dental Health and Community Sciences - Division of the Canadian Academy of Dental Hygiene, Dental Hygiene Clinic | Mississauga |
| Canadian Cancer Society - Ontario Division, Smokers' Helpline | Toronto Downtown North |
| Centre for Addiction and Mental Health, Addiction Medicine Services and Specialized Clinics | Toronto |
| Halton & Mississauga RAAM Clinic, Burlington, Rapid Access Addiction Medicine (RAAM) | Burlington |
| Halton & Mississauga RAAM Clinic, Oakville - Cornwall Rd, Rapid Access Addiction Medicine (RAAM) | Oakville |
| Halton & Mississauga RAAM Clinic, Oakville - Kerr St, Rapid Access Addiction Medicine (RAAM) | Oakville |
| Halton & Mississauga RAAM Clinic, Georgetown, Rapid Access Addiction Medicine (RAAM) | Halton Hills |
| Halton & Mississauga RAAM Clinic, Milton, Rapid Access Addiction Medicine (RAAM) | Milton |
| Halton Healthcare, Oakville Trafalgar Memorial Hospital, Mental Health - Integrated Addiction Medicine Clinic | Oakville |
| Halton. Halton Region Public Health, Stop Smoking Clinics | Halton Region |
| Homewood Health Centre | Guelph |
| Hope Place Centres, Men's Residential Addiction Treatment | Halton Hills |
| Hope Place Centres, Community Based Addiction Treatment | Halton Hills |
| Hope Place Centres, Women's Residential Addiction Treatment | Halton Hills |
| Horizons Opioid Treatment Service, Methadone and Suboxone Clinic | Burlington |
| Hospital for Sick Children, Adolescent Medicine | Toronto |
| Lung Health Foundation | North York East |
| Métis Nation of Ontario, Brampton | Brampton |
| Milton Life Care, Addiction Services | Milton |
| Native Horizons Treatment Centre | New Credit |
| Ontario Addiction Treatment Centres, Methadone Maintenance Treatment | Oakville |
| Ontario. Ministry of Health, Smoking Cessation Program | Toronto Downtown Central |
| PCHS, PCHS Brampton Branch Office, PCHS Brampton | Brampton |
| PCHS, PCHS Mississauga | Mississauga |
| Rapid Addiction Treatment Centre, Medical Treatment and Counselling for Addictions | Clarkson |
| Renascent, Wright Centre | Toronto |
| St. Joseph's Healthcare Hamilton, Womankind Addiction Service | Hamilton |
| Trillium Health Partners, Credit Valley Hospital | Mississauga |
| Wellbeings Pain Management and Dependency Clinic | Burlington |
| William Osler Health System, Peel Memorial Centre for Integrated Health and Wellness | Brampton |
| Women's College Hospital, Substance Use Service | Toronto |
