| Ontario Addiction Treatment Centres, Alliston Office | New Tecumseth |
| Ontario Addiction Treatment Centres, Bracebridge | Bracebridge |
| Ontario Addiction Treatment Centres, Collingwood Clinic | Collingwood |
| Ontario Addiction Treatment Centres, Huntsville | Huntsville |
| Ontario Addiction Treatment Centres, Lindsay Clinic | Kawartha Lakes |
| Ontario Addiction Treatment Centres, Owen Sound | Owen Sound |
| Ontario Addiction Treatment Centres, Parry Sound Clinic | Parry Sound |
| Ontario Addiction Treatment Centres, Peterborough Clinic | Peterborough |
| Ontario Addiction Treatment Centres, Peterborough Clinic | Peterborough |
| Ontario Addiction Treatment Centres, Port Hope Clinic | Port Hope (Municipality of) |