| Erie St. Clair Regional Cancer Program | Windsor Regional Cancer Centre | Windsor Regional Hospital | 2220 Kildare Road | Windsor | Ontario | N8W 2X3 | 519-253-5253 | 519-255-8670 |
| South West Regional Cancer Program | London Regional Cancer Program | London Health Sciences Centre | 790 Commissioners Road East | London | Ontario | N6A 4L6 | 519-685-8600 | 519-685-8611 |
| Waterloo Wellington Regional Cancer Program | Grand River Regional Cancer Centre | Grand River Hospital | 835 King Street West, P.O. Box 9056 | Kitchener | Ontario | N2G 1G3 | 519-749-4380 | 519-749-4274 |
| Hamilton Niagara Haldimand Brant Regional Cancer Program | Juravinski Cancer Centre | Hamilton Health Sciences | 699 Concession Street | Hamilton | Ontario | L8V 5C2 | 905-387-9495 | 905-575-6323 |
| Mississauga Halton Central West Regional Cancer Program | Carlo Fidani Peel Regional Cancer Centre | Trillium Health Partners - Credit Valley Site | 2200 Eglinton Avenue West | Mississauga | Ontario | L5M 2N1 | 905-813-1100 | 905-813-4024 |
| Toronto Central Regional Cancer Program | Odette Cancer Centre | Sunnybrook Health Sciences Centre | 2075 Bayview Avenue | Toronto | Ontario | M4N 3M5 | 416-480-5000 | 416-480-6002 |
| Toronto Central Regional Cancer Program | Princess Margaret Cancer Centre | University Health Network | 610 University Avenue, Suite 16-609 | Toronto | Ontario | M5G 2M9 | 416-946-4501 | 416-946-2038 |
| Central Regional Cancer Program | Stronach Regional Cancer Centre at Southlake | Southlake Regional Health Centre | 596 Davis Drive | Newmarket | Ontario | L3Y 2P9 | 905-895-4521 | 905-853-2220 |
| Central East Regional Cancer Program | R.S. McLaughlin Durham Regional Cancer Centre | Lakeridge Health | 1 Hospital Court | Oshawa | Ontario | L1G 2B9 | 905-576-8711 | 905-721-7778 |
| South East Regional Cancer Program | Cancer Centre of Southeastern Ontario | Kingston General Hospital | 25 King Street West | Kingston | Ontario | K7L 5P9 | 613-544-2630 | 613-544-4967 |
| Champlain Regional Cancer Program | The Ottawa Hospital Cancer Centre | The Ottawa Hospital | 501 Smyth Road | Ottawa | Ontario | K1H 8L6 | 613-737-7700 | 613-247-3503 |
| North Simcoe Muskoka Regional Cancer Program | Simcoe Muskoka Regional Cancer Centre | Royal Victoria Hospital | 201 Georgian Drive | Barrie | Ontario | L4M 6M2 | 705-728-9090 | 705-728-2408 |
| North East Regional Cancer Program | Northeast Cancer Centre | Health Sciences North/Horizon Santé - Nord | 41 Ramsey Lake Road | Sudbury | Ontario | P3E 5J1 | 705-522-6237 | 705-523-7112 |
| North West Regional Cancer Program | Regional Cancer Care Northwest | Thunder Bay Regional Health Sciences Centre | 980 Oliver Road | Thunder Bay | Ontario | P7B 6V4 | 807-684-7200 | 807-684-5892 |
| Hamilton Niagara Haldimand Brant Regional Cancer Program | Walker Family Cancer Centre | Niagara Health Services | 1200 Fourth AvenueWalker Tower, 1st Floor | St. Catharines | Ontario | L2S 0A9 | 905-682-6451 | |
| North East Regional Cancer Program | Algoma District Cancer Program | Sault Area Hospital | 750 Great Northern Road | Sault Ste. Marie | Ontario | P6B 0A8 | 705-759-3434 | (705) 759-3815 |
| Central East Regional Cancer Program | Regional Cancer Care | Peterborough Regional Health Centre | 1 Hospital Drive | Peterborough | Ontario | K9J 7C6 | 705-740-8326 | 705-740-8125 |
