| Arkansas Cancer Research Center at University of Arkansas for Medical Sciences | Little Rock | Arkansas | 72205 | - |
| University of California Davis Cancer Center | Davis | California | 95616 | - |
| Contra Costa Regional Medical Center | Martinez | California | 94553-3156 | - |
| St. Anthony Central Hospital | Denver | Colorado | 80204 | - |
| University of Colorado Cancer Center at University of Colorado Health Sciences Center | Denver | Colorado | 80217-3364 | - |
| Montrose Memorial Hospital Cancer Center | Montrose | Colorado | 81401 | - |
| St. Anthony North Hospital | Westminster | Colorado | 80030 | - |
| Exempla Lutheran Medical Center | Wheat Ridge | Colorado | 80033 | - |
| CCOP - Atlanta Regional | Atlanta | Georgia | 30342 | - |
| Northside Hospital Cancer Center | Atlanta | Georgia | 30342 | - |
| Piedmont Hospital | Atlanta | Georgia | 30309 | - |
| Saint Joseph's Hospital of Atlanta | Atlanta | Georgia | 30342 | - |
| WellStar Cobb Hospital | Austell | Georgia | 30106 | - |
| Charles B. Eberhart Cancer Center at DeKalb Medical Center | Decatur | Georgia | 30033 | - |
| Gwinnett Medical Center | Lawrenceville | Georgia | 30045 | - |
| Kennestone Cancer Center at Wellstar Kennestone Hospital | Marietta | Georgia | 30060 | - |
| Southern Regional Medical Center | Riverdale | Georgia | 30274 | - |
| Cardinal Bernardin Cancer Center at Loyola University Medical Center | Maywood | Illinois | 60153 | - |
| Regional Cancer Center at Memorial Medical Center | Springfield | Illinois | 62781-0001 | - |
| St. Francis Hospital and Health Centers | Beech Grove | Indiana | 46107 | - |
| McFarland Clinic, P.C. | Ames | Iowa | 50010 | - |
| Baton Rouge General Regional Cancer Center | Baton Rouge | Louisiana | 70806 | - |
| Mary Bird Perkins Cancer Center - Baton Rouge | Baton Rouge | Louisiana | 70809 | - |
| MBCCOP - LSU Health Sciences Center | New Orleans | Louisiana | 70112 | - |
| Medical Center of Louisiana - New Orleans | New Orleans | Louisiana | 70112 | - |
| University of Michigan Comprehensive Cancer Center | Ann Arbor | Michigan | 48109 | - |
| Battle Creek Health System Cancer Care Center | Battle Creek | Michigan | 49017 | - |
| Mecosta County General Hospital | Big Rapids | Michigan | 49307 | - |
| CCOP - Grand Rapids | Grand Rapids | Michigan | 49503 | - |
| Lacks Cancer Center at Saint Mary's Mercy Medical Center | Grand Rapids | Michigan | 49503 | - |
| Metropolitan Hospital | Grand Rapids | Michigan | 49506 | - |
| Spectrum Health Cancer Care - Butterworth Campus | Grand Rapids | Michigan | 49503 | - |
| Spectrum Health Hospital - Blodgett Campus | Grand Rapids | Michigan | 49506 | - |
| Holland Community Hospital | Holland | Michigan | 49423 | - |
| Hackley Hospital | Muskegon | Michigan | 49443 | - |
| Northern Michigan Hospital | Petoskey | Michigan | 49770 | - |
| Munson Medical Center | Traverse City | Michigan | 49684 | - |
| CCOP - Montana Cancer Consortium | Billings | Montana | 59101 | - |
| Deaconess Billings Clinic - Downtown | Billings | Montana | 59101 | - |
| Deaconess Billings Clinic Cancer Center | Billings | Montana | 59107 | - |
| Northern Rockies Radiation Oncology Center | Billings | Montana | 59101 | - |
| St. Vincent Healthcare | Billings | Montana | 59101 | - |
| Bozeman Deaconess Hospital | Bozeman | Montana | 59715 | - |
| St. James Community Hospital | Butte | Montana | 59701 | - |
| St. Peter's Hospital | Helena | Montana | 59601 | - |
| Kalispell Regional Medical Center | Kalispell | Montana | 59901 | - |
| Eastern Montana Cancer Center | Miles City | Montana | 59301 | - |
| Community Medical Center | Missoula | Montana | 59801 | - |
| Montana Cancer Center at St. Patrick Hospital and Health Sciences Center | Missoula | Montana | 59802 | - |
| Methodist Cancer Center at Methodist Hospital - Omaha | Omaha | Nebraska | 68114 | - |
| Blumenthal Cancer Center at Carolinas Medical Center | Charlotte | North Carolina | 28203 | - |
| Wayne Memorial Hospital, Incorporated | Goldsboro | North Carolina | 27534 | - |
| Wilson Medical Center | Wilson | North Carolina | 27893 | - |
| Cleveland Clinic Taussig Cancer Center | Cleveland | Ohio | 44195 | - |
| CCOP - Dayton | Dayton | Ohio | 45429 | - |
| David L. Rike Cancer Center at Miami Valley Hospital | Dayton | Ohio | 45409 | - |
| Good Samaritan Hospital | Dayton | Ohio | 45406 | - |
| Grandview Hospital | Dayton | Ohio | 45405 | - |
| Samaritan North Cancer Care Center | Dayton | Ohio | 45415 | - |
| Veterans Affairs Medical Center - Dayton | Dayton | Ohio | 45428 | - |
| Community Oncology Group - Independence | Independence | Ohio | 44131 | - |
| Charles F. Kettering Memorial Hospital | Kettering | Ohio | 45429 | - |
| Middletown Regional Hospital | Middletown | Ohio | 45044 | - |
| UVMC Cancer Care Center at Upper Valley Medical Center | Troy | Ohio | 45373 | - |
| Cleveland Clinic - Wooster | Wooster | Ohio | 44691 | - |
| Ruth G. McMillan Cancer Center at Greene Memorial Hospital | Xenia | Ohio | 45385 | - |
| Legacy Mount Hood Medical Center | Gresham | Oregon | 97030 | - |
| Providence Milwaukie Hospital | Milwaukie | Oregon | 97222 | - |
| Cancer Institute at Oregon Health and Science University | Portland | Oregon | 97239 | - |
| CCOP - Columbia River Oncology Program | Portland | Oregon | 97225 | - |
| Comprehensive Cancer Center at Legacy Good Samaritan Hospital & Medical Center | Portland | Oregon | 97210 | - |
| Institute of Oncology at Vilnius University | Portland | Oregon | 97227 | - |
| Providence Cancer Center at Providence Portland Medical Center | Portland | Oregon | 97213 | - |
| Providence St. Vincent Medical Center | Portland | Oregon | 97225 | - |
| Legacy Meridian Park Hospital | Tualatin | Oregon | 97062 | - |
| Danville Regional Medical Center | Danville | Virginia | 24541 | - |
| Auburn Regional Center for Cancer Care | Auburn | Washington | 98002 | - |
| St. Joseph Hospital Community Cancer Center | Bellingham | Washington | 98225 | - |
| Olympic Hematology and Oncology | Bremerton | Washington | 98310 | - |
| Regional Cancer Center at Providence Hospital | Centralia | Washington | 98531 | - |
| St. Francis Hospital | Federal Way | Washington | 98003 | - |
| Skagit Valley Hospital Cancer Care Center | Mount Vernon | Washington | 98273 | - |
| Capital Medical Center | Olympia | Washington | 98507 | - |
| Providence St. Peter Hospital Regional Cancer Center | Olympia | Washington | 95806 | - |
| Good Samaritan Cancer Center | Puyallup | Washington | 98372 | - |
| Fred Hutchinson Cancer Research Center | Seattle | Washington | 98104 | - |
| Group Health Central Hospital | Seattle | Washington | 98104 | - |
| Harborview Medical Center | Seattle | Washington | 98104 | - |
| Swedish Cancer Institute at Swedish Medical Center - First Hill Campus | Seattle | Washington | 98114 | - |
| University Cancer Center at University of Washington Medical Center | Seattle | Washington | 98195 | - |
| North Puget Oncology at United General Hospital | Sedro-Woolley | Washington | 98284 | - |
| Cancer Care Northwest - Spokane South | Spokane | Washington | 99202 | - |
| Allenmore Hospital | Tacoma | Washington | 98405 | - |
| CCOP - Northwest | Tacoma | Washington | 98405 | - |
| St. Clare Hospital | Tacoma | Washington | 98499 | - |
| St. Joseph Medical Center at Franciscan Health System | Tacoma | Washington | 98405 | - |
| Southwest Washington Medical Center Cancer Center | Vancouver | Washington | 98668 | - |
| Central Washington Hospital | Wenatchee | Washington | 98801 | - |
| Wenatchee Valley Clinic | Wenatchee | Washington | 98801 | - |
| Community Comprehensive Cancer Center at Camden-Clark Memorial Hospital | Parkersburg | West Virginia | 26101 | - |
| Welch Cancer Center | Sheridan | Wyoming | 82801 | - |