| Alaska Regional Hospital Cancer Center | Anchorage | Alaska | 99508 | - |
| Providence Cancer Center | Anchorage | Alaska | 99508 | - |
| Arizona Cancer Center at University of Arizona Health Sciences Center | Tucson | Arizona | 85724-5024 | - |
| Arkansas Cancer Research Center at University of Arkansas for Medical Sciences | Little Rock | Arkansas | 72205 | - |
| Providence Saint Joseph Medical Center - Burbank | Burbank | California | 91505 | - |
| North Bay Cancer Center | Fairfield | California | 94533 | - |
| Poudre Valley Hospital | Fort Collins | Colorado | 80524 | - |
| Broward General Medical Center Cancer Center | Fort Lauderdale | Florida | 33316 | - |
| M.D. Anderson Cancer Center at Orlando | Orlando | Florida | 32806 | - |
| Mountain States Tumor Institute at St. Luke's Regional Medical Center | Boise | Idaho | 83712 | - |
| Decatur Memorial Hospital Cancer Care Institute | Decatur | Illinois | 62526 | - |
| St. Francis Hospital and Health Centers - Beech Grove Campus | Beech Grove | Indiana | 46107 | - |
| Reid Hospital & Health Care Services | Richmond | Indiana | 47374 | - |
| Cancer Center of Kansas, PA - Chanute | Chanute | Kansas | 66720 | - |
| Cancer Center of Kansas, PA - Dodge City | Dodge City | Kansas | 67801 | - |
| Cancer Center of Kansas, PA - El Dorado | El Dorado | Kansas | 67042 | - |
| Kansas Masonic Cancer Research Institute at the University of Kansas Medical Center | Kansas City | Kansas | 66160-7357 | - |
| Cancer Center of Kansas, PA - Kingman | Kingman | Kansas | 67068 | - |
| Southwest Medical Center | Liberal | Kansas | 67901 | - |
| Cancer Center of Kansas, PA - Newton | Newton | Kansas | 67114 | - |
| Olathe Cancer Center | Olathe | Kansas | 66061 | - |
| Cancer Center of Kansas, PA - Parsons | Parsons | Kansas | 67357 | - |
| Cancer Center of Kansas, PA - Pratt | Pratt | Kansas | 67124 | - |
| Cancer Center of Kansas, PA - Salina | Salina | Kansas | 67042 | - |
| Tammy Walker Cancer Center at Salina Regional Health Center | Salina | Kansas | 67401 | - |
| Cotton-O'Neil Cancer Center | Topeka | Kansas | 66606 | - |
| St. Francis Comprehensive Cancer Center | Topeka | Kansas | 66606 | - |
| Cancer Center of Kansas, PA - Wellington | Wellington | Kansas | 67152 | - |
| Associates in Womens Health, PA - North Review | Wichita | Kansas | 67203 | - |
| Cancer Center of Kansas, PA - Medical Arts Tower | Wichita | Kansas | 67208 | - |
| Cancer Center of Kansas, PA - Wichita | Wichita | Kansas | 67214 | - |
| CCOP - Wichita | Wichita | Kansas | 67214 | - |
| Via Christi Cancer Center at Via Christi Regional Medical Center | Wichita | Kansas | 67214 | - |
| Cancer Center of Kansas, PA - Winfield | Winfield | Kansas | 67156 | - |
| Boston University Cancer Research Center | Boston | Massachusetts | 02118 | - |
| University of Michigan Comprehensive Cancer Center | Ann Arbor | Michigan | 48109-0942 | - |
| Battle Creek Health System Cancer Care Center | Battle Creek | Michigan | 49017 | - |
| Mecosta County Medical Center | Big Rapids | Michigan | 49307 | - |
| Butterworth Hospital at Spectrum Health | Grand Rapids | Michigan | 49503 | - |
| CCOP - Grand Rapids | Grand Rapids | Michigan | 49503 | - |
| Lacks Cancer Center at Saint Mary's Health Care | Grand Rapids | Michigan | 49503 | - |
| Metro Health Hospital | Grand Rapids | Michigan | 49506 | - |
| Holland Community Hospital | Holland | Michigan | 49423 | - |
| Breslin Cancer Center at Ingham Regional Medical Center | Lansing | Michigan | 48910 | - |
| Hackley Hospital | Muskegon | Michigan | 49442 | - |
| Munson Medical Center | Traverse City | Michigan | 49684 | - |
| University of Mississippi Cancer Clinic | Jackson | Mississippi | 39216 | - |
| CCOP - Kansas City | Kansas City | Missouri | 64131 | - |
| CCOP - Cancer Research for the Ozarks | Springfield | Missouri | 65802 | - |
| Hulston Cancer Center at Cox Medical Center South | Springfield | Missouri | 65807 | - |
| St. John's Regional Health Center | Springfield | Missouri | 65804 | - |
| Billings Clinic - Downtown | Billings | Montana | 59107-7000 | - |
| CCOP - Montana Cancer Consortium | Billings | Montana | 59101 | - |
| Hematology-Oncology Centers of the Northern Rockies - Billings | Billings | Montana | 59101 | - |
| Northern Rockies Radiation Oncology Center | Billings | Montana | 59101 | - |
| St. Vincent Healthcare Cancer Care Services | Billings | Montana | 59101 | - |
| Bozeman Deaconess Cancer Center | Bozeman | Montana | 59715 | - |
| St. James Healthcare Cancer Care | Butte | Montana | 59701 | - |
| - | Great Falls | Montana | 59405 | - |
| Big Sky Oncology | Great Falls | Montana | 59405-5309 | - |
| Great Falls Clinic - Main Facility | Great Falls | Montana | 59405 | - |
| Sletten Cancer Institute at Benefis Healthcare | Great Falls | Montana | 59405 | - |
| St. Peter's Hospital | Helena | Montana | 59601 | - |
| Glacier Oncology, PLLC | Kalispell | Montana | 59901 | - |
| Kalispell Medical Oncology at KRMC | Kalispell | Montana | 59901 | - |
| Kalispell Regional Medical Center | Kalispell | Montana | 59901 | - |
| Community Medical Center | Missoula | Montana | 59801 | - |
| Guardian Oncology and Center for Wellness | Missoula | Montana | 59804 | - |
| Montana Cancer Center at St. Patrick Hospital and Health Sciences Center | Missoula | Montana | 59807 | - |
| Montana Cancer Specialists at Montana Cancer Center | Missoula | Montana | 59807-7877 | - |
| Good Samaritan Cancer Center at Good Samaritan Hospital | Kearney | Nebraska | 68848-1990 | - |
| Adirondack Cancer Care - Glens Falls | Glens Falls | New York | 12801 | - |
| Tucker Center for Cancer Care at Orange Regional Medical Center | Middletown | New York | 10940-4199 | - |
| Interlakes Oncology/Hematology PC | Rochester | New York | 14623 | - |
| James P. Wilmot Cancer Center at University of Rochester Medical Center | Rochester | New York | 14642 | - |
| Blumenthal Cancer Center at Carolinas Medical Center | Charlotte | North Carolina | 28232-2861 | - |
| Wayne Memorial Hospital, Incorporated | Goldsboro | North Carolina | 27534 | - |
| Pardee Memorial Hospital | Hendersonville | North Carolina | 28791 | - |
| Rutherford Hospital | Rutherfordton | North Carolina | 28139 | - |
| Mary Rutan Hospital | Bellefontaine | Ohio | 43311 | - |
| Adena Regional Medical Center | Chillicothe | Ohio | 45601 | - |
| Charles M. Barrett Cancer Center at University Hospital | Cincinnati | Ohio | 45267 | - |
| CCOP - Columbus | Columbus | Ohio | 43215 | - |
| Doctors Hospital at Ohio Health | Columbus | Ohio | 43228 | - |
| Grant Medical Center Cancer Care | Columbus | Ohio | 43215 | - |
| Mount Carmel Health - West Hospital | Columbus | Ohio | 43222 | - |
| Riverside Methodist Hospital Cancer Care | Columbus | Ohio | 43214-3998 | - |
| 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 | - |
| Grady Memorial Hospital | Delaware | Ohio | 43015 | - |
| Blanchard Valley Medical Associates | Findlay | Ohio | 45840 | - |
| Middletown Regional Hospital | Franklin | Ohio | 45005-1066 | - |
| Charles F. Kettering Memorial Hospital | Kettering | Ohio | 45429 | - |
| Fairfield Medical Center | Lancaster | Ohio | 43130 | - |
| Strecker Cancer Center at Marietta Memorial Hospital | Marietta | Ohio | 45750 | - |
| Licking Memorial Cancer Care Program at Licking Memorial Hospital | Newark | Ohio | 43055 | - |
| Community Hospital of Springfield and Clark County | Springfield | Ohio | 45505 | - |
| Mercy Medical Center | Springfield | Ohio | 45504 | - |
| UVMC Cancer Care Center at Upper Valley Medical Center | Troy | Ohio | 45373-1300 | - |
| Mount Carmel St. Ann's Cancer Center | Westerville | Ohio | 43081 | - |
| Ruth G. McMillan Cancer Center at Greene Memorial Hospital | Xenia | Ohio | 45385 | - |
| Genesis - Good Samaritan Hospital | Zanesville | Ohio | 43701 | - |
| Legacy Mount Hood Medical Center | Gresham | Oregon | 97030 | - |
| Providence Milwaukie Hospital | Milwaukie | Oregon | 97222 | - |
| Adventist Medical Center | Portland | Oregon | 97216 | - |
| CCOP - Columbia River Oncology Program | Portland | Oregon | 97225 | - |
| Legacy Emanuel Hospital and Health Center and Children's Hospital | Portland | Oregon | 97227 | - |
| Legacy Good Samaritan Hospital & Comprehensive Cancer Center | Portland | Oregon | 97210 | - |
| Providence Cancer Center at Providence Portland Medical Center | Portland | Oregon | 97213-2967 | - |
| Providence St. Vincent Medical Center | Portland | Oregon | 97225 | - |
| Legacy Meridian Park Hospital | Tualatin | Oregon | 97062 | - |
| AnMed Cancer Center | Anderson | South Carolina | 29621 | - |
| Hollings Cancer Center at Medical University of South Carolina | Charleston | South Carolina | 29425 | - |
| CCOP - Upstate Carolina | Spartanburg | South Carolina | 29303 | - |
| Gibbs Regional Cancer Center at Spartanburg Regional Medical Center | Spartanburg | South Carolina | 29303 | - |
| Christine LaGuardia Phillips Cancer Center at Wellmont Holston Valley Medical Center | Kingsport | Tennessee | 37662 | - |
| CCOP - Scott and White Hospital | Temple | Texas | 76508 | - |
| American Fork Hospital | American Fork | Utah | 84003 | - |
| Sandra L. Maxwell Cancer Center | Cedar City | Utah | 84720 | - |
| Logan Regional Hospital | Logan | Utah | 84321 | - |
| Cottonwood Hospital Medical Center | Murray | Utah | 84107 | - |
| Jon and Karen Huntsman Cancer Center at Intermountain Medical Center | Murray | Utah | 84157 | - |
| Val and Ann Browning Cancer Center at McKay-Dee Hospital Center | Ogden | Utah | 84403 | - |
| Utah Valley Regional Medical Center - Provo | Provo | Utah | 84604 | - |
| LDS Hospital | Salt Lake City | Utah | 84103 | - |
| Utah Cancer Specialists at UCS Cancer Center | Salt Lake City | Utah | 84106 | - |
| Dixie Regional Medical Center - East Campus | St. George | Utah | 84770 | - |
| Danville Regional Medical Center | Danville | Virginia | 24541 | - |
| Southwest Virginia Regional Cancer Center at Wellmonth Health | Norton | Virginia | 24273 | - |
| St. Joseph Cancer Center | Bellingham | Washington | 98225 | - |
| Olympic Hematology and Oncology | Bremerton | Washington | 98310 | - |
| Columbia Basin Hematology | Kennewick | Washington | 99336 | - |
| Fred Hutchinson Cancer Research Center | Seattle | Washington | 98104 | - |
| Group Health Central Hospital | Seattle | Washington | 98112 | - |
| Harborview Medical Center | Seattle | Washington | 98104 | - |
| Minor and James Medical, PLLC | Seattle | Washington | 98104 | - |
| Polyclinic First Hill | Seattle | Washington | 98122 | - |
| Swedish Cancer Institute at Swedish Medical Center - First Hill Campus | Seattle | Washington | 98122-4307 | - |
| University Cancer Center at University of Washington Medical Center | Seattle | Washington | 98195-6043 | - |
| Cancer Care Northwest - Spokane South | Spokane | Washington | 99202 | - |
| Southwest Washington Medical Center Cancer Center | Vancouver | Washington | 98668 | - |
| Wenatchee Valley Medical Center | Wenatchee | Washington | 98801-2028 | - |
| Welch Cancer Center at Sheridan Memorial Hospital | Sheridan | Wyoming | 82801 | - |