| Arkansas Cancer Research Center at University of Arkansas for Medical Sciences | Little Rock | Arkansas | 72205 | - |
| Providence Saint Joseph Medical Center - Burbank | Burbank | California | 91505 | - |
| Moores UCSD Cancer Center | La Jolla | California | 92093-0658 | - |
| Kaiser Permanente Medical Office -Vandever Medical Office | San Diego | California | 92120 | - |
| Beebe Medical Center | Lewes | Delaware | 19958 | - |
| CCOP - Christiana Care Health Services | Newark | Delaware | 19713 | - |
| Rush-Copley Cancer Care Center | Aurora | Illinois | 60507 | - |
| University of Chicago Cancer Research Center | Chicago | Illinois | 60637-1470 | - |
| University of Illinois Cancer Center | Chicago | Illinois | 60612-7243 | - |
| Joliet Oncology-Hematology Associates, Limited - West | Joliet | Illinois | 60435 | - |
| Carle Cancer Center at Carle Foundation Hospital | Urbana | Illinois | 61801 | - |
| CCOP - Carle Cancer Center | Urbana | Illinois | 61801 | - |
| St. Francis Hospital and Health Centers - Beech Grove Campus | Beech Grove | Indiana | 46107 | - |
| Saint Anthony Memorial Health Centers | Michigan City | Indiana | 46360 | - |
| Reid Hospital & Health Care Services, Incorporated | Richmond | Indiana | 47374 | - |
| Tammy Walker Cancer Center at Salina Regional Health Center | Salina | Kansas | 67401 | - |
| Cotton-O'Neil Cancer Center | Topeka | Kansas | 66604 | - |
| St. Francis Comprehensive Cancer Center | Topeka | Kansas | 66606 | - |
| Central Maine Comprehensive Cancer Center at Central Maine Medical Center | Lewiston | Maine | 04240 | - |
| Union Hospital Cancer Program at Union Hospital | Elkton MD | Maryland | 21921 | - |
| Cancer Research Center at Boston Medical Center | Boston | Massachusetts | 02118 | - |
| Dana-Farber/Brigham and Women's Cancer Center | Boston | Massachusetts | 02115 | - |
| Dana-Farber/Harvard Cancer Center at Dana Farber Cancer Institute | Boston | Massachusetts | 02115 | - |
| Bronson Methodist Hospital | Kalamazoo | Michigan | 49007 | - |
| West Michigan Cancer Center | Kalamazoo | Michigan | 49007-3731 | - |
| Borgess Medical Center | Kalamazooaa | Michigan | 49001 | - |
| 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 | - |
| Billings Clinic Cancer Center | Billings | Montana | 59107-5100 | - |
| 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 | - |
| Great Falls Clinic - Main Facility | 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 | - |
| Methodist Estabrook Cancer Center | Omaha | Nebraska | 68114 | - |
| Kingsbury Center for Cancer Care at Cheshire Medical Center | Keene | New Hampshire | 03431 | - |
| Norris Cotton Cancer Center at Dartmouth - Hitchcock Medical Center | Lebanon | New Hampshire | 03756-0002 | - |
| Frisbie Memorial Hospital | Rochester | New Hampshire | 03867 | - |
| Cancer Institute of New Jersey at Cooper - Voorhees | Voorhees Township | New Jersey | 08043 | - |
| Charles R. Wood Cancer Center at Glens Falls Hospital | Glens Falls | New York | 12801 | - |
| New York Weill Cornell Cancer Center at Cornell University | New York | New York | 10021 | - |
| Stony Brook University Cancer Center | Stony Brook | New York | 11794-8174 | - |
| Our Lady of Mercy Medical Center Comprehensive Cancer Center | The Bronx | New York | 10466 | - |
| Lineberger Comprehensive Cancer Center at University of North Carolina - Chapel Hill | Chapel Hill | North Carolina | 27599-7295 | - |
| Wayne Memorial Hospital, Incorporated | Goldsboro | North Carolina | 27534 | - |
| Wayne Radiation Oncology | Goldsboro | North Carolina | 27534 | - |
| Rutherford Hospital | Rutherfordton | North Carolina | 28139 | - |
| Wilson Medical Center | Wilson | North Carolina | 27893-3428 | - |
| Wake Forest University Comprehensive Cancer Center | Winston-Salem | North Carolina | 27157-1096 | - |
| Case Comprehensive Cancer Center | Cleveland | Ohio | 44106 | - |
| Arthur G. James Cancer Hospital and Solove Research Institute at Ohio State University | Columbus | Ohio | 43210-1240 | - |
| 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 | - |
| Blanchard Valley Medical Associates | Findlay | Ohio | 45840 | - |
| 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 | 45373-1300 | - |
| Ruth G. McMillan Cancer Center at Greene Memorial Hospital | Xenia | Ohio | 45385 | - |
| St. Luke's Cancer Network at St. Luke's Hospital | Bethlehem | Pennsylvania | 18015 | - |
| AnMed Cancer Center | Anderson | South Carolina | 29621 | - |
| CCOP - Upstate Carolina | Spartanburg | South Carolina | 29303 | - |
| Gibbs Regional Cancer Center at Spartanburg Regional Medical Center | Spartanburg | South Carolina | 29303 | - |
| Avera Cancer Institute | Sioux Falls | South Dakota | 57105 | - |
| Sioux Valley Hospital and University of South Dakota Medical Center | Sioux Falls | South Dakota | 57117-5039 | - |
| CCOP - Scott and White Hospital | Temple | Texas | 76508 | - |
| American Fork Hospital | American Fork | Utah | 84003 | - |
| Logan Regional Hospital | Logan | Utah | 84321 | - |
| Cottonwood Hospital Medical Center | Murray | Utah | 84107 | - |
| McKay-Dee Hospital Center | Ogden | Utah | 84403 | - |
| Utah Valley Regional Medical Center - Provo | Provo | Utah | 84604 | - |
| Latter Day Saints Hospital | Salt Lake City | Utah | 84143 | - |
| Utah Cancer Specialists at UCS Cancer Center | Salt Lake City | Utah | 84106 | - |
| Dixie Regional Medical Center - East Campus | St. George | Utah | 84770 | - |
| Mountainview Medical | Berlin Corners | Vermont | 05602 | - |
| Fletcher Allen Health Care - University Health Center Campus | Burlington | Vermont | 05401 | - |
| Virginia Commonwealth University Massey Cancer Center | Richmond | Virginia | 23298-0037 | - |
| Welch Cancer Center at Sheridan Memorial Hospital | Sheridan | Wyoming | 82801 | - |