| CCOP - Scottsdale Oncology Program | Scottsdale | Arizona | 85259-5404 | - |
| Cancer Center and Beckman Research Institute, City of Hope | Duarte | California | 91010-3000 | - |
| Veterans Affairs Medical Center - Palo Alto | Palo Alto | California | 94304 | - |
| Stanford University Medical Center | Stanford | California | 94305-5408 | - |
| CCOP - Colorado Cancer Research Program, Inc. | Denver | Colorado | 80209-5031 | - |
| CCOP - Christiana Care Health Services | Wilmington | Delaware | 19899 | - |
| MBCCOP-Howard University Cancer Center | Washington D.C. | District of Columbia | 20060 | - |
| Walter Reed Army Medical Center | Washington D.C. | District of Columbia | 20307-5000 | - |
| Veterans Affairs Medical Center - Gainsville | Gainesville | Florida | 32608-1197 | - |
| Veterans Affairs Medical Center - Miami | Miami | Florida | 33125 | - |
| H. Lee Moffitt Cancer Center and Research Institute | Tampa | Florida | 33612-9497 | - |
| Veterans Affairs Medical Center - Tampa (Haley) | Tampa | Florida | 33612 | - |
| Emory University Hospital - Atlanta | Atlanta | Georgia | 30322 | - |
| Veterans Affairs Medical Center - Atlanta (Decatur) | Decatur | Georgia | 30033 | - |
| Robert H. Lurie Comprehensive Cancer Center, Northwestern University | Chicago | Illinois | 60611-3013 | - |
| Veterans Affairs Medical Center - Lakeside Chicago | Chicago | Illinois | 60611 | - |
| CCOP - Central Illinois | Decatur | Illinois | 62526 | - |
| CCOP - Evanston | Evanston | Illinois | 60201 | - |
| CCOP - Illinois Oncology Research Association | Peoria | Illinois | 61602 | - |
| CCOP - Carle Cancer Center | Urbana | Illinois | 61801 | - |
| Indiana University Cancer Center | Indianapolis | Indiana | 46202-5289 | - |
| Veterans Affairs Medical Center - Indianapolis (Roudebush) | Indianapolis | Indiana | 46202 | - |
| CCOP - Cedar Rapids Oncology Project | Cedar Rapids | Iowa | 52403-1206 | - |
| CCOP - Iowa Oncology Research Association | Des Moines | Iowa | 50309-1016 | - |
| Holden Comprehensive Cancer Center at The University of Iowa | Iowa City | Iowa | 52242-1009 | - |
| Veterans Affairs Medical Center - Wichita | Wichita | Kansas | 67218 | - |
| CCOP - Ochsner | New Orleans | Louisiana | 70121 | - |
| MBCCOP - LSU Health Sciences Center | New Orleans | Louisiana | 70112 | - |
| Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins | Baltimore | Maryland | 21231-2410 | - |
| Beth Israel Deaconess Medical Center | Boston | Massachusetts | 02215 | - |
| New England Medical Center Hospital | Boston | Massachusetts | 02111 | - |
| CCOP - Ann Arbor Regional | Ann Arbor | Michigan | 48106 | - |
| CCOP - Kalamazoo | Kalamazoo | Michigan | 49007-3731 | - |
| CCOP - Duluth | Duluth | Minnesota | 55805 | - |
| University of Minnesota Cancer Center | Minneapolis | Minnesota | 55455 | - |
| Veterans Affairs Medical Center - Minneapolis | Minneapolis | Minnesota | 55417 | - |
| Mayo Clinic Cancer Center | Rochester | Minnesota | 55905 | - |
| CCOP - Metro-Minnesota | Saint Louis Park | Minnesota | 55416 | - |
| CCOP - Missouri Valley Cancer Consortium | Omaha | Nebraska | 68131 | - |
| Veterans Affairs Medical Center - Omaha | Omaha | Nebraska | 68105 | - |
| CCOP - Southern Nevada Cancer Research Foundation | Las Vegas | Nevada | 89106 | - |
| Veterans Affairs Medical Center - East Orange | East Orange | New Jersey | 07018-1095 | - |
| CCOP - Northern New Jersey | Hackensack | New Jersey | 07601 | - |
| Cancer Institute of New Jersey | New Brunswick | New Jersey | 08901 | - |
| Veterans Affairs Medical Center - Albany | Albany | New York | 12208 | - |
| Veterans Affairs Medical Center - Brooklyn | Brooklyn | New York | 11209 | - |
| NYU School of Medicine's Kaplan Comprehensive Cancer Center | New York | New York | 10016 | - |
| Veterans Affairs Medical Center - New York | New York | New York | 10010 | - |
| University of Rochester Cancer Center | Rochester | New York | 14642 | - |
| Albert Einstein Comprehensive Cancer Center | The Bronx | New York | 10461 | - |
| MBCCOP-Our Lady of Mercy Cancer Center | The Bronx | New York | 10466 | - |
| CCOP - Merit Care Hospital | Fargo | North Dakota | 58122 | - |
| Cleveland Clinic Taussig Cancer Center | Cleveland | Ohio | 44195 | - |
| Ireland Cancer Center | Cleveland | Ohio | 44106-5065 | - |
| Veterans Affairs Medical Center - Cleveland | Cleveland | Ohio | 44106 | - |
| CCOP - Columbus | Columbus | Ohio | 43206 | - |
| CCOP - Toledo Community Hospital Oncology Program | Toledo | Ohio | 43623-3456 | - |
| CCOP - Sooner State | Tulsa | Oklahoma | 74136 | - |
| CCOP - Geisinger Clinic and Medical Center | Danville | Pennsylvania | 17822-2001 | - |
| Fox Chase Cancer Center | Philadelphia | Pennsylvania | 19111 | - |
| Hahnemann University Hospital | Philadelphia | Pennsylvania | 19102-1192 | - |
| University of Pennsylvania Cancer Center | Philadelphia | Pennsylvania | 19104-4283 | - |
| University of Pennsylvania Health Systems | Philadelphia | Pennsylvania | 19104-9104 | - |
| University of Pittsburgh Cancer Institute | Pittsburgh | Pennsylvania | 15213-3489 | - |
| Veterans Affairs Medical Center - Pittsburgh | Pittsburgh | Pennsylvania | 15240 | - |
| CCOP - MainLine Health | Wynnewood | Pennsylvania | 19096 | - |
| CCOP - Sioux Community Cancer Consortium | Sioux Falls | South Dakota | 57105-1080 | - |
| Vanderbilt-Ingram Cancer Center | Nashville | Tennessee | 37232-6838 | - |
| Veterans Affairs Medical Center - Nashville | Nashville | Tennessee | 37212 | - |
| University of Wisconsin Comprehensive Cancer Center | Madison | Wisconsin | 53792-6164 | - |
| Veterans Affairs Medical Center - Madison | Madison | Wisconsin | 53705 | - |
| CCOP - Marshfield Medical Research and Education Foundation | Marshfield | Wisconsin | 54449 | - |
| Medical College of Wisconsin | Milwaukee | Wisconsin | 53226 | - |
| Veterans Affairs Medical Center - Milwaukee (Zablocki) | Milwaukee | Wisconsin | 53295 | - |