| Mobile Infirmary Medical Center | Mobile | Alabama | 36652-2144 | - |
| Mayo Clinic Scottsdale | Scottsdale | Arizona | 85259 | - |
| Aurora Presbyterian Hospital | Aurora | Colorado | 80012 | - |
| Boulder Community Hospital | Boulder | Colorado | 80301-9019 | - |
| Penrose Cancer Center at Penrose Hospital | Colorado Springs | Colorado | 80933 | - |
| CCOP - Colorado Cancer Research Program, Incorporated | Denver | Colorado | 80224-2522 | - |
| Porter Adventist Hospital | Denver | Colorado | 80210 | - |
| Presbyterian - St. Luke's Medical Center | Denver | Colorado | 80218 | - |
| Rose Medical Center | Denver | Colorado | 80220 | - |
| St. Joseph Hospital | Denver | Colorado | 80218 | - |
| Swedish Medical Center | Englewood | Colorado | 80110 | - |
| Front Range Cancer Specialists | Fort Collins | Colorado | 80524 | - |
| Sky Ridge Medical Center | Lone Tree | Colorado | 80124 | - |
| Hope Cancer Care Center at Longmont United Hospital | Longmont | Colorado | 80502 | - |
| St. Mary-Corwin Regional Medical Center | Pueblo | Colorado | 81004 | - |
| North Suburban Medical Center | Thorton | Colorado | 80229 | - |
| Mayo Clinic - Jacksonville | Jacksonville | Florida | 32224 | - |
| Kapiolani Medical Center at Pali Momi | ‘Aiea | Hawaii | 96701 | - |
| Cancer Research Center of Hawaii | Honolula | Hawaii | 96813 | - |
| Kapiolani Medical Center for Women and Children | Honolulu | Hawaii | 96826 | - |
| OnCare Hawaii, Incorporated - Kuakini | Honolulu | Hawaii | 96817 | - |
| OnCare Hawaii, Incorporated - Lusitana | Honolulu | Hawaii | 96813 | - |
| Queen's Cancer Institute at Queen's Medical Center | Honolulu | Hawaii | 96813 | - |
| St. Francis Medical Center | Honolulu | Hawaii | 96817 | - |
| Straub Clinic and Hospital, Incorporated | Honolulu | Hawaii | 96813 | - |
| Rush-Copley Cancer Care Center | Aurora | Illinois | 60507 | - |
| St. Joseph Medical Center | Bloomington | Illinois | 61701 | - |
| Graham Hospital | Canton | Illinois | 61520 | - |
| Memorial Hospital | Carthage | Illinois | 62321 | - |
| St. Anthony's Memorial Hospital | Effingham | Illinois | 62401 | - |
| Eureka Community Hospital | Eureka | Illinois | 61530 | - |
| Galesburg Clinic | Galesburg | Illinois | 61401 | - |
| Galesburg Cottage Hospital | Galesburg | Illinois | 61401 | - |
| Mason District Hospital | Havana | Illinois | 62644 | - |
| Hopedale Medical Complex | Hopedale | Illinois | 61747 | - |
| Joliet Oncology-Hematology Associates, Limited - West | Joliet | Illinois | 60435 | - |
| Kewanee Hospital | Kewanee | Illinois | 61443 | - |
| McDonough District Hospital | Macomb | Illinois | 61455 | - |
| - | Moline | Illinois | 61265 | - |
| Trinity Medical Center - East | Moline | Illinois | 61265 | - |
| BroMenn Regional Medical Center | Normal | Illinois | 61761 | - |
| Community Cancer Center | Normal | Illinois | 61761 | - |
| Community Hospital of Ottawa | Ottawa | Illinois | 61350 | - |
| Oncology Hematology Associates of Central Illinois, PC - Ottawa | Ottawa | Illinois | 61350 | - |
| Cancer Treatment Center at Pekin Hospital | Pekin | Illinois | 61554 | - |
| CCOP - Illinois Oncology Research Association | Peoria | Illinois | 61615 | - |
| Methodist Medical Center of Illinois | Peoria | Illinois | 61636 | - |
| Oncology Hematology Associates of Central Illinois, PC - Peoria | Peoria | Illinois | 61615 | - |
| OSF St. Francis Medical Center | Peoria | Illinois | 61637 | - |
| Proctor Hospital | Peoria | Illinois | 61614 | - |
| Illinois Valley Community Hospital | Peru | Illinois | 61354 | - |
| Perry Memorial Hospital | Princeton | Illinois | 61356 | - |
| St. Margaret's Hospital | Spring Valley | Illinois | 61362 | - |
| Carle Cancer Center at Carle Foundation Hospital | Urbana | Illinois | 61801 | - |
| CCOP - Carle Cancer Center | Urbana | Illinois | 61801 | - |
| Saint Anthony Memorial Health Centers | Michigan City | Indiana | 46360 | - |
| McFarland Clinic, P. C. | Ames | Iowa | 50010 | - |
| - | Bettendorf | Iowa | 52722 | - |
| Cedar Rapids Oncology Associates | Cedar Rapids | Iowa | 52403 | - |
| Mercy Regional Cancer Center at Mercy Medical Center | Cedar Rapids | Iowa | 52403 | - |
| St. Luke's Hospital | Cedar Rapids | Iowa | 52402 | - |
| CCOP - Iowa Oncology Research Association | Des Moines | Iowa | 50309 | - |
| John Stoddard Cancer Center at Iowa Lutheran Hospital | Des Moines | Iowa | 50316-2301 | - |
| John Stoddard Cancer Center at Iowa Methodist Medical Center | Des Moines | Iowa | 50309 | - |
| Medical Oncology and Hematology Associates at John Stoddard Cancer Center | Des Moines | Iowa | 50309 | - |
| Medical Oncology and Hematology Associates at Mercy Cancer Center | Des Moines | Iowa | 50314 | - |
| Mercy Cancer Center at Mercy Medical Center - Des Moines | Des Moines | Iowa | 50314 | - |
| Mercy Capitol Hospital | Des Moines | Iowa | 50307 | - |
| Ottumwa Regional Health Center Cancer Center | Ottumwa | Iowa | 52501 | - |
| Mercy Medical Center - Sioux City | Sioux City | Iowa | 51104 | - |
| Siouxland Hematology-Oncology Associates, LLP | Sioux City | Iowa | 51101 | - |
| Siouxland Regional Cancer Center | Sioux City | Iowa | 51101 | - |
| St. Luke's Regional Medical Center | Sioux City | Iowa | 51104 | - |
| Medical Oncology and Hematology Associates - West Des Moines | West Des Moines | Iowa | 50266 | - |
| 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 | - |
| Cancer Center of Kansas, PA - Kingman | Kingman | Kansas | 67068 | - |
| Southwest Medical Center | Liberal | Kansas | 67901 | - |
| Cancer Center of Kansas, PA - Newton | Newton | Kansas | 67114 | - |
| 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 | - |
| 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 | - |
| Hickman Cancer Center at Bixby Medical Center | Adrian | Michigan | 49221 | - |
| CCOP - Michigan Cancer Research Consortium | Ann Arbor | Michigan | 48106 | - |
| St. Joseph Mercy Cancer Center at St. Joseph Mercy Hospital | Ann Arbor | Michigan | 48106-0995 | - |
| Oakwood Cancer Center at Oakwood Hospital and Medical Center | Dearborn | Michigan | 48123-2500 | - |
| Green Bay Oncology, Limited - Escanaba | Escanaba | Michigan | 49431 | - |
| Genesys Hurley Cancer Institute | Flint | Michigan | 48503 | - |
| Hurley Medical Center | Flint | Michigan | 48503 | - |
| Van Elslander Cancer Center at St. John Hospital and Medical Center | Grosse Pointe Woods | Michigan | 48236 | - |
| Green Bay Oncology, Limited - Iron Mountain | Iron Mountain | Michigan | 49801 | - |
| Foote Hospital | Jackson | Michigan | 49201 | - |
| Haematology-Oncology Associates of Ohio and Michigan, P.C. | Lambertville | Michigan | 48144 | - |
| Sparrow Regional Cancer Center | Lansing | Michigan | 48909 | - |
| Community Cancer Center of Monroe | Monroe | Michigan | 48162 | - |
| Mercy Memorial Hospital System | Monroe | Michigan | 48162 | - |
| Seton Cancer Institute - Saginaw | Saginaw | Michigan | 48601 | - |
| St. John Macomb Hospital | Warren | Michigan | 48093 | - |
| - | Alexandria | Minnesota | 56308 | - |
| MeritCare Clinic - Bemidji | Bemidji | Minnesota | 56601 | - |
| Brainerd Medical Center | Brainerd | Minnesota | 56401 | - |
| St. Joseph's Medical Center | Brainerd | Minnesota | 56401 | - |
| Fairview Ridges Hospital | Burnsville | Minnesota | 55337 | - |
| Mercy and Unity Cancer Center at Mercy Hospital | Coon Rapids | Minnesota | 55433 | - |
| Fairview Southdale Hospital | Edina | Minnesota | 55435 | - |
| - | Fergus Falls | Minnesota | 56537 | - |
| Mercy and Unity Cancer Center at Unity Hospital | Fridley | Minnesota | 55432 | - |
| Hutchinson Area Health Care | Hutchinson | Minnesota | 55350 | - |
| Meeker County Memorial Hospital | Lichfield | Minnesota | 55355 | - |
| HealthEast Cancer Care at St. John's Hospital | Maplewood | Minnesota | 55109 | - |
| Hennepin County Medical Center - Minneapolis | Minneapolis | Minnesota | 55415 | - |
| Virginia Piper Cancer Institute at Abbott-Northwestern Hospital | Minneapolis | Minnesota | 55407 | - |
| Chippewa County - Montevideo Hospital | Montevideo | Minnesota | 56265 | - |
| Hubert H. Humphrey Cancer Center at North Memorial Medical Center | Robbinsdale | Minnesota | 55422-2900 | - |
| Mayo Clinic Cancer Center | Rochester | Minnesota | 55905 | - |
| CentraCare Clinic - River Campus | Saint Cloud | Minnesota | 56303 | - |
| Coborn Cancer Center | Saint Cloud | Minnesota | 56303 | - |
| CCOP - Metro-Minnesota | Saint Louis Park | Minnesota | 55416 | - |
| Park Nicollet Health Services | Saint Louis Park | Minnesota | 55416 | - |
| Regions Hospital Cancer Care Center | Saint Paul | Minnesota | 55101 | - |
| St. Joseph's Hospital | Saint Paul | Minnesota | 55102 | - |
| United Hospital | Saint Paul | Minnesota | 55102 | - |
| Adult and Pediatric Urology, P.L.L.P. | Sartell | Minnesota | 56377 | - |
| Saint Francis Cancer Center | Shakopee | Minnesota | 55379 | - |
| Ridgeview Medical Center | Waconia | Minnesota | 55387 | - |
| Woodwinds Health Campus | Woodbury | Minnesota | 55125 | - |
| CCOP - Montana Cancer Consortium | Billings | Montana | 59101 | - |
| Deaconess Billings Clinic - Downtown | Billings | Montana | 59107-7000 | - |
| Deaconess Billings Clinic Cancer Center | Billings | Montana | 59107-5100 | - |
| Hematology-Oncology Centers of the Northern Rockies - Billings | Billings | Montana | 59101 | - |
| 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 | - |
| Glacier Oncology, PLLC | Kalispell | Montana | 59901 | - |
| Kalispell Medical Oncology | Kalispell | Montana | 59901 | - |
| Kalispell Regional Medical Center | Kalispell | Montana | 59901 | - |
| Community Medical Center | Missoula | Montana | 59801 | - |
| 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 | - |
| Bryan LGH Medical Center - West | Lincoln | Nebraska | 68502 | - |
| Cancer Resource Center - Lincoln | Lincoln | Nebraska | 68510 | - |
| St. Elizabeth Regional Medical Center | Lincoln | Nebraska | 68510 | - |
| Rutherford Hospital | Rutherfordton | North Carolina | 28139 | - |
| Bismarck Cancer Center | Bismarck | North Dakota | 58501 | - |
| Cancer Care Center at Medcenter One Hospital | Bismarck | North Dakota | 58501 | - |
| Mid Dakota Clinic, P. C. | Bismarck | North Dakota | 58501 | - |
| St. Alexius Medical Center | Bismarck | North Dakota | 58502 | - |
| CCOP - MeritCare Hospital | Fargo | North Dakota | 58122 | - |
| MeritCare Medical Group | Fargo | North Dakota | 58122 | - |
| Altru Cancer Center at Altru Hospital | Grand Forks | North Dakota | 58201 | - |
| Wood County Oncology Center | Bowling Green | Ohio | 43402 | - |
| Blanchard Valley Medical Associates | Findlay | Ohio | 45840 | - |
| Fremont Memorial Hospital | Fremont | Ohio | 43420 | - |
| Kenton Oncology, Incorporated | Kenton | Ohio | 43326 | - |
| Lima Memorial Hospital | Lima | Ohio | 45804 | - |
| Northwest Ohio Oncology Center | Maumee | Ohio | 43537 | - |
| St. Luke's Hospital | Maumee | Ohio | 43537 | - |
| St. Charles Mercy Hospital | Oregon | Ohio | 43616 | - |
| Toledo Clinic - Oregon | Oregon | Ohio | 43616 | - |
| Firelands Regional Medical Center | Sandusky | Ohio | 44870 | - |
| North Coast Cancer Care, Incorporated | Sandusky | Ohio | 44870 | - |
| Promedica Cancer Center at Flower Hospital | Sylvania | Ohio | 43560 | - |
| Mercy Hospital of Tiffin | Tiffin | Ohio | 44883 | - |
| CCOP - Toledo Community Hospital | Toledo | Ohio | 43623 | - |
| Medical University of Ohio Cancer Center | Toledo | Ohio | 43614 | - |
| St. Vincent Mercy Medical Center | Toledo | Ohio | 43608 | - |
| Toledo Clinic, Incorporated - Main Clinic | Toledo | Ohio | 43623 | - |
| Toledo Hospital | Toledo | Ohio | 43606 | - |
| Toledo Surgical Specialists | Toledo | Ohio | 43623 | - |
| Fulton County Health Center | Wauseon | Ohio | 43567 | - |
| Morgan Cancer Center at Lehigh Valley Hospital - Cedar Crest | Allentown | Pennsylvania | 18105 | - |
| Geisinger Medical Center | Danville | Pennsylvania | 17822-0001 | - |
| Allegheny Cancer Center at Allegheny General Hospital | Pittsburgh | Pennsylvania | 15212 | - |
| Geisinger Medical Group - Scenery Park | State College | Pennsylvania | 16801 | - |
| Frank M. and Dorothea Henry Cancer Center at Geisinger Wyoming Valley Medical Center | Wilkes-Barre | Pennsylvania | 18711 | - |
| AnMed Health 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 | - |
| Rapid City Regional Hospital | Rapid City | South Dakota | 57701 | - |
| Avera Cancer Institute | Sioux Falls | South Dakota | 57105 | - |
| Medical X-Ray Center, PC | Sioux Falls | South Dakota | 57105 | - |
| Sioux Valley Hospital and University of South Dakota Medical Center | Sioux Falls | South Dakota | 57117-5039 | - |
| Green Bay Oncology, Limited at St. Mary's Hospital | Green Bay | Wisconsin | 54303 | - |
| Green Bay Oncology, Limited at St. Vincent Hospital | Green Bay | Wisconsin | 54301-3526 | - |
| St. Mary's Hospital Medical Center - Green Bay | Green Bay | Wisconsin | 54303 | - |
| St. Vincent Hospital Regional Cancer Center | Green Bay | Wisconsin | 54307-3508 | - |
| Franciscan Skemp Healthcare | La Crosse | Wisconsin | 54601 | - |
| Bay Area Cancer Care Center at Bay Area Medical Center | Marinette | Wisconsin | 54143 | - |
| Green Bay Oncology, Limited - Oconto Falls | Oconto Falls | Wisconsin | 54154 | - |
| Green Bay Oncology, Limited - Sturgeon Bay | Sturgeon Bay | Wisconsin | 54235 | - |
| Welch Cancer Center at Sheridan Memorial Hospital | Sheridan | Wyoming | 82801 | - |