| Newark Beth Israel Medical Center | Newark | NJ | |
| Charles R. Wood Cancer Center at Glens Falls Hospital | Glens Falls | NY | |
| Cancer Institute of New Jersey at UMDNJ - Robert Wood Johnson Medical School | New Brunswick | NJ | |
| Cancer Institute of New Jersey at Hamilton | Hamilton Square | NJ | |
| Cancer Institute of New Jersey at Cooper - Voorhees | Voorhees | NJ | |
| Our Lady of Mercy Medical Center Comprehensive Cancer Center | Bronx | NY | |
| Saint Francis Hospital Cancer Center | Poughkeepsie | NY | |
| Batte Cancer Center at Northeast Medical Center | Concord | NC | |
| Blumenthal Cancer Center at Carolinas Medical Center | Charlotte | NC | |
| Annie Penn Cancer Center | Reidsville | NC | |
| Alamance Cancer Center at Alamance Regional Medical Center | Burlington | NC | |
| Tucker Center for Cancer Care at Orange Regional Medical Center | Middletown | NY | |
| Seacoast Cancer Center at Wentworth - Douglass Hospital | Dover | NH | |
| Immanuel Medical Center | | | |
| St. James Healthcare Cancer Care | Butte | MT | |
| St. Peter's Hospital | Helena | MT | |
| Sletten Cancer Institute at Benefis Healthcare | Great Falls | MT | |
| Northern Rockies Radiation Oncology Center | Billings | MT | |
| Montana Cancer Specialists at Montana Cancer Center | Missoula | MT | |
| St. Vincent Healthcare Cancer Care Services | Billings | MT | |
| Alegant Health Cancer Center at Bergan Mercy Medical Center | Omaha | NE | |
| Good Samaritan Cancer Center at Good Samaritan Hospital | Kearney | NE | |
| Creighton University Medical Center | Omaha | NE | |
| CCOP - Missouri Valley Cancer Consortium | Omaha | NE | |
| Cancer Resource Center - Lincoln | Lincoln | NE | |
| Forsyth Regional Cancer Center at Forsyth Medical Center | Winston Salem | NC | |
| Hope A Women's Cancer Center | Asheville | NC | |
| Case Comprehensive Cancer Center | Cleveland | OH | |
| CCOP - Dayton | Dayton | OH | |
| Cancer Treatment Center | Wooster | OH | |
| Cancer Care Center, Incorporated | Salem | OH | |
| Blanchard Valley Medical Associates | Findlay | OH | |
| CCOP - Toledo Community Hospital | Toledo | OH | |
| Charles F. Kettering Memorial Hospital | Dayton | OH | |
| Fulton County Health Center | Wauseon | OH | |
| Good Samaritan Hospital | | | |
| Flower Hospital Cancer Center | Sylvania | OH | |
| David L. Rike Cancer Center at Miami Valley Hospital | Dayton | OH | |
| Clinton Memorial Hospital | Wilmington | OH | |
| Barberton Citizens Hospital | Barberton | OH | |
| Aultman Cancer Center at Aultman Hospital | Canton | OH | |
| Presbyterian Cancer Center at Presbyterian Hospital | Charlotte | NC | |
| Randolph Hospital | Asheboro | NC | |
| Moses Cone Regional Cancer Center at Wesley Long Community Hospital | Greensboro | NC | |
| Marion L. Shepard Cancer Center at Beaufort County Hospital | Washington | NC | |
| Iredell Memorial Hospital | Statesville | NC | |
| Rutherford Hospital | Rutherfordton | NC | |
| Southeastern Medical Oncology Center - Goldsboro | Goldsboro | NC | |
| Arthur G. James Cancer Hospital and Richard J. Solove Research Institute at Ohio State University Comprehensive Cancer Center | Columbus | Ohio | |
| Altru Cancer Center at Altru Hospital | Grand Forks | ND | |
| Wayne Memorial Hospital, Incorporated | Goldsboro | NC | |
| Wake Forest University Comprehensive Cancer Center | Winston Salem | NC | |
| Montana Cancer Center at St. Patrick Hospital and Health Sciences Center | Missoula | MT | |
| Kalispell Regional Medical Center | Kalispell | MT | |
| Miller - Dwan Medical Center | Duluth | MN | |
| Minnesota Oncology Hematology, PA - Maplewood | Maplewood | MN | |
| Mercy and Unity Cancer Center at Unity Hospital | Minneapolis | MN | |
| Mercy and Unity Cancer Center at Mercy Hospital | Minneapolis | MN | |
| Hubert H. Humphrey Cancer Center at North Memorial Outpatient Center | Minneapolis | MN | |
| Minnesota Oncology Hematology, PA - Woodbury | Saint Paul | MN | |
| Park Nicollet Cancer Center | Saint Louis Park | MN | |
| Virginia Piper Cancer Institute at Abbott - Northwestern Hospital | Minneapolis | MN | |
| Hattiesburg Clinic, PA at Forrest General | Hattiesburg | MS | |
| United Hospital | St. Paul | MN | |
| St. Francis Cancer Center at St. Francis Medical Center | Shakopee | MN | |
| Ridgeview Medical Center | Waconia | MN | |
| Hennepin County Medical Center - Minneapolis | Minneapolis | MN | |
| Fairview Southdale Hospital | | | |
| St. Joseph Mercy Oakland | Pontiac | MI | |
| St. Mary Mercy Hospital | Livonia | MI | |
| St. John Macomb Hospital | Warren | MI | |
| Sparrow Regional Cancer Center | Lansing | MI | |
| Seton Cancer Institute at Saint Mary's - Saginaw | Saginaw | MI | |
| Van Elslander Cancer Center at St. John Hospital and Medical Center | Grosse Pointe | MI | |
| West Michigan Cancer Center | Kalamazoo | MI | |
| Fairview Ridges Hospital | Burnsville | MN | |
| Duluth Clinic Cancer Center - Duluth | Duluth | MN | |
| CCOP - Metro-Minnesota | Minneapolis | MN | |
| CCOP - Duluth | Duluth | MN | |
| CCOP - Cancer Research for the Ozarks | Springfield | MO | |
| CCOP - Kansas City | Kansas City | MO | |
| Billings Clinic - Downtown | Billings | MT | |
| Bozeman Deaconess Cancer Center | Bozeman | MT | |
| Big Sky Oncology | Great Falls | Mt | |
| Truman Medical Center - Hospital Hill | Kansas City | MO | |
| St. John's Regional Medical Center | | | |
| CCOP - Montana Cancer Consortium | Billings | MT | |
| Community Medical Center | | | |
| Hematology-Oncology Centers of the Northern Rockies - Billings | Billings | MT | |
| Kalispell Medical Oncology at KRMC | Kalispell | MT | |
| Guardian Oncology and Center for Wellness | Missoula | MT | |
| Great Falls Clinic - Main Facility | Great Falls | MT | |
| Glacier Oncology, PLLC | Kalispell | MT | |
| St. John's Regional Health Center | | | |
| Saint Luke's Cancer Institute at Saint Luke's Hospital | Kansas City | MO | |
| Heartland Regional Medical Center | St Joseph | MO | |
| Hulston Cancer Center at Cox Medical Center South | Springfield | MO | |
| Ellis Fischel Cancer Center at University of Missouri - Columbia | Columbia | MO | |
| David C. Pratt Cancer Center at St. John's Mercy | St Louis | MO | |
| CCOP - St. Louis-Cape Girardeau | Saint Louis | MO | |
| Liberty Hospital | Liberty | MO | |
| Midwest Hematology Oncology Group, Incorporated | Saint Louis | MO | |
| Saint Louis University Cancer Center | Saint Louis | MO | |
| Saint Francis Medical Center | Cape Girardeau | MO | |
| Research Medical Center | | | |
| Parvin Radiation Oncology | Kansas City | MO | |
| Grandview Hospital | Dayton | OH | |
| Hematology Oncology Center | Elyria | OH | |
| Franciscan Cancer Center at St. Joseph Medical Center | Tacoma | WA | |
| Good Samaritan Cancer Center | Puyallup | WA | |
| CCOP - Northwest | Tacoma | WA | |
| Auburn Regional Center for Cancer Care | Auburn | WA | |
| Allenmore Hospital | Tacoma | WA | |
| MultiCare Regional Cancer Center at Tacoma General Hospital | Tacoma | WA | |
| Providence Centralia Hospital | Centralia | WA | |
| Community Comprehensive Cancer Center at Camden-Clark Memorial Hospital | Parkersburg | WV | |
| Mary Babb Randolph Cancer Center at West Virginia University Hospitals | Morgantown | WV | |
| St. Francis Hospital | Evanston | IL | |
| St. Clare Hospital | Lakewood | WA | |
| Providence St. Peter Hospital Regional Cancer Center | Olympia | WA | |
| Virginia Commonwealth University Massey Cancer Center | Richmond | VA | |
| Fredericksburg Oncology, Incorporated | Fredericksburg | VA | |
| Jon and Karen Huntsman Cancer Center at Intermountain Medical Center | Salt Lake City | UT | |
| LDS Hospital | Salt Lake City | UT | |
| Huntsman Cancer Institute at University of Utah | Salt Lake City | UT | |
| Dixie Regional Medical Center - East Campus | Saint George | UT | |
| American Fork Hospital | | | |
| Sandra L. Maxwell Cancer Center | Cedar City | UT | |
| Utah Cancer Specialists at UCS Cancer Center | Salt Lake City | UT | |
| Mountainview Medical | Montpelier | VT | |
| Fletcher Allen Health Care - University Health Center Campus | Burlington | VT | |
| Val and Ann Browning Cancer Center at McKay-Dee Hospital Center | Ogden | UT | |
| Utah Valley Regional Medical Center - Provo | Provo | UT | |
| Schiffler Cancer Center at Wheeling Hospital | Wheeling | WV | |
| West Virginia University Health Sciences Center - Charleston | Charleston | WV | |
| Welch Cancer Center at Sheridan Memorial Hospital | Sheridan | WY | |
| CHUM - Hopital Saint-Luc | Montreal | Quebec | |
| Vince Lombardi Cancer Clinic - Oshkosh | Oshkosh | WI | |
| Vince Lombardi Cancer Clinic - Green Bay at Aurora BayCare Medical Center | Green Bay | WI | |
| Saint Joseph's Hospital | Marshfield | WI | |
| CHUM - Hotel Dieu Hospital | Montreal | Quebec | |
| Hopital Notre-Dame du CHUM | Montreal | Quebec | |
| St. Mary's Hospital Center | Montreal | Quebec | |
| San Juan City Hospital | San Juan | | |
| Royal Victoria Hospital - Montreal | Montreal | Quebec | |
| Montreal General Hospital | Montreal | Quebec | |
| Jewish General Hospital - Montreal | Montreal | Quebec | |
| Ministry Medical Group at Saint Mary's Hospital | Rhinelander | WI | |
| Medical College of Wisconsin Cancer Center | Milwaukee | WI | |
| Marshfield Clinic - Chippewa Center | Chippewa Falls | WI | |
| Marshfield Clinic - Indianhead Center | Rice Lake | WI | |
| Gundersen Lutheran Center for Cancer and Blood | La Crosse | WI | |
| Aurora Women's Pavilion of West Allis Memorial Hospital | Milwaukee | WI | |
| Aurora Sinai Medical Center | Milwaukee | WI | |
| Marshfield Clinic - Lakeland Center | Minocqua | WI | |
| Marshfield Clinic - Marshfield Center | Marshfield | WI | |
| Marshfield Clinic Cancer Care at Regional Cancer Center | Eau Claire | WI | |
| Marshfield Clinic - Wisconsin Rapids Center | Wisconsin Rapids | WI | |
| Marshfield Clinic - Weston Center | Weston | WI | |
| Marshfield Clinic - Wausau Center | Wausau | WI | |
| University of Texas Health Science Center at San Antonio | San Antonio | TX | |
| Doctor's Hospital of Laredo | Laredo | TX | |
| Toledo Clinic, Incorporated - Main Clinic | Toledo | OH | |
| Toledo Hospital | | | |
| Toledo Clinic - Oregon | Oregon | OH | |
| Summa Center for Cancer Care at Akron City Hospital | Akron | OH | |
| St. Vincent Mercy Medical Center | Toledo | OH | |
| UVMC Cancer Care Center at Upper Valley Medical Center | Troy | OH | |
| Wayne Hospital | Greenville | OH | |
| Allegheny Cancer Center at Allegheny General Hospital | Pittsburgh | PA | |
| Bryn Mawr Hospital | Bryn Mawr | PA | |
| Kaiser Permanente Health Care - Portland | Portland | OR | |
| Cleo Craig Cancer Research Clinic | Lawton | OK | |
| Wood County Oncology Center | Bowling Green | OH | |
| St. Luke's Hospital | Bethlehem | PA | |
| St. Charles Mercy Hospital | Oregon | OH | |
| Mercy Hospital of Tiffin | Tiffin | OH | |
| Middletown Regional Hospital | Middletown | OH | |
| Medical University of Ohio Cancer Center | Toledo | OH | |
| McDowell Cancer Center at Akron General Medical Center | Akron | OH | |
| Lima Memorial Hospital | | | |
| North Coast Cancer Care - Clyde | Clyde | OH | |
| North Coast Cancer Care, Incorporated | Sandusky | OH | |
| St. Anne Mercy Hospital | Toledo | OH | |
| Samaritan North Cancer Care Center | Dayton | OH | |
| Ruth G. McMillan Cancer Center at Greene Memorial Hospital | Xenia | OH | |
| Northwest Ohio Oncology Center | Maumee | OH | |
| Cancer Center of Paoli Memorial Hospital | Paoli | PA | |
| CCOP - Main Line Health | Wynnewood | PA | |
| Hollings Cancer Center at Medical University of South Carolina | Charleston | SC | |
| Roper St. Francis Cancer Center at Roper Hospital | Charleston | SC | |
| Gibbs Regional Cancer Center at Spartanburg Regional Medical Center | Spartanburg | SC | |
| CCOP - Upstate Carolina | Spartanburg | SC | |
| CCOP - Greenville | Greenville | SC | |
| Medical X-Ray Center, PC | Sioux Falls | SD | |
| Sanford Cancer Center at Sanford USD Medical Center | Sioux Falls | SD | |
| University of Tennessee Cancer Institute - Memphis | Germantown | TN | |
| Thompson Cancer Survival Center | Knoxville | TN | |
| Nashville Oncology Associates, PC | Nashville | TN | |
| MBCCOP - Meharry Medical College - Nashville | Nashville | TN | |
| AnMed Cancer Center | Anderson | SC | |
| York Cancer Center at Apple Hill Medical Center | York | PA | |
| Geisinger Medical Group - Scenery Park | State College | PA | |
| Lankenau Cancer Center at Lankenau Hospital | Wynnewood | PA | |
| Geisinger Cancer Institute at Geisinger Health | Danville | PA | |
| Frank M. and Dorothea Henry Cancer Center at Geisinger Wyoming Valley Medical Center | Wilkes-Barre | Pennsylvania | |
| Cherry Tree Cancer Center | Hanover | PA | |
| McGlinn Family Regional Cancer Center at Reading Hospital and Medical Center | Reading | PA | |
| Morgan Cancer Center at Lehigh Valley Hospital - Cedar Crest | Allentown | PA | |
| UPMC Cancer Centers | Pittsburgh | PA | |
| St. Luke's Cancer Network at St. Luke's Hospital | Bethlehem | PA | |
| Penn State Cancer Institute at Milton S. Hershey Medical Center | Hershey | PA | |
| Mount Nittany Medical Center | State College | PA | |
| Saint Joseph Mercy Cancer Center | Ann Arbor | MI | |
| Providence Cancer Institute at Providence Hospital - Southfield Campus | Southfield | MI | |
| Aurora Presbyterian Hospital | | | |
| Boulder Community Hospital | | | |
| Valley Medical Oncology | Fremont | CA | |
| Valley Medical Oncology Consultants - Pleasanton | Pleasanton | CA | |
| Valley Medical Oncology Consultants - Castro Valley | Castro Valley | CA | |
| CCOP - Colorado Cancer Research Program | Denver | CO | |
| Exempla Lutheran Medical Center | Wheat Ridge | CO | |
| North Colorado Medical Center | Greeley | CO | |
| North Suburban Medical Center | Thornton | CO | |
| Memorial Hospital Cancer Center - Colorado Springs | Colorado Springs | CO | |
| McKee Medical Center | Loveland | CO | |
| Hope Cancer Care Center at Longmont United Hospital | Longmont | CO | |
| Valley Care Medical Center | Pleasanton | CA | |
| Tom K Lee, Incorporated | Oakland | CA | |
| Kaiser Permanente Medical Center - Walnut Creek | Walnut Creek | CA | |
| Kaiser Permanente Medical Facility - Stockton | Stockton | CA | |
| Kaiser Permanente Medical Center - Vallejo | Vallejo | CA | |
| Kaiser Permanente Medical Center - South San Francisco | South San Francisco | CA | |
| Kaiser Permanente Medical Center - Santa Teresa | San Jose | CA | |
| Larry G Strieff MD Medical Corporation | Oakland | CA | |
| Pacific Shores Medical Group - Long Beach | Long Beach | CA | |
| St. Joseph Hospital Regional Cancer Center - Orange | Orange | CA | |
| South Sacramento Kaiser-Permanente Medical Center | Sacramento | CA | |
| Scripps Cancer Center - San Diego | La Jolla | CA | |
| Salinas Valley Memorial Hospital | Salinas | CA | |
| Penrose Cancer Center at Penrose Hospital | Colorado Springs | CO | |
| Porter Adventist Hospital | Denver | CO | |
| Herbert D. Kerman Regional Oncology Center - Daytona Beach | Daytona Beach | FL | |
| M.D. Anderson Cancer Center at Orlando | Orlando | FL | |
| Florida Hospital Cancer Institute at Florida Hospital Orlando | Orlando | FL | |
| Broward General Medical Center Cancer Center | Fort Lauderdale | FL | |
| Baptist Cancer Institute - Jacksonville | Jacksonville | FL | |
| Curtis and Elizabeth Anderson Cancer Institute at Memorial Health University Medical Center | Savannah | Georgia | |
| Nancy N. and J. C. Lewis Cancer and Research Pavilion at St. Joseph's/Candler | Savannah | GA | |
| Hawaii Medical Center - East | Honolulu | HI | |
| Kapiolani Medical Center at Pali Momi | Aiea | HI | |
| Cancer Research Center of Hawaii | Honolulu | HI | |
| Phoebe Cancer Center at Phoebe Putney Memorial Hospital | Albany | GA | |
| Northeast Georgia Medical Center | Gainesville | GA | |
| Tunnell Cancer Center at Beebe Medical Center | Lewes | DE | |
| CCOP - Christiana Care Health Services | Newark | DE | |
| St. Anthony Central Hospital | Denver | CO | |
| St. Joseph Hospital | Denver | CO | |
| Sky Ridge Medical Center | Lone Tree | CO | |
| Rose Medical Center | Denver | CO | |
| Presbyterian - St. Luke's Medical Center | Denver | CO | |
| St. Mary - Corwin Regional Medical Center | Pueblo | CO | |
| St. Mary's Regional Cancer Center at St. Mary's Hospital and Medical Center | Grand Junction | CO | |
| Saint Francis/Mount Sinai Regional Cancer Center at Saint Francis Hospital and Medical Center | Hartford | Connecticut | |
| Helen and Harry Gray Cancer Center at Hartford Hospital | Hartford | CT | |
| Carole and Ray Neag Comprehensive Cancer Center at the University of Connecticut Health Center | Farmington | Connecticut | |
| Swedish Medical Center | | | |
| Kaiser Permanente Medical Center - Santa Rosa | Santa Rosa | CA | |
| Kaiser Permanente Medical Center - Santa Clara Kiely Campus | Santa Clara | CA | |
| St. Mary's Hospital Medical Center - Green Bay | Green Bay | WI | |
| St. Vincent Hospital Regional Cancer Center | Green Bay | WI | |
| Green Bay Oncology, Limited at St. Vincent Hospital Regional Cancer Center | Green Bay | WI | |
| Green Bay Oncology, Limited at St. Mary's Hospital | Green Bay | WI | |
| Diagnostic and Treatment Center | Schofield | WI | |
| Hopedale Medical Complex | Hopedale | IL | |
| Kootenai Cancer Center - Coeur d'Alene | Coeur D Alene | ID | |
| Loma Linda University Cancer Institute at Loma Linda University Medical Center | Loma Linda | CA | |
| James Graham Brown Cancer Center at University of Louisville | Louisville | KY | |
| George Bray Cancer Center at the Hospital of Central Connecticut - New Britain Campus | New Britain | Connecticut | |
| Danville Regional Medical Center | Danville | VA | |
| Union Hospital Cancer Program at Union Hospital | Elkton | MD | |
| Center for Cancer Treatment & Prevention at Sacred Heart Hospital | Eau Claire | WI | |
| Bay Area Cancer Care Center at Bay Area Medical Center | Marinette | WI | |
| Independence Regional Health Center | | | |
| Veterans Affairs Medical Center - Dayton | Dayton | OH | |
| Avera Cancer Institute | Sioux Falls | SD | |
| Clinton Memorial Hospital | | | |
| Clemens Regional Medical Center | Mount Clemens | Michigan | |
| CancerCare of Maine at Eastern Maine Medical Center | Bangor | ME | |
| Kaiser Permanente Medical Office -Vandever Medical Office | San Diego | CA | |
| Michael and Dianne Bienes Comprehensive Cancer Center at Holy Cross Hospital | Fort Lauderdale | FL | |
| Ella Milbank Foshay Cancer Center at Jupiter Medical Center | Jupiter | FL | |
| CCOP - Mount Sinai Medical Center | Miami Beach | FL | |
| Sibley Memorial Hospital | Washington | DC | |
| Barbara Ann Karmanos Cancer Institute | | | |
| North Kansas City Hospital | | | |
| Kaiser Foundation Hospital - San Rafael | San Rafael | CA | |
| Kaiser Permanente - Fremont | Fremont | CA | |
| Highland General Hospital | Oakland | CA | |
| El Camino Hospital Cancer Center | Mountain View | CA | |
| Eden Medical Center | Castro Valley | CA | |
| Kaiser Permanente Medical Center - Hayward | Hayward | CA | |
| Kaiser Permanente Medical Center - Oakland | Oakland | CA | |
| Kaiser Permanente Medical Center - Sacramento | Sacramento | CA | |
| Kaiser Permanente Medical Center - San Francisco Geary Campus | San Francisco | CA | |
| Kaiser Permanente Medical Center - Roseville | Roseville | CA | |
| Kaiser Permanente Medical Center - Richmond | Richmond | CA | |
| Kaiser Permanente Medical Center - Redwood City | Redwood City | CA | |
| East Bay Radiation Oncology Center | Castro Valley | CA | |
| Doctors Medical Center - San Pablo Campus | San Pablo | CA | |
| Arkansas Cancer Research Center at University of Arkansas for Medical Sciences | Little Rock | AR | |
| Alta Bates Summit Medical Center - Summit Campus | Oakland | CA | |
| Hopital du Saint-Sacrement - Quebec | Quebec City | Quebec | |
| Western Pennsylvania Cancer Institute at Western Pennsylvania Hospital | Pittsburgh | PA | |
| Arthur G. James Cancer Hospital and Solove Research Institute at Ohio State University Medical Center | Columbus | Ohio | |
| Bay Area Breast Surgeons, Incorporated | Oakland | CA | |
| Breastlink Medical Group, Incorporated at Long Beach Memorial Medical Center | Long Beach | CA | |
| Desert Regional Medical Center Comprehensive Cancer Center | Palm Springs | CA | |
| Contra Costa Regional Medical Center | Martinez | CA | |
| CCOP - Bay Area Tumor Institute | Oakland | CA | |
| Cancer Care Associates | Oklahoma City | OK | |
| Kapiolani Medical Center for Women and Children | Honolulu | HI | |
| Maui Memorial Medical Center | Wailuku | HI | |
| Lucille P. Markey Cancer Center at University of Kentucky | Lexington | KY | |
| CCOP - Ochsner | New Orleans | LA | |
| Louisville Oncology at Norton Cancer Institute - Louisville | Louisville | KY | |
| Cancer Resource Center at King's Daughters Medical Center | Ashland | KY | |
| Wesley Medical Center | | | |
| Mary Bird Perkins Cancer Center - Baton Rouge | Baton Rouge | LA | |
| MBCCOP - LSU Health Sciences Center | New Orleans | LA | |
| Tulane Cancer Center Office of Clinical Research | Alexandria | LA | |
| York Hospital's Oncology Treatment Center | York | ME | |
| Ochsner Health Center - Bluebonnet | Baton Rouge | LA | |
| Ochsner Cancer Institute at Ochsner Clinic Foundation | New Orleans | LA | |
| Medical Center of Louisiana - New Orleans | New Orleans | LA | |
| Via Christi Cancer Center at Via Christi Regional Medical Center | Wichita | KS | |
| Southwest Medical Center | Liberal | KS | |
| Cancer Center of Kansas, PA - Wellington | Wellington | KS | |
| Cancer Center of Kansas, PA - Winfield | Winfield | KS | |
| Cancer Center of Kansas, PA - Salina | El Dorado | KS | |
| Cancer Center of Kansas, PA - Pratt | Pratt | KS | |
| Cancer Center of Kansas, PA - Parsons | Parsons | KS | |
| Cancer Center of Kansas-Independence | Independence | KS | |
| CCOP - Wichita | Wichita | KS | |
| Shawnee Mission Medical Center | Shawnee Mission | KS | |
| Saint Luke's Hospital - South | Overland Park | KS | |
| Menorah Medical Center | Overland Park | KS | |
| Lawrence Memorial Hospital | Lawrence | KS | |
| Associates in Oncology and Hematology - Medical Center Drive | Gaithersburg | MD | |
| Associates in Oncology and Hematology | Chattanooga | TN | |
| Great Lakes Cancer Institute at McLaren Regional Medical Center | Flint | MI | |
| Haematology-Oncology Associates of Ohio and Michigan, PC | Lambertville | MI | |
| Genesys Hurley Cancer Institute | Flint | MI | |
| Foote Memorial Hospital | Jackson | MI | |
| Community Cancer Center of Monroe | Monroe | MI | |
| Hickman Cancer Center at Bixby Medical Center | Adrian | MI | |
| Hurley Medical Center | Flint | MI | |
| Mercy Regional Cancer Center at Mercy Hospital | Port Huron | MI | |
| Oakwood Cancer Center at Oakwood Hospital and Medical Center | Dearborn | MI | |
| Mercy Memorial Hospital - Monroe | Monroe | MI | |
| Lapeer Regional Hospital | Lapeer | MI | |
| Josephine Ford Cancer Center at Henry Ford Hospital | Detroit | MI | |
| CCOP - Michigan Cancer Research Consortium | Ann Arbor | MI | |
| Bronson Methodist Hospital | Kalamazoo | MI | |
| Harry & Jeanette Weinberg Cancer Institute at Franklin Square Hospital Center | Rosedale | MD | |
| Mercy Medical Center | Baltimore | MD | |
| Greenebaum Cancer Center at University of Maryland Medical Center | Baltimore | MD | |
| Greater Baltimore Medical Center Cancer Center | Towson | MD | |
| Frederick Memorial Hospital Regional Cancer Therapy Center | Frederick | MD | |
| Peninsula Regional Medical Center | Salisbury | MD | |
| St. Agnes Hospital Cancer Center | Baltimore | MD | |
| Breslin Cancer Center at Ingham Regional Medical Center | Lansing | MI | |
| Borgess Medical Center | Kalamazoo | MI | |
| Sturdy Memorial Hospital | Attleboro | MA | |
| MetroWest Medical Center - Framingham Union Hospital | Framingham | MA | |
| Cancer Center of Kansas, PA - Newton | Newton | KS | |
| Cancer Center of Kansas, PA - Medical Arts Tower | Wichita | KS | |
| Good Samaritan Regional Health Center | Mount Vernon | IL | |
| Graham Hospital | | | |
| Galesburg Cottage Hospital | | | |
| Galesburg Clinic, PC | Galesburg | IL | |
| Eureka Community Hospital | Eureka | IL | |
| Illinois Valley Community Hospital | | | |
| John H. Stroger, Jr. Hospital of Cook County | Chicago | IL | |
| Methodist Medical Center of Illinois | | | |
| Mount Sinai Hospital Medical Center | Chicago | IL | |
| Memorial Hospital | Carthage | IL | |
| McDonough District Hospital | Macomb | IL | |
| Mason District Hospital | | | |
| Edward Hospital Cancer Center | Naperville | IL | |
| Decatur Memorial Hospital Cancer Care Institute | Decatur | IL | |
| Queen's Cancer Institute at Queen's Medical Center | Honolulu | HI | |
| Straub Clinic and Hospital, Incorporated | Honolulu | HI | |
| Pacific Cancer Institute - Maui | Wailuku | HI | |
| OnCare Hawaii, Incorporated - Lusitana | Honolulu | HI | |
| OnCare Hawaii, Incorporated - Kuakini | Honolulu | HI | |
| Alexian Brothers Radiation Oncology | Elk Grove Village | IL | |
| BroMenn Regional Medical Center | Normal | IL | |
| Community Hospital of Ottawa | Ottawa | IL | |
| Community Cancer Center | Normal | IL | |
| CCOP - Illinois Oncology Research Association | Peoria | IL | |
| Cancer Treatment Center at Pekin Hospital | Pekin | IL | |
| Oncology Hematology Associates of Central Illinois, PC - Ottawa | Ottawa | IL | |
| Oncology Hematology Associates of Central Illinois, PC - Peoria | Peoria | IL | |
| McFarland Clinic, PC | Ames | IA | |
| Associates in Womens Health, PA - North Review | Wichita | KS | |
| Holden Comprehensive Cancer Center at University of Iowa | Iowa City | IA | |
| St. Vincent Indianapolis Hospital | Indianapolis | IN | |
| St. Francis Hospital and Health Centers - Beech Grove Campus | Beech Grove | IN | |
| Cancer Center of Kansas - Fort Scott | Fort Scott | KS | |
| Cancer Center of Kansas, PA - Kingman | Kingman | KS | |
| Cancer Center of Kansas, PA - El Dorado | El Dorado | KS | |
| Cancer Center of Kansas, PA - Dodge City | Dodge City | KS | |
| Cancer Center of Kansas, PA - Chanute | Chanute | KS | |
| Cancer Center of Kansas, PA - Wichita | Wichita | KS | |
| Reid Hospital & Health Care Services | Richmond | IN | |
| Fort Wayne Medical Oncology and Hematology | Fort Wayne | IN | |
| Regional Cancer Center at Memorial Medical Center | Springfield | IL | |
| Rush University Medical Center | Chicago | IL | |
| Proctor Hospital | Peoria | IL | |
| Perry Memorial Hospital | Princeton | IL | |
| OSF St. Francis Medical Center | Peoria | IL | |
| Saint Anthony's Hospital at Saint Anthony's Health Center | Alton | IL | |
| St. Joseph Medical Center | Kansas City | MO | |
| Community Hospital | Munster | IN | |
| Center for Cancer Care at Goshen General Hospital | Goshen | IN | |
| Swedish-American Regional Cancer Center | Rockford | IL | |
| St. Margaret's Hospital | Spring Valley | IL | |
| Joliet Oncology-Hematology Associates, Limited - West | Joliet | IL | |