What are oncology physician groups?<\/strong><\/p>\n\n\n\nOncology physician groups are healthcare organizations where oncologists, hematologists, and other cancer specialists work together to diagnose, treat, and manage cancer patients. These groups may operate independently, as community oncology practices, or as part of hospital systems and cancer networks.<\/p>\n\n\n\n
How many oncology physician groups are there in the US?<\/strong><\/p>\n\n\n\nAmpliz tracks more than 3,500+ oncology physician groups in the United States<\/strong>. The market includes independent oncology practices, community cancer centers, multispecialty physician groups, hospital-owned oncology clinics, and academic cancer centers.<\/p>\n\n\n\nWhat are the largest oncology physician groups in the US?<\/strong><\/p>\n\n\n\nSome of the largest oncology physician groups include The US Oncology Network, Texas Oncology, Florida Cancer Specialists & Research Institute, New York Cancer & Blood Specialists, Tennessee Oncology, Rocky Mountain Cancer Centers, and Arizona Oncology.<\/p>\n\n\n\n
What information is included in an oncology physician groups database?<\/strong><\/p>\n\n\n\nA comprehensive oncology physician groups database may include organization names, physician specialties, business email addresses, phone numbers, practice locations, NPIs, executive contacts, hospital affiliations, and organization details for healthcare marketing and sales.<\/p>\n\n\n\n
What is the difference between an oncology physician group and a cancer center?<\/strong><\/p>\n\n\n\nAn oncology physician group is a physician-led practice focused on cancer treatment, while a cancer center is a broader healthcare facility that may include oncology clinics, surgery, radiation therapy, diagnostics, research, and clinical trial programs.<\/p>\n","protected":false},"excerpt":{"rendered":"
Last updated on September 17th, 2026 Quick Answer: What Are the Largest Oncology Physician Groups in the US? The Oncology physician groups in the US market includes thousands of physician practices, community oncology groups, hospital-affiliated cancer programs, academic cancer centers, and multi-state oncology networks. For healthcare marketers, the most valuable targets are often not individual oncologists alone but the organizations, physician groups, practice networks, and decision-making teams that influence technology adoption, clinical services, diagnostics, pharmaceuticals, medical devices, staffing, and healthcare partnerships. Among the largest and most recognizable oncology organizations and networks are The US Oncology Network, Texas Oncology, Florida Cancer Specialists & Research Institute, New York Cancer & Blood Specialists, Tennessee Oncology, Rocky Mountain Cancer Centers, Arizona Oncology, Illinois Cancer Specialists, and other regional oncology practices. However, “largest” can mean different things. A group may be considered large based on its number of oncologists, practice locations, geographic footprint, patient volume, affiliations, or influence within community oncology. This guide provides a healthcare-marketer-focused view of the US oncology physician group landscape, including major organizations, market structure, buyer roles, targeting strategies, and the data points marketers should consider when building an oncology prospecting strategy. 2026 Market Snapshot: Ampliz currently tracks 3,500+ list of oncology physician groups in the US. The actual market is broader when hospital-owned oncology departments, academic cancer centers, multispecialty groups, and independent oncology practices are included. What Is an Oncology Physician Group? An oncology physician group is a healthcare organization in which physicians specializing in cancer diagnosis, treatment, and management practice together under a shared organizational structure. These organizations may include: The structure of an oncology organization can vary significantly. Some practices are independent community oncology groups. Others operate as part of a national oncology network, health system, academic medical center, or hospital system. For healthcare marketers, this distinction is important. The physician who treats a patient may not be the same person who makes decisions about: Therefore, an effective oncology marketing strategy requires more than a list of oncologists. It requires an understanding of the organization, its locations, specialties, affiliations, technology environment, and decision-making structure. How Many Oncology Physician Groups Are in the US? There are 3,500+ oncology physician groups in the US tracked in the Ampliz healthcare data ecosystem. The broader oncology provider market includes several types of organizations: Organization Type Typical Characteristics Independent oncology practices Physician-owned or independently operated Community oncology groups Local or regional cancer care providers National oncology networks Multi-state networks supporting community practices Hospital-owned oncology practices Oncology services operated by health systems Academic cancer centers Research, education, clinical care, and trials Multispecialty groups Oncology combined with other medical specialties Integrated cancer centers Comprehensive diagnosis and treatment services The number of organizations can change over time because of: For marketers building account lists, this means a static directory may become outdated quickly. A more useful oncology prospecting dataset should ideally identify current organizations, locations, physicians, executives, affiliations, specialties, and organizational relationships. List of Largest Oncology Physician Groups and Networks in the US The following organizations represent some of the most recognizable large oncology physician groups and networks in the United States. Important methodology note: Ranking oncology groups purely by “number of oncologists” can be misleading because organizations report physician counts differently. Some count affiliated physicians, while others report employed physicians, participating practices, or network members. Rank Group Name Location (HQ) No. of Oncologists Affiliation Data Set 1 The US Oncology Network The Woodlands, TX 1,500+ McKesson Explore 2 Florida Cancer Specialists Fort Myers, FL 250+ Independent Explore 3 Texas Oncology Dallas, TX 500+ US Oncology Network Explore 4 Minnesota Oncology Minneapolis, MN 100+ US Oncology Network Explore 5 New York Cancer & Blood Specialists New York, NY 120+ OneOncology Explore 6 Tennessee Oncology Nashville, TN 90+ OneOncology Explore 7 Rocky Mountain Cancer Centers Denver, CO 70+ US Oncology Network Explore 8 Arizona Oncology Tucson, AZ 65+ US Oncology Network Explore 9 Illinois Cancer Specialists Chicago, IL 60+ US Oncology Network Explore 10 Dayton Physicians Network Dayton, OH 50+ American Oncology Network Explore 11 Maryland Oncology Hematology Columbia, MD 60+ American Oncology Network Explore 12 Utah Cancer Specialists Salt Lake City, UT 40+ Independent Explore 13 Compass Oncology Portland, OR 40+ US Oncology Network Explore 14 Willamette Valley Cancer Institute Eugene, OR 35+ US Oncology Network Explore 15 Cancer Care Northwest Spokane, WA 30+ Independent Explore 16 Northwest Medical Specialties Tacoma, WA 28+ American Oncology Network Explore 17 Oncology Hematology Care (OHC) Cincinnati, OH 30+ American Oncology Network Explore 18 Michiana Hematology Oncology Mishawaka, IN 25+ Independent Explore 19 Cancer & Hematology Centers of Western Michigan Grand Rapids, MI 30+ Independent Explore 20 Florida Cancer Affiliates Ocala, FL 25+ US Oncology Network Explore Data source: Ampliz healthcare intelligence data. Accessed in August 2026. Access Now. Community Oncology vs. Academic Cancer Centers One of the most important decisions for healthcare marketers is determining whether they should target community oncology practices, academic cancer centers, or both. Factor Community Oncology Academic Cancer Centers Primary focus Patient care Patient care + research + education Geographic reach Local\/regional Regional\/national Decision-making Often practice\/network driven Often institutional Clinical trials Yes Strong emphasis Purchasing Practice\/network influence Institutional procurement Marketing approach Relationship + account-based Enterprise + institutional Sales cycle Can be shorter Often longer If your product is designed for community oncology, targeting a large academic cancer center may produce lower conversion rates than focusing on regional physician groups. Conversely, companies selling enterprise technology may need to prioritize health systems and academic institutions. The lesson: Your ideal customer profile should determine your oncology target list not the other way around. Why Oncology Physician Groups Are a Prime Marketing Target 1. High Prescribing Authority Oncologists often control formularies for cancer drugs, biosimilars, and specialty therapies making them decision-makers worth targeting. 2. Specialized Equipment Needs From infusion pumps to imaging, oncology groups purchase high-cost diagnostic and therapeutic equipment regularly. 3. Central to Patient Navigation These groups guide patients through all aspects of cancer care making them central touchpoints for products related to care coordination, EMRs, and<\/p>\n","protected":false},"author":13,"featured_media":6501,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2432],"tags":[],"class_list":["post-3688","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-physician-groups-by-specialties"],"_links":{"self":[{"href":"https:\/\/www.ampliz.com\/resources\/wp-json\/wp\/v2\/posts\/3688","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ampliz.com\/resources\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ampliz.com\/resources\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ampliz.com\/resources\/wp-json\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ampliz.com\/resources\/wp-json\/wp\/v2\/comments?post=3688"}],"version-history":[{"count":3,"href":"https:\/\/www.ampliz.com\/resources\/wp-json\/wp\/v2\/posts\/3688\/revisions"}],"predecessor-version":[{"id":6929,"href":"https:\/\/www.ampliz.com\/resources\/wp-json\/wp\/v2\/posts\/3688\/revisions\/6929"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ampliz.com\/resources\/wp-json\/wp\/v2\/media\/6501"}],"wp:attachment":[{"href":"https:\/\/www.ampliz.com\/resources\/wp-json\/wp\/v2\/media?parent=3688"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ampliz.com\/resources\/wp-json\/wp\/v2\/categories?post=3688"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ampliz.com\/resources\/wp-json\/wp\/v2\/tags?post=3688"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}