Shorten your sales cycle and improve ROI<\/li>\n<\/ul>\n\n\n\nWhether you\u2019re selling oncology-specific pharmaceuticals, infusion devices, EMR platforms, or diagnostics, Ampliz gives you the edge to market smarter and faster<\/strong>.<\/p>\n\n\n\nFAQs<\/strong><\/h2>\n\n\n\n1. What is the largest oncology physician group in the US?<\/strong>
The US Oncology Network is the largest, with over 1,500 affiliated oncologists across 20+ states.<\/p>\n\n\n\n2. How can I market to oncology physician groups?<\/strong>
Use data platforms like Ampliz to access decision-makers\u2019 contact information and segment your outreach based on group size, affiliation, and geography.<\/p>\n\n\n\n3. Are most oncology groups hospital-owned?<\/strong>
Not all \u2014 many are part of independent networks or national alliances like OneOncology or AON.<\/p>\n\n\n\n4. How often do oncology groups purchase new equipment or drugs?<\/strong>
Oncology groups frequently evaluate and adopt new drugs, devices, and software due to rapid advancements in cancer care.<\/p>\n","protected":false},"excerpt":{"rendered":"Last updated on March 30th, 2026 Introduction: Why Oncology Physician Groups Matter More Than Ever in 2026 As of 2026, list of 2,000+ oncology physician groups in US. The rise in cancer diagnoses, new immunotherapies, and personalized medicine has propelled oncology into one of the most critical specialties in US healthcare. With over 18 million cancer survivors in the US as of 2026, the demand for oncology services continues to climb. Physician groups specializing in oncology are leading this fight not only through treatment but also by driving research, clinical trials, and value-based care delivery. For healthcare marketers, oncology physician groups represent a high-value target audience. These groups often influence multi-million dollar decisions involving drugs, medical devices, diagnostics, and treatment protocols. Marketing to them requires precision, relevance, and above all, accurate data. Here, we list the Top 20 Oncology Physician Groups in the US, explain the broader landscape of oncology groups, and show you how to reach them effectively using Ampliz Healthcare Data Intelligence. What Are Oncology Physician Groups? Oncology physician groups are organized practices composed primarily of hematologists and oncologists who provide comprehensive cancer care. These groups may operate independently or be affiliated with major health systems, academic hospitals, or cancer institutes. They play a vital role in: Due to their size, patient volume, and specialized services, they are an essential segment for healthcare vendors from biotech firms to diagnostic labs. Top 20 Oncology Physician Groups in the US 2026 Here is a curated list of the most prominent oncology groups based on physician count, national presence, affiliations, and influence. Rank Group Name Location (HQ) No. of Oncologists Affiliation Data Set 1 The US Oncology Network The Woodlands, TX 1,500+ McKesson Access Now 2 Florida Cancer Specialists Fort Myers, FL 250+ Independent Access Now 3 Texas Oncology Dallas, TX 500+ US Oncology Network Access Now 4 Minnesota Oncology Minneapolis, MN 100+ US Oncology Network Access Now 5 New York Cancer & Blood Specialists New York, NY 120+ OneOncology Access Now 6 Tennessee Oncology Nashville, TN 90+ OneOncology Access Now 7 Rocky Mountain Cancer Centers Denver, CO 70+ US Oncology Network Access Now 8 Arizona Oncology Tucson, AZ 65+ US Oncology Network Access Now 9 Illinois Cancer Specialists Chicago, IL 60+ US Oncology Network Access Now 10 Dayton Physicians Network Dayton, OH 50+ American Oncology Network Access Now 11 Maryland Oncology Hematology Columbia, MD 60+ American Oncology Network Access Now 12 Utah Cancer Specialists Salt Lake City, UT 40+ Independent Access Now 13 Compass Oncology Portland, OR 40+ US Oncology Network Access Now 14 Willamette Valley Cancer Institute Eugene, OR 35+ US Oncology Network Access Now 15 Cancer Care Northwest Spokane, WA 30+ Independent Access Now 16 Northwest Medical Specialties Tacoma, WA 28+ American Oncology Network Access Now 17 Oncology Hematology Care (OHC) Cincinnati, OH 30+ American Oncology Network Access Now 18 Michiana Hematology Oncology Mishawaka, IN 25+ Independent Access Now 19 Cancer & Hematology Centers of Western Michigan Grand Rapids, MI 30+ Independent Access Now 20 Florida Cancer Affiliates Ocala, FL 25+ US Oncology Network Access Now Data Source: Accessed in March 2026. Access Now. How Many Oncology Physician Groups Are in the US? As of 2026, there are approximately 2,000+ oncology physician groups operating across the United States. These include: These groups range in size from small two-physician practices to nationwide networks with hundreds of oncologists. Many of them are part of larger purchasing organizations and clinical trial consortia, making them powerful players in product adoption decisions. Why Oncology Physician Groups Are a Prime Marketing Target 1. High Prescribing Authority Oncologists often control formularies for cancer drugs, biosimilars, and specialty therapies \u2014 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 \u2014 making them central touchpoints for products related to care coordination, EMRs, and diagnostic testing. 4. Influence on Guidelines and Research Many oncology groups participate in or lead clinical trials, giving them influence in shaping future treatment protocols. 5. Long-Term Patient Relationships Oncology patients typically require ongoing care over months or years. That translates into longer-term relationships between physician groups and the products they use or recommend. How to Market to Oncology Physician Groups Using Ampliz Healthcare Data Effective marketing to oncology physician groups requires: This is where Ampliz Healthcare Data Intelligence comes in. Here\u2019s how Ampliz helps you reach oncology groups: Comprehensive Database Access verified data of over 2,000 oncology groups and 15,000+ hematologists\/oncologists. Affiliation Insights See whether a group is part of US Oncology, OneOncology, or AON \u2014 critical for navigating group purchasing decisions. Detailed Contact Info Get direct emails, phone numbers, and LinkedIn profiles of decision-makers like Medical Directors, Procurement Heads, and Practice Managers. Advanced Filters Segment your target list by: Integration Ready Export data directly to your CRM or marketing automation platforms like Salesforce, HubSpot, and Marketo. Conclusion: How to Engage Top Oncology Physician Groups with Precision With over 2,000 oncology physician groups in the U.S., marketers face a vast \u2014 but complex \u2014 landscape. These groups are high-value targets due to their influence on treatment decisions, equipment purchases, and drug adoption. To successfully market your healthcare product or service to these groups, you need accurate, real-time, and segmented data. Ampliz Healthcare Data Intelligence empowers you to: Whether you\u2019re selling oncology-specific pharmaceuticals, infusion devices, EMR platforms, or diagnostics, Ampliz gives you the edge to market smarter and faster. FAQs 1. What is the largest oncology physician group in the US?The US Oncology Network is the largest, with over 1,500 affiliated oncologists across 20+ states. 2. How can I market to oncology physician groups?Use data platforms like Ampliz to access decision-makers\u2019 contact information and segment your outreach based on group size, affiliation, and geography. 3. Are most oncology groups hospital-owned?Not all \u2014 many are part of independent networks or national alliances like OneOncology or AON. 4. How often do oncology groups purchase new equipment<\/p>\n","protected":false},"author":13,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[151,2009],"tags":[],"class_list":["post-3688","post","type-post","status-publish","format-standard","hentry","category-physician-groups-by-speciality","category-us-physician-groups"],"_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":2,"href":"https:\/\/www.ampliz.com\/resources\/wp-json\/wp\/v2\/posts\/3688\/revisions"}],"predecessor-version":[{"id":5168,"href":"https:\/\/www.ampliz.com\/resources\/wp-json\/wp\/v2\/posts\/3688\/revisions\/5168"}],"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}]}}