5. What data points are important when targeting IPAs?<\/strong><\/h3>\n\n\n\nKey data includes physician count, specialties, location, revenue, and decision-maker contact details.<\/p>\n","protected":false},"excerpt":{"rendered":"
Last updated on May 1st, 2026 Introduction In today\u2019s rapidly evolving U.S. healthcare ecosystem, Independent Physician Associations (IPAs) play a critical role in delivering patient care while maintaining physician autonomy. These organizations represent thousands of independent physicians across multiple states, making them high-value targets for healthcare marketers, pharma companies, and medical device firms. However, identifying and reaching the largest independent physician associations by state is not straightforward due to fragmented data, lack of centralized directories, and constantly changing affiliations. This guide provides a complete breakdown of IPAs, including what they are, why they matter, a state-wise list of top IPAs, and how to find and target them effectively. What is an Independent Physician Association (IPA)? An Independent Physician Association (IPA) is a network of independent doctors or small practices that collaborate under a unified entity while maintaining ownership of their practices. These groups typically: Unlike hospital-employed groups, IPAs allow physicians to remain independent while benefiting from scale and shared resources. Why Independent Physician Associations Matter? Independent Physician Associations are increasingly influential in healthcare due to: 1. Strong Market Influence Large IPAs control significant patient populations and referral networks, making them key decision-makers in healthcare purchasing. 2. First Point of Patient Care Many IPAs include primary care physicians, often serving as the entry point into the healthcare system. 3. Ideal Targets for Healthcare Marketing For B2B healthcare companies, IPAs provide: Better ROI on outreach campaigns Access to multiple physicians through one organization Faster decision-making cycles List of Top 15 Largest Independent Physician Groups in the US by State Below is a curated list of the largest independent physician associations in the US, based on physician count and regional influence: Rank Physician Group State Number of Physicians Data Access 1 HealthCare Partners IPA New York (NY) 4,891 Signup Now 2 Santa Clara County IPA California (CA) 857 Signup Now 3 IPA of Nassau & Suffolk Counties New York (NY) 799 Signup Now 4 Patient Physician Network IPA Texas (TX) 519 Signup Now 5 Mount Auburn Cambridge IPA Massachusetts (MA) 367 Signup Now 6 Torrance Memorial IPA Medical Group California (CA) 352 Signup Now 7 Allcare IPA California (CA) 277 Signup Now 8 Valley Care IPA California (CA) 238 Signup Now 9 St. Vincent IPA Medical Group California (CA) 183 Signup Now 10 Lakewood IPA California (CA) 145 Signup Now 11 Greater Tri Cities IPA Medical Group California (CA) 130 Signup Now 12 Independent Emergency Physicians Michigan (MI) 109 Signup Now 13 Independent Hospitalists Arizona (AZ) 96 Signup Now 14 Santa Barbara Select IPA California (CA) 87 Signup Now 15 Allied Pacific IPA Healthcare City California (CA) 22 Signup Now State-Wise Insights on IPAs Some states dominate the IPA landscape due to population density and healthcare infrastructure: States with large physician networks provide better opportunities for targeted healthcare marketing and partnerships. Challenges in Finding IPA Data Finding accurate IPA data is difficult due to: Manual research often results in incomplete or outdated contact information, reducing campaign effectiveness. How to Find Largest Independent Physician Associations by State 1. Use Healthcare Data Platforms Platforms like Ampliz provide: 2. Apply Advanced Filters Key filters to use: 3. Segment for Better Targeting Segment IPAs based on: 4. Build Custom Prospect Lists Create tailored lists of: This ensures high-conversion outreach campaigns. Conclusion Ampliz Healthcare Intelligence emerges as an indispensable tool for healthcare marketing professionals seeking to connect with Independent Physicians Group doctors. By providing access to a comprehensive and accurate database, advanced search filters, and valuable data enrichment, Ampliz streamlines the process of finding contact information. By effectively utilizing this platform, you can enhance your outreach efforts, build stronger relationships with IPG doctors, and ultimately achieve your marketing objectives. FAQs 1. What is an Independent Physician Association (IPA)? An IPA is a network of independent physicians who collaborate for contracting, administration, and patient care coordination while maintaining practice ownership. 2. Why are IPAs important in healthcare marketing? They provide access to large physician networks, enabling efficient targeting and better ROI for healthcare campaigns. 3. Which state has the most IPAs? California leads in IPA concentration, followed by New York and Texas. 4. How can I find IPA contact data? You can use healthcare data platforms like Ampliz that provide verified and updated physician and IPA databases. 5. What data points are important when targeting IPAs? Key data includes physician count, specialties, location, revenue, and decision-maker contact details.<\/p>\n","protected":false},"author":13,"featured_media":5717,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2009],"tags":[],"class_list":["post-3407","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-us-physician-groups"],"_links":{"self":[{"href":"https:\/\/www.ampliz.com\/resources\/wp-json\/wp\/v2\/posts\/3407","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=3407"}],"version-history":[{"count":3,"href":"https:\/\/www.ampliz.com\/resources\/wp-json\/wp\/v2\/posts\/3407\/revisions"}],"predecessor-version":[{"id":5718,"href":"https:\/\/www.ampliz.com\/resources\/wp-json\/wp\/v2\/posts\/3407\/revisions\/5718"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ampliz.com\/resources\/wp-json\/wp\/v2\/media\/5717"}],"wp:attachment":[{"href":"https:\/\/www.ampliz.com\/resources\/wp-json\/wp\/v2\/media?parent=3407"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ampliz.com\/resources\/wp-json\/wp\/v2\/categories?post=3407"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ampliz.com\/resources\/wp-json\/wp\/v2\/tags?post=3407"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}