In today’s data-driven healthcare market, understanding hospital affiliation data is more important than ever. Hospital affiliation data refers to the relationship between physicians, hospitals, and healthcare networks across the United States. This data provides insights into which doctors are affiliated with which hospitals, whether they belong to a specific healthcare system, how patients are referred within these networks, and how care is coordinated across facilities.
For healthcare marketers, medical device companies, pharmaceutical sales teams, and healthcare service providers, this data is invaluable. Why? Because hospital affiliation data unlocks precision in targeting the right stakeholders. Instead of sending generic outreach to thousands of hospitals, businesses can now reach specific decision-makers—from affiliated physicians to hospital administrators—based on accurate, real-time data.
This blog provides a comprehensive state-wise breakdown of hospital affiliation data in the USA, highlights the top 20 state-wise hospital affiliation networks, and explains why this data is crucial for your marketing strategy. Finally, we’ll explore how to reach these hospitals and affiliated networks with tools like Ampliz Healthcare Data Intelligence.
What is Hospital Affiliation Data?
Hospital affiliation data describes the professional and organizational connections between:
- Physicians and hospitals
- Hospitals and healthcare systems
- Hospitals and medical schools
- Specialty clinics and larger hospital networks
For example:
- A cardiologist in New York may be affiliated with Mount Sinai Hospital and also practice at New York-Presbyterian.
- A community hospital in Texas may be affiliated with Baylor Scott & White Health, giving it access to specialized medical programs.
This data is not just about who works where; it’s about understanding patient referral flows, care delivery patterns, and organizational decision-making.
Why Does Hospital Affiliation Data Matter?
Hospital affiliation data has wide-reaching implications across healthcare and business:
1. For Healthcare Providers
- Better coordination of care across multiple hospitals and physicians.
- Improved referral management and patient outcomes.
2. For Pharmaceutical & Medical Device Companies
- Identify the right hospitals and affiliated physicians prescribing or recommending specific treatments.
- Understand buying power within a hospital system.
- Reduce wasted marketing spend by targeting decision-makers.
3. For Healthcare Marketers
- Segment audiences based on hospital systems and affiliations.
- Personalize outreach to physicians based on their network connections.
4. For Payers and Insurance Companies
- Analyze provider networks and coverage gaps.
- Assess healthcare utilization by hospital system.
5. For Patients
- Transparency on which hospitals their doctors are affiliated with.
- Easier access to specialty care within networks.
State-Wise Hospital Affiliation Data in the USA
The U.S. has one of the largest and most complex healthcare systems in the world, with over 6,100 hospitals and 950,000+ affiliated physicians. Every state has its own network of affiliations, ranging from small community hospitals linked to regional systems, to massive integrated delivery networks (IDNs) like Kaiser Permanente, HCA Healthcare, Ascension, and CommonSpirit Health.
Here’s a look at hospital affiliation data by state (estimated numbers):
- California – 440+ hospitals, heavily driven by Kaiser Permanente, Sutter Health, Dignity Health
- Texas – 630+ hospitals, affiliations led by Baylor Scott & White, HCA, CHRISTUS Health
- Florida – 325+ hospitals, strong presence of AdventHealth, HCA, Cleveland Clinic
- New York – 210+ hospitals, affiliations with NYU Langone, Mount Sinai, Northwell Health
- Pennsylvania – 240+ hospitals, affiliations with UPMC, Penn Medicine, Geisinger
- Illinois – 190+ hospitals, major systems include Advocate Aurora, Northwestern, OSF
- Ohio – 220+ hospitals, affiliations with Cleveland Clinic, OhioHealth, University Hospitals
- Michigan – 140+ hospitals, Henry Ford Health, Spectrum Health, Trinity Health
- Massachusetts – 80+ hospitals, affiliations with Mass General Brigham, Beth Israel
- Georgia – 170+ hospitals, Wellstar, Piedmont, Emory Healthcare dominate
- Washington – 100+ hospitals, affiliations with Providence, UW Medicine, MultiCare
- North Carolina – 130+ hospitals, Atrium Health, Novant Health, Duke Health
- Virginia – 110+ hospitals, Sentara Healthcare, Inova, HCA Virginia
- Tennessee – 160+ hospitals, HCA TriStar, Vanderbilt Health, Baptist Memorial
- Arizona – 110+ hospitals, Banner Health, HonorHealth, Dignity Health
- Colorado – 110+ hospitals, UCHealth, Centura Health, Kaiser Permanente
- New Jersey – 80+ hospitals, RWJBarnabas, Hackensack Meridian, Atlantic Health
- Maryland – 60+ hospitals, Johns Hopkins, MedStar, University of Maryland
- Minnesota – 130+ hospitals, Mayo Clinic, Fairview, Allina Health
- Wisconsin – 130+ hospitals, Advocate Aurora, Froedtert, SSM Health
Top 20 USA State-Wise Hospital Affiliation Networks
| Rank | State | Major Affiliation Networks | Estimated Number of Affiliated Hospitals | Data Set |
|---|---|---|---|---|
| 1 | California | Kaiser Permanente, Sutter Health, Dignity Health | 440+ | Access Now |
| 2 | Texas | Baylor Scott & White, HCA, CHRISTUS Health | 630+ | Access Now |
| 3 | Florida | AdventHealth, HCA, Cleveland Clinic Florida | 325+ | Access Now |
| 4 | New York | Mount Sinai, NYU Langone, Northwell Health | 210+ | Access Now |
| 5 | Pennsylvania | UPMC, Penn Medicine, Geisinger | 240+ | Access Now |
| 6 | Illinois | Advocate Aurora, Northwestern, OSF | 190+ | Access Now |
| 7 | Ohio | Cleveland Clinic, OhioHealth, University Hospitals | 220+ | Access Now |
| 8 | Michigan | Henry Ford Health, Spectrum, Trinity Health | 140+ | Access Now |
| 9 | Massachusetts | Mass General Brigham, Beth Israel | 80+ | Access Now |
| 10 | Georgia | Wellstar, Piedmont, Emory | 170+ | Access Now |
| 11 | Washington | Providence, UW Medicine, MultiCare | 100+ | Access Now |
| 12 | North Carolina | Atrium Health, Novant, Duke Health | 130+ | Access Now |
| 13 | Virginia | Sentara, Inova, HCA Virginia | 110+ | Access Now |
| 14 | Tennessee | HCA TriStar, Vanderbilt, Baptist Memorial | 160+ | Access Now |
| 15 | Arizona | Banner Health, HonorHealth, Dignity Health | 110+ | Access Now |
| 16 | Colorado | UCHealth, Centura, Kaiser Permanente | 110+ | Access Now |
| 17 | New Jersey | RWJBarnabas, Hackensack Meridian, Atlantic Health | 80+ | Access Now |
| 18 | Maryland | Johns Hopkins, MedStar, UMMS | 60+ | Access Now |
| 19 | Minnesota | Mayo Clinic, Allina, Fairview | 130+ | Access Now |
| 20 | Wisconsin | Advocate Aurora, Froedtert, SSM Health | 130+ | Access Now |
How Many State-Wise Hospital Affiliations Exist in the USA?
Currently, there are over 6,100 hospitals across all 50 U.S. states, and 950,000+ physicians affiliated with these hospitals through direct employment, admitting privileges, or clinical partnerships. On average, a physician is affiliated with 2–3 hospitals, meaning the number of affiliation connections nationwide exceeds 2 million relationships.
This massive web of affiliations makes hospital data platforms crucial for healthcare businesses to navigate.
Why Marketing to Hospital Affiliations is Important
Marketing to individual hospitals is no longer enough. With the rise of healthcare consolidation, many hospitals are now part of integrated delivery networks (IDNs). This means:
- A single marketing campaign can influence dozens of hospitals within one affiliation.
- Decision-making power is often centralized at the health system level.
- Physicians and specialists within the same network often adopt common purchasing and prescribing patterns.
By targeting hospital affiliations instead of standalone hospitals, businesses can maximize ROI and penetrate networks more effectively.
How to Reach Hospital Affiliations with Ampliz
Ampliz Healthcare Data Intelligence is designed to help you navigate and leverage hospital affiliation data. With Ampliz, you can:
- Access real-time hospital & physician affiliation data.
- Identify decision-makers, executives, and affiliated physicians.
- Filter by state, specialty, hospital system, and more.
- Enrich your marketing database with verified contact information.
- Run precise, targeted campaigns instead of broad outreach.
In short, Ampliz helps you shorten sales cycles, boost engagement, and maximize ROI.
Conclusion
Hospital affiliation data is the key to understanding the U.S. healthcare ecosystem. With 6,100+ hospitals and nearly 1 million physicians, affiliations dictate how care is delivered, how referrals happen, and how purchasing decisions are made.
By leveraging state-wise hospital affiliation data, businesses can stop wasting time on generic outreach and start engaging with the right hospital networks and decision-makers.
Using Ampliz Healthcare Data Intelligence, you can access this critical data, build smarter marketing strategies, and ensure that your healthcare products and services reach the right audience at the right time.
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