What are the Largest Integrated Delivery Networks (IDNs) in the U.S.?

What are the Largest Integrated Delivery Networks (IDNs) in the U.S.?


Integrated Delivery Networks (IDNs) have transformed the U.S. healthcare landscape, offering comprehensive care through a network of interconnected services. These IDNs not only focus on patient care but also strive to enhance operational efficiency and cost-effectiveness. In this article, we delve into some of the largest IDNs in the U.S., highlighting their size, reach, and impact through key statistics.

1. Kaiser Permanente

Size and Scope: Kaiser Permanente is a titan in the IDN sector, serving over 12 million members. It operates 39 hospitals and over 700 medical offices, with a workforce of approximately 217,000 employees, including over 23,000 physicians.

Impact: Kaiser is known for its pioneering electronic health records system and an integrated care model that has been linked to improved patient outcomes and enhanced preventive care services.

2. HCA Healthcare

Size and Scope: HCA Healthcare’s network includes more than 180 hospitals and 2,000 sites of care in 21 states, employing around 275,000 people.

Impact: Renowned for its extensive services, HCA has a significant presence in emergency care, performing over 9 million emergency visits annually. Its focus on technology has led to advancements in patient care and operational efficiency.

3. Ascension Health

Size and Scope: As one of the leading nonprofit health systems, Ascension Health operates more than 2,600 sites of care, including 151 hospitals, across 19 states and the District of Columbia.

Impact: Ascension provides care for millions each year, emphasizing personalized, compassionate services, especially in underserved communities. It is also a leader in telehealth services, offering virtual care to numerous patients.

4. CommonSpirit Health

Size and Scope: CommonSpirit Health, a merger of Dignity Health and Catholic Health Initiatives, operates in 21 states with over 1,000 care sites and 137 hospitals. It employs around 150,000 staff and 25,000 physicians and advanced practice clinicians.

Impact: This IDN focuses on patient-centered care, community health, and innovative healthcare solutions, including digital health technologies and community-based programs.

5. Trinity Health

Size and Scope: Trinity Health operates 92 hospitals and 120 continuing care locations across 22 states. With a workforce of approximately 125,000 employees, including 7,500 physicians and clinicians, it serves communities with diverse healthcare needs.

Impact: Trinity Health is dedicated to delivering high-quality, people-centered care. It places a strong emphasis on community involvement and has initiatives targeting senior care, behavioral health, and social determinants of health.


These large IDNs represent just a portion of the complex and diverse U.S. healthcare system. Their significant reach and impact reflect the growing trend of integrating healthcare services to improve patient outcomes, reduce costs, and enhance overall care quality. As the healthcare landscape continues to evolve, these IDNs will likely play a crucial role in shaping the future of healthcare delivery in the United States.

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