25 largest health systems by physicians

Assessing a health system's size through its physician workforce can provide a more holistic view of its capacity and scope. 

This overview of the top U.S. health systems by total physicians is information that can be taken in combination with measurements of large health systems by the number of hospitals they operate and the number of beds they include.  

As a reference point to the counts below, UnitedHealth Group's Optum announced in November that it had added nearly 20,000 physicians in 2023 for a total that now nears 90,000 employed or affiliated physicians. 

The 25 health systems' physician, hospital and bed counts stem from the Compendium of U.S. Health Systems for 2022, released in December 2023, from the Agency for Healthcare Research and Quality. Systems are ranked below by total physicians, with the additional data points of hospital and bed counts, to provide a more complete picture. 

The physician count in the compendium comes from IQVIA OneKey data, which is collected through surveys. The total is aggregated at the health system level and includes all physicians (medical doctors and doctors of osteopathy) regardless of specialty who had attending, staff or treating affiliations with facilities in the system. 

Kaiser Permanente (Oakland, Calif.)
Physicians: 25,352
Hospitals: 41
Beds: 9,217

CommonSpirit Health (Chicago) 
Physicians: 15,019
Hospitals: 147
Beds: 17,107

HCA Healthcare (Nashville, Tenn.) 
Physicians: 14,232
Hospitals: 184
Beds: 37,478

University of California Health (Oakland) 
Physicians: 13,920
Hospitals: 10
Beds: 3,427

Providence (Renton, Wash.)
Physicians: 13,203
Hospitals: 54
Beds: 9,511

Trinity Health (Livonia, Mich.)
Physicians: 12,026
Hospitals: 102
Beds: 14,706

Northwell Health (New Hyde Park, N.Y.) 
Physicians: 12,000 (count self-reported to Becker's
Hospitals: 21
Beds: 5,287

The University of Texas System (Austin) 
Physicians: 11,466
Hospitals: 7
Beds: 1,640

Ascension Health (St. Louis) 
Physicians: 10,724
Hospitals: 119
Beds: 16,103

Advocate Health (Charlotte, N.C.)
Physicians: 10,307
Hospitals: 58
Beds: 10,528

Mass General Brigham (Boston)
Physicians: 9,127
Hospitals: 15
Beds: 2,715

Mayo Clinic Health System (Rochester, Minn.) 
Physicians: 7,792
Hospitals: 26
Beds: 2,758

Sutter Health (Sacramento, Calif.)
Physicians: 12,000
Hospitals: 27
Beds: 3,543

UPMC (Pittsburgh)
Physicians: 6,896
Hospitals: 34
Beds: 6,047

New York Presbyterian Healthcare System (New York City)
Physicians: 6,580
Hospitals: 8
Beds: 3,970

Tenet Healthcare (Dallas) 
Physicians: 6,514
Hospitals: 74
Beds: 12,690

Cleveland Clinic 
Physicians: 5,737
Hospitals: 20
Beds: 5,106

Mount Sinai Health System (New York City)
Physicians: 5,393
Hospitals: 5
Beds: 2,452

Beth Israel Lahey Health (Cambridge, Mass.) 
Physicians: 5,343
Hospitals: 10
Beds: 2,101

Prospect Medical Holdings (Los Angeles) 
Physicians: 5,002
Hospitals: 13
Beds: 1,944

Johns Hopkins Health System (Baltimore)
Physicians: 4,711
Hospitals: 6
Beds: 2,316

BJC Healthcare (St. Louis) 
Physicians: 4,470
Hospitals: 16
Beds: 3,166

University of Pennsylvania Health System (Philadelphia)
Physicians: 4,198
Hospitals: 9
Beds: 2,915

Corewell Health (Grand Rapids, Mich.) 
Physicians: 4,198
Hospitals: 24
Beds: 4,689

UW Medicine (Seattle) 
Physicians: 4,197
Hospitals: 4
Beds: 1,229

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