The following list highlights the top Integrated Delivery Networks (IDNs) by number of affiliated physician groups. A physician group is constituted by one or more physicians operating as an organization to deliver care.  In order for an organization to be placed under a network, Definitive Healthcare requires that the IDN have ownership or operational control over the group. 

With 42 affiliated physician groups, Wills-Knighton Health System—a Louisiana-based IDN—has the greatest number of reported in-network physician groups.  The states appearing the most frequently as IDN headquarters were Pennsylvania and Tennessee, each with five networks represented. Due to numerous ties, the top 23 IDNs are represented in the list below. 

Top IDNs by Physician Group Membership

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Network NameDefinitive IDStateAffiliated Physician GroupsNet Patient RevenueExplore This Dataset
1Willis-Knighton Health System7091LA42$1,057,835,074.00Explore This Profile
2Saint Francis Healthcare System992190MO36$527,267,909.00Explore This Profile
3Novant Health4736NC27$3,746,688,899.00Explore This Profile
4University of Pittsburgh Medical Center6448PA26$8,814,665,418.00Explore This Profile
5Community Health Systems542233TN25$10,803,609,740.00Explore This Profile
6Allegheny Health Network7155PA24$2,541,073,782.00Explore This Profile
7HCA East Florida Division780654FL20$3,385,979,772.00Explore This Profile
7HCA Healthcare4710TN20$43,736,535,205.00Explore This Profile
9Baptist Health South Florida7010FL18$3,115,809,504.00Explore This Profile
9Dignity Health4698CA18$11,716,357,682.00Explore This Profile
11Baylor Scott & White Health577357TX17$7,093,830,295.00Explore This Profile
12Jefferson Health7210PA16$3,739,470,428.00Explore This Profile
12LifePoint Health7004TN16$8,135,145,521.00Explore This Profile
12UPMC Pinnacle550155PA16$1,512,010,615.00Explore This Profile
15Acadia Healthcare7230TN15$857,151,639.00Explore This Profile
15HCA Continental Division780649CO15$2,636,549,608.00Explore This Profile
17HCA West Florida Division780653FL14$2,856,763,352.00Explore This Profile
18Adventist Health7053CA13$4,230,354,325.00Explore This Profile
18Baptist Health (Jacksonville FL)4699FL13$1,424,057,214.00Explore This Profile
18Universal Health Services7055PA13$9,411,099,588.00Explore This Profile
21Atrium Health4697NC12$7,404,799,037.00Explore This Profile
21Duke LifePoint Healthcare541933TN12$1,491,003,301.00Explore This Profile
21HCA Medical City Healthcare780650TX12$3,138,212,353.00Explore This Profile

Fig 1. Data from Definitive Healthcare Hospitals & IDNs Database; affiliation data is proprietary to Definitive Healthcare.