Tenet Healthcare has agreed to acquire Vanguard Health Systems for roughly $1.8 billion in a deal that will put Tenet into new markets.

Based in Nashville, Vanguard owns and operates 28 acute care hospitals with 7,081 licensed beds in San Antonio, Harlingen and Brownsville in Texas, metropolitan Detroit, metropolitan Phoenix, metropolitan Chicago and in Massachusetts. The company also owns managed health plans in Chicago, Detroit, Harlingen and Phoenix, and it has two surgery centers in Orange County in California.

Tenet, based in Dallas, has 49 hospitals with a total of 13,180 licensed beds and 122 outpatient centers. It also owns Conifer Health Solutions.