Here are six major physician group acquisitions to know:
1. Amazon completed its $3.9 billion acquisition of virtual and in-person primary care company One Medical. The acquisition will give Amazon access to more than 200 brick-and-mortar physicians offices, along with roughly 815,000 One Medical members. Amazon will also have access to One Medical primary care clinics in 25 U.S. markets.
2. Optum purchased Middletown, N.Y.-based Crystal Run Healthcare, a multispecialty physician group with over 400 providers across more than 30 locations.
3. Optum acquired Houston-based Kelsey-Seybold for around $2 billion. Kelsey-Seybold is a multispecialty physician group with cancer and women's health centers, two ASCs and a sleep center. The group is building another ASC on a campus that will eventually have space for 82 providers.
4. Optum received clearance to buy Auburndale, Mass.-based, 30-location physician organization Atrius Health, which includes 30 practice locations and 645 physicians and primary care providers, for $236 million.
5. CVS Health completed its $10.6 billion acquisition of primary care company Oak Street Health.
6. CVS Health completed its $8 billion acquisition of Signify Health, adding more than 10,000 clinicians to its network.