Compared to other medical fields like dentistry and dermatology, private equity involvement in orthopedic practices has been relatively small. But that’s been changing over the past few years and is likely to continue to grow moving forward.

On April 23 a group led by private equity firm TPG agreed to acquire OneOncology, the nation’s largest independent community oncology network, in a deal valued at $2.1 billion. AmerisourceBergen, the big drug wholesaler, is buying a minority stake in the firm; OneOncology’s affiliated practices, physicians, and management team will also retain a minority interest.