OptumHealth and an investment consortium led by private equity firm Summit Partners (Summit) recently purchased a controlling interest in Sound Inpatient Physicians Holdings, LLC (Sound) from Fresenius Medical Care. The transaction is valued at $2.15 billion. Sound is a physician staffing organization providing services across the acute episode of care through emergency medicine, critical care, hospital medicine, transitional care, and advisory services. In 2017, Sound generated revenues of around $1.45 billion, with 3,500 employees working in 35 states. Fresenius Medical Care became a majority shareholder in Sound in 2014. During the same year, Sound expanded its footprint . . .