In recent years, the leadership of Advanced Diagnostic Imaging (ADI) noticed that its market of Nashville, Tennessee, was experiencing an increasingly common trend. Chad Calendine, MD, president of ADI and CMO of Optimal Radiology Partners (ORP), says, “The national partnership we formed last year with ORP validated our observations that in many markets, health systems have begun—in earnest—to employ their referral base. As health systems employ those physicians, you can be in jeopardy of having your referral base hired away. It’s a well-known vulnerability for radiology practices and imaging-center owners, but options for addressing the problem can be limited.”