The former owner of several physical therapy clinics in Greater Boston was arrested on healthcare fraud charges as he attempted to board an international flight at John F. Kennedy International Airport. Chang Goo Yoon, 59, a South Korean national who most recently resided in Waltham, was charged with healthcare fraud. According to the charging document, from 2009 to 2020, Yoon was the owner and operator of several physical therapy clinics in Allston, Waltham and Brookline. It is alleged that Yoon billed patients for non-existent physical therapy appointments. Specifically, Yoon allegedly billed patients for appointments that they canceled or never attended, including appointments while the patient was overseas. Yoon also billed claims using a former employee’s name and healthcare provider identifier even though she did not provide the claimed services. It is further alleged that Yoon billed patients for services on dates when he was not present at the clinic, but instead was at the Golden Nugget casino in Atlantic City, N.J. or the MGM Grand casino in Springfield, Mass.