PITTSBURGH-(WPXI) — A Pittsburgh-area doctor is facing federal charges, accused of unlawfully distributing opioids and performing unnecessary injections for profit. According to the indictment, Dr. John Keun Sang Lee, 78, of Peters Township, spent years prescribing oxycodone, fentanyl and other painkillers “not for a legitimate medical purpose.” He is also accused of performing “repetitive and medically unnecessary injections on patients, in many cases for several years and, at times, directly against the patient’s express wishes, in order to increase revenue.” The federal documents further allege he defrauded Medicare and Medicaid. Dr. Lee is the owner of Jefferson Pain and Rehabilitation Center, which has a main office on Clairton Boulevard in Whitehall. A biography on his website states he is also a staff member at Jefferson Hospital and UPMC McKeesport. A UPMC spokesperson stated that Dr. Lee is not employed by UPMC and does not work at any of its sites. Dr. Lee has entered a “not guilty” plea and was released on a $20,000 unsecured bond. Despite the objection from federal prosecutors, a judge is reportedly allowing Dr. Lee to continue practicing and prescribing until May 28, providing time for his patients to transition to another practice, officials said. During that time, Dr. Lee is required to report to the U.S. Attorney’s Office on a weekly basis, before surrendering his DEA license on May 28.