Four individuals, including two doctors, a pharmacist who had previously lost his license and been excluded from participating in the Medicaid and Medicare programs and a pharmacy owner have been charged for their participation in schemes in which the Medicare and Medicaid programs were fraudulently billed more than $17 million. A fifth individual, a registered nurse, pleaded guilty to possession of fentanyl that he stole from his employer, a hospital on Long Island. The charges filed in federal court in Brooklyn and Central Islip are part of a coordinated healthcare fraud enforcement action across seven federal districts in the northeast United States, led by the Medicare Fraud Strike Force, that resulted in criminal charges against 48 defendants for their alleged participation in healthcare fraud schemes involving more than $800 million in false and fraudulent claims.