If you are a physician, medical practice owner, health care executive, pharmacist, therapist, home health provider, or other licensed professional who has been contacted by the FBI, HHS-OIG, DOJ, or another federal agency, it is important to take the situation seriously. Many federal health care fraud cases begin long before criminal charges are filed. A provider may first receive a subpoena, a request for records, a target letter, notice of a Medicare or Medicaid investigation, or a visit from federal agents. What you do in the early stages can significantly affect the direction of the case.