or. The U.S. Department of Health and Human Services – Office of the Inspector General. Provider fraud or abuse in a Medicare Advantage Plan or a Medicare drug plan (including a fraudulent claim) 1-800-MEDICARE (1-800-633-4227) or. The Investigations Medicare Drug Integrity Contractor. (I-MEDIC) at 1-877-7SAFERX (1-877-772-3379), or by US mail:.