To report Medicaid fraud, contact the Nebraska Medicaid Fraud Hotline toll-free at 1-800-727-6432, or send an email to ago.medicaid.fraud@nebraska.gov. You may also call MCNA Dental's Fraud Hotline toll-free at 1-855-392-6262. To complete a Medicaid Fraud and Patient Abuse Complaint Form online, please go to https://ago.nebraska.gov..