Representation documentation for grievance requests made by someone other than enrollee:
Upload documentation showing the authority to represent the enrollee (a completed Appointment of Representation Form CMS-1696 or a written equivalent). For more information on appointing a representative, contact the plan. You can also contact 1-800-MEDICARE (1-800-633-4227), 24 hours a day, 7 days a week. TTY/TTD users can call 1-877-486-2048.