2024 Evidence of Coverage for UnitedHealthcare® Group Medicare Advantage PEBB Balance (PPO) Chapter 10: Ending your membership in the plan 239 What should you do if this happens? If you feel that you are being asked to leave our plan because of a health-related reason, call Medicare at 1-800-MEDICARE (1-800-633-4227) 24 hours a day, 7 days a week (TTY 1-877-486-2048). Section 4.3 You have the right to make a complaint if we end your membership in our plan If we end your membership in our plan, we must tell you our reasons in writing for ending your membership. We must also explain how you can file a grievance or make a complaint about our decision to end your membership.