As of April 19th, 2018, we have updated our Registration and Sign in process by introducing HealthSafe ID. If you have already created a Healthsafe ID on another UnitedHealthcare website such as OptumRx, you can use the same username and password to Sign in to your online account for your Medicare plan. If not, Sign in with your current username and password, and follow the steps to create a new HealthSafe ID.