 The Medicare annual enrollment period allows you to shop for plans that may include your preferred doctors and specialists. Call 800-691-9408 and compare different plans available in your area. Take the time to review your coverage and make any necessary changes. Don't wait. Act now. Call 800-691-9408. That's 800-691-9408. Yes, Medicare is powered by CTI Media, non-government entity, not affiliated or endorsed by any government agency.