Medicare’s annual enrollment period begins Oct. 15 and extends through Dec. 7. During this period, existing Medicare beneficiaries can elect to change their insurance coverage for 2023 or, if they do nothing, keep the coverage they have. Don’t assume your current plan will be the best option next year. Premiums and copays can change. Drugs covered one year may be dropped the next, or put in a more expensive coverage category. Health providers now in your Medicare Advantage plan network might not be in it next year.