Medicare Supplement Insurance provides 3 key benefits: 1) you can keep your existing doctors and health care providers without referrals, 2) you have coverage for life as long as premiums are paid on time, and 3) coverage is guaranteed during open enrollment periods without health questions. The document then discusses United of Omaha's Medicare Supplement plans, noting they offer competitive premiums, household discounts, and friendly customer service to help save time and money. United of Omaha has offered such plans since 1926 as a mutual company owned by policyholders.