The average annual premium for the most popular type of Medigap insurance is around $2,000. However, these premiums can range from $500 to $10,000 for the same exact coverage. No joke! And sometimes you may find there are some very specific coverages and exclusions for Medigap policies. In general, the more coverage you have the higher the premium you pay, but as you can see, the plans vary as much as seasonal fashion trends, so compare coverage and costs carefully.For help comparing Medigap policies, call your State Health Insurance Assistance Program (SHIP), which provides free counseling and education about Medicare programs and services.