@naturegirl5 Right Helen, each category of plans are the same coverage. They have charts for billing that say what the premiums will be as your age increases for comparison between companies. Most get more expensive each year as a person becomes older. For clarification in my prior post, an F or G plan isn't mandatory. It is a supplement (Medigap) insurance plan that must be purchased that will pay what is left over that Traditional Medicare does not pay. Medicare Part A is at no charge to me because I have paid taxes toward that with employment. Medicare Part B will have a monthly premium cost to me, and when I start receiving Social Security payments, the premium will be an automatic deduction from the social security payment. Until that time, I will need to make the payments for Medicare Part B.