You cannot be dropped from a Medicare Advantage plan because of a medical condition. If a Medicare Advantage plan becomes unavailable or no longer serves your region, you may be dropped from it. If you do not make your payments within an agreed-upon grace period, you may be pulled from a Medicare Advantage plan. However, if you give proper notice, you can look for other coverage that fits your needs. In addition, some plans have a lifetime limit on how many times they will cover you. Generally, this is called "limiting benefits." For example, a plan might limit coverage to two times in any one year. If you get sick again after being dropped or if you become disabled again, you could lose your coverage. You should check the fine print of your policy to see what would happen if you were to be dropped too often. It's important to understand these limitations before you sign up for insurance so there aren't any unpleasant surprises if something happens down the road. If you have preexisting conditions and can't be excluded, then you need to select a plan that covers such conditions. For example, if you have diabetes, you should select a plan with diabetic care benefits. Make sure to ask about limits on benefits during the application process. Plans vary in how much they charge for certain services so it's important to know before you select anything what the costs are like for different procedures or medications.