Searching for the best secure horizons providers? Secure Horizons is a part of united health Care. It offers Medicare supplements, Advantage plans and Part D Drug coverage for Medicare subscribers. These plans are popular because of the variety of options available nationally. These plans are both affordable and beneficial. Once you have chosen a plan, you will need to decide if you would be canceling your current plan, that’s if you already have one. Upon cancellation, you will not be able to get coverage under it anymore. In most cases, you will also not be able to get it back if in case you change your mind in the future. But if you are someone who is getting Medicare for the first time, it should be fairly easy for you. A group of local contracted doctors and hospitals coordinate your care. Extra cost is quite minimal in this plan in comparison to others.