Medicare Supplement policies are also known as Medigap policies. Original Medicare doesn't cover everything and can leave you with out of pocket costs. These policies carry its own premium depending upon the plan you choose. As the name suggests, these policies supplement out of pocket expenses that are your responsibility when you have Original Medicare.  

With Medicare Supplement plans, you can see any Medicare doctor without worrying whether a doctor is in or out of network and you can use your plan outside of Washington when you travel. Medicare Supplement plans should be reviewed with you when you inquire about Medicare Advantage plans so that you can determine which option is the best one for you. Private insurers in the State of Washington offer Medicare Supplement plans.