If you don't use a provider, you can hide the provider and remove it from the 'Provider' field in the Plan Summary step of the various recommendation sections by unchecking Show. This will help to make the list of providers that do show more manageable and relevant for you (and your users).

If you are an administrator of a Company Plan or Group Plan this will also remove the provider from both the Provider Library and the 'Provider' field for your account users or any accounts linked to your group.