Use a nationwide directory like MyMedicareBroker.com to find a Medicare broker...
https://wiki-site.win/index.php/How_to_Verify_a_Broker_Listing_When_the_Site_Says_%E2%80%9CLicensed%E2%80%9D
Use a nationwide directory like MyMedicareBroker.com to find a Medicare broker by state or county, then verify the broker’s NPN. Brokers may help with Medicare Supplement, Medicare Advantage, and Part D, so ask which options they cover.