Use a nationwide directory like MyMedicareBroker.com to search for Medicare...

https://judahsuniqueop-eds.lumenforgex.com/posts/multi-state-license-tracking-tools-why-brokers-care

Use a nationwide directory like MyMedicareBroker.com to search for Medicare brokers by state or county. Verify a broker’s NPN, and check whether they offer help with Medicare Supplement, Medicare Advantage, or Part D.