Hello, I'm currently reviewing Med Supp and Plan D insurance options and would like opinions/feedback on which carrier(s) are easiest to work with - claim processing, customer service, overall best experience. My background: Diagnosed Oct 2023-Kappa Light Chain, ASCT May 2024, currently receiving Darzalex Faspro monthly and Lenalidomide 10mg 21/28. Medicare effective February 2026, female, no smoker, lives in IL - Will County. Thanks to all who respond!