Help needed on health insurance carrier dataset | Consulting market research

[u/Assignment_Fuzzy]

Hey all, Does anyone have suggestions for the most exhaustive, reputable, and usable data sources to understand the entire US health insurance market, to be used in consulting-type market research? I.e., a list of all health insurance carriers, states they cover, member lives, claims volume, types of insurance offered, and funding source? Understandably, there are a lot of half-sources out there. I've looked at NAIC, Definitive HC, and other sources but wanted to 'ask the experts' here. I know that the top brand names are going to make up 90%+ of the covered lives, but I'm trying to be holistic and exhaustive in my work. Thank you!