What are the insurance requirements for a Non-OA visa in Thailand, especially for seniors looking for coverage?

A recent visit to the Chiang Mai immigration office revealed that applicants for a Non-OA visa must provide insurance from one of 14 specifically listed Thai companies. This regulation poses significant challenges for older expats, particularly those over 70, like a 77-year-old Irish neighbor, who may find it difficult and costly to obtain such insurance. Several commenters shared their experiences and insurance providers, noting that some companies, like Navakij, might cover people up to 80 but not beyond. It was also mentioned that those on a Non-O visa do not currently require insurance, leading to discussions about potentially switching to that visa type for easier insurance options.