Yeah, I’d prefer “MD, MCHM”. It’s much shorter and easier to write. Perhaps this is one reason why people proceed to a PhD… because that supersedes the weird “MCHealth&M” after their names and they don’t have to write that anymore. [half-joking here] For reference, here is the university policy that governs those post-nominals: https://policies.anu.edu.au/ppl/document/ANUP_006804