Jose wrote:
Open your policy book, look at the definition of "policy territory". If
it says "Mexico" you're good to go.

I don't think this is sufficient. IN ADDITION to insurance that covers
you from here in Mexico, I have read that Mexican law requires insurance
underwritten by a Mexican company which also covers you.

Despite what you have read that requirement was removed more than 4
years ago and we have all been flying down to Mexico without hassle
since.
-Robert