A NON O based entirely on medical reasons, but we are not calling it a medical visa....This reminds me of the OA / retirement Visa argument ;) ;) OK there is no medical visa, but there is a visa specifically for medical reasons....LOL....
Yes you can for sure (in Pattaya). As long as you can get a residency certificate. If you are a TOURIST and staying short term then an IDP is fine If you plan to stay long term in Thailand you need a Thai licence after 90 days. This is legal wise and insurance wise.