@Handy *****
, You cannot get a Non-O-A visa inside the country so anything that is listed at a thai consulate as a requirement is not needed. :/ Unless you're going to slog back to the USA, stop thinking about a Non-O-A visa, because you cant' get them in thailand.
You would be getting a yearly extension based on being over 50 (retirement) at the thai immigration office.
It doesn't require a medical certificate or a police background check.
It requires you bank 800K baht in a thai bank in an account in your name only for the requisite time or the letter from your consulate stating you get 65K baht a month in income. OR a combination of the two that equals 800K baht for the year.