[annapurna]

If you have a GP you work with regularly, you might even approach them to authorize the imaging.

It's even a real long shot but occasional imaging centers can handle self-pay and offer a discount for not having to file insurance. If you can find one that's willing to go that
route, you don't need a doctor to authorize the imaging to get insurance coverage.

You might even be able to find an overseas doctor whose website or standard list of instructions for a consultation requests imaging and use that together with the self-pay to get an imaging center who's willing to work with you to just get the work done. You don't necessarily need to tell the imaging center that you've not been in contact with the overseas doc yet but leave them to assume that you have.