Earlier quoted context omitted.
That's a particularly strange kind of overthinking, implicitly acknowledging the medical field is complex enough to consult a professional, and yet thinking something as common and (relatively) simple as interpreting left/right from patient descriptions hasn't already been considered. That's before even getting into the assumption of face to face orientation over a phone... is that in virtual terms, or in terms of ab…
As I said elsewhere, but I think it's worth repeating here - In an effort to avoid ambiguity, I always talk to my doctor in terms of "driver's side" and "passenger side" - thus adopting the maritime approach, but in more common terms.
Really though, just use _your_ left and right as most people do, because as has been mentioned, the standard is for doctors to refer to and visualise left and right from the patients perspective - so every time you do something different they have to transform, translate or clarify which increases chance of mistakes.