Emma Kolendo (asker) Sep 21, 2021:

Thank you so much Emily, you've solved it! I will use 'prescription type' and thanks also for providing answers about the other abbreviations.
If you want to post this as an answer I will mark it correct.

Samuël Buysschaert Sep 20, 2021:

En complément,

Nature d'expression d'ordonnance/ Code de nature d'ordonnance
Document .XLS
NS,NV,RS,RV
https://www.ramq.gouv.qc.ca/fr/media/1116

Emily Gilby Sep 20, 2021:

Going by these ProZ entries, perhaps you could translate it as "prescription type"?

Emily Gilby Sep 20, 2021:

Here's another helpful ProZ entry: https://www.proz.com/kudoz/french-to-english/medical-pharmac...

Laurel Clausen Sep 20, 2021:

Some clues available in this discussion of “RS”: https://www.proz.com/kudoz/french-to-english/medical-general...

Drmanu49 Sep 20, 2021:

https://www.allacronyms.com/ATT/medical/3

Emily Gilby Sep 20, 2021:

Thanks Emma, that's a tricky one. In that case I can only suggest to ask the client I'm afraid =/

Emma Kolendo (asker) Sep 20, 2021:

Hi Emily. Thanks for this. Yes, I thought the same thing! But there is a separate column for "Medecin" + the name, so it can't be that.
Sorry, there isn't much more context, v frustrating!
The headings in full read:
Date/No Rx/Medicament/Att./Posologie/Medecin/Ren a donner

Emily Gilby Sep 20, 2021:

Could it be short for "attention"? Are the letters perhaps the doctors' initials? I'm just throwing out a few guesses as it's hard to be sure without much context. Could you provide more information on the record at all?