Daryo Mar 18, 2020:

"contracted" sounds right.

"commissioned" by ... this insurance would also make sense.

When the NHS is "commissioning" services from hospitals (including from private hospitals) that looks very much like these "conventions".

Germaine Mar 17, 2020:

Convention: En France, contrat conclu entre un organisme de sécurité sociale d'une part et, d'autre part, un établissement de soins ou de prévention public ou privé, un membre d'une profession de santé (convention individuelle) ou une organisation syndicale départementale (convention départementale) ou nationale (convention nationale) des professions de santé... L'adjectif conventionné (en anglais : agreed ou contracted), par exemple dans médecin conventionné, établissement conventionné ou clinique conventionnée, dérive du terme convention au sens présenté ici.
http://gdt.oqlf.gouv.qc.ca/ficheOqlf.aspx?Id_Fiche=8448372
Voir aussi: http://gdt.oqlf.gouv.qc.ca/ficheOqlf.aspx?Id_Fiche=17583221

Tony M Mar 17, 2020:

@ S/T I didn't make a suggestion simply because I don't know for sure, and I don't like making misleading stabs in the dark.
The trouble is, this concept doesn't really exist in the UK in the same way (I don't know if it does in the US), and it is hard to find a concise translation without lengthy explanations.
"Contracted" doesn't work here, as even though they "adhere to the 'convention'", they are not actually 'on contract'. Any use of 'registered' or 'recognized' is as you say inappropriate — and in any case, would better translate 'agréé'. "In-network" is possibly the best, but would not work, I feel, in EN-GB.

SafeTex Mar 17, 2020:

@Tony and all There are a number of translations for "conventionné" perhaps partly dependent on context but not always.
We can find "registered" "in-network" (US), "recognized", "contracted" etc. and of course "approved" (used by Jeremy)
If you don't entirely agree with Jeremy, what would be your choice then?
I often use "contracted" as i don't like talking about a doctor for instance who is "not recognized". That suggests "charlatan" or "quack" to me.