I know that both the US and UK consulates often publish a list of English speaking doctors in the country. Check the websites for the US and UK consulates in Italy (probably Rome) under their sections for their own nationals living in Italy.

The lists are not recommendations, but just responses to a questionnaire the consulates send round every year or two - but it does give you some idea who claims to be English-speaking in the area.
Cheers,
Bev