I went to Dr. Caroline Burgan-Colberg. She is located near Champal but was worth the trip (if you're not near that neighborhood already). She speaks English, French and German and is very nice and will discuss and explain answers to questions you have.

26, Rue de Contamines, 1206 Genève (entrance is around the corner)

022 704 32 23

I think both receptionists speak some English but will answer the phone in French.

This English-speaking doctor was also recommended to me but I haven't been yet:

Dr méd. Catherine Renold - Moynier
spéc. FMH en médecine interne

Chemin du Champ-Baron 1
1209 Genève
Téléphone:
022 734 71 77

Here is a site as well but I don't know that you can filter by languages the doctor speaks:

www.doktor.ch/arzt/12090227347177.html

Good luck!