My endocrinologist is:

Zimmermann, Daniel
Dr. med. Innere Medizin FMH, Diabetologie u. Endokrinologie FMH
Zürichstrasse 67, 8910 Affoltern am Albis
Tel: 044 761 20 80
Fax: 044 761 13 36

It takes a while until you get an appointment, because he has a quite big waiting list. He is a very good professional, and he case you need, he can do ultrasounds and blood tests. Speaks perfect English.

About the referrall, i don't think you will need it. All i did was call and get appointment (but then again, i had been diagnosed before by another doctor)

Best of luck,

lucy