I'm surprised Dr Sheila de Liz's receptionist told you that, Lillypilly, in view of this most recently posted info from Dr de Liz herself:
I am an american Ob/Gyn in Wiesbaden, I have many american patients. Check out my ad on Toytown, if you like, simply email me and I´ll have my assitant contact you for scheduling.
Good luck with the move to Wiesbaden!
Dr de Liz
You may want to call her receptionist back and suggest they might like to inform the Dr of their policy so she herself can avoid giving out information which conflicts with that policy in future.*
Future readers may also find additional, or supplemental, information on this thread: Need Doctors Wiesbaden, Heidelburg, or Frankfurt
ETA: *It would probably be as effective, and more likely to avoid the risk of putting the receptionist's nose out of joint, to email Dr de Liz and ask her to please instruct her assistant to schedule an appointment. I would recommend you mention you are confused by the inconsistency of her TT posting and what your husband was told by her receptionist.