It’s best to search through the American Thyroid Association ~ it is hidden a little, so I’m putting the link here:
http://thyroid.org/patients/specialists.php
Direction for another time: On the main website, click "Publications & Links." The top link is to the American Thyroid Association. On the lower left side of the ATA main page there is a link under Patient Resources that says "Find a Specialist." That’s where this URL will take you.