ADHA Customer Service Numbers Home» ADHA» ADHA General Inquiries: +1 (312) 440-8900 Membership Related Inquiries: +1 (312) 440-8900 (options 1 & 2)National Board Review: +1 (312) 481-8813 Dental Hygiene Education Programs: +1 (312) 440-8942 State Legislative Advocacy: +1 (312) 440-8942 Leadership Development Committee: +1 (312) 440-8911 Communications And Publications: +1 (312) 440-8900 Corporate Address: American Dental Hygienists' Association 444 North Michigan Avenue, Suite 400 Chicago, IL 60611How To Contact ADHA Via Message?Contact us: You can write a text message to ADHA for any issue through the contact us page of www.adha.org/. EnquiryService Support: You can avail service support from ADHA by following the given path.Instagram Page: Contact ADHA via Instagram profile.Contact By Facebook: Follow the path to contact ADHA via Facebook profile.ADHA stands for American Dental Hygienists Association with its national nerve center at North Michigan Avenue, Chicago, IL. ADHA was set up in the year of 1923, has now become one of the bulkiest national organization producing the professional interests of the over one lakh eighty thousand registered dental hygienists (RDH) across the country. ADHA puts every effort on leading the transformation of the dental hygiene profession to improve the public's oral and overall health.