Mailing Address:

175 Bloor Street East
North Tower, Suite 601
Toronto, Ontario
M4W 3R8

Office Hours: Monday to Friday — 8:30 a.m. to 4:30 p.m.

Telephone: 416-961-6234
Toll-free: 1-800-268-2346 (Ontario)

Registration and Application Enquiries — registration@cdho.org
Email this address for information about the initial application process, annual renewal or to update personal information.

Quality Assurance Enquiries — qualityassurance@cdho.org
Email this address for information about professional development requirements, the Self-Assessment, and peer and practice assessments.

Practice Advice — advice@cdho.org
Email the Practice Advisors for questions about the practice standards, laws and ethics that impact the practice of Dental Hygiene in Ontario.

Complaint and Mandatory Report Enquiries — complaints@cdho.org
Email this address to report a complaint or concern about a Registered Dental Hygienist, or for help filing a complaint or mandatory report.

General Enquiries — info@cdho.org
Email this address for issues relating to logging in or navigating the Self-Service Portal, or to report a technical issue.

Communications Enquiries — communications@cdho.org
Email this address for media enquiries or for information about CDHO documents and announcements.