You may find your certification numbers and status on the California Registry by using the online certification verification system available through the Department of Public Health. The system displays information related to Certified Nurse Assistants (CNA), Home Health Aides (HHA), Certified Hemodialysis Technicians (CHT), and Nursing Home Administrators (NHA). If you would like additional information regarding CNA’s, HHA’s, and CHT’s, please send a message to the Aide and Technician Certification Section (ATCS).