Understanding CNA License Renewal in California The CNA license renewal process in California is overseen by the California Department of Public Health. Most nursing assistants must renew their certification every two years. Renewal typically requires proof of paid CNA work experience and completion of continuing education units (CEUs). If you do not meet the work-hour requirements, you may need additional training or a skills assessment. Stay aware of deadlines to avoid letting your certification expire. Read the complete blog here: https://www.theconsumersfeedback.com/guestpost/cna-certification-renewal-what-every-nursing-assistant-should-know