Keep your options open to volunteer in the future.
The state of Colorado makes it easy to volunteer as a dentist or hygienist when you retire but your license must remain active. If you’re retired or retiring, fill out the form “Application for Retired Status” and pay a fee of $20 so you can still volunteer in the future.
It is important to note the following requirement on the form: By checking this box, I attest that as of the date this application is submitted, I will not practice dentistry/dental hygiene in Colorado nor will I earn income as a dentist/dental hygienist, administrator, or consultant, although I may continue to provide dental/dental hygiene services to the indigent on a limited basis as long as no fee is charged and no compensation is received.
Find the form on the DORA website at https://dpo.colorado.gov/Dental/ApplicationsDocs.
Please note: If you let your license expire, the requirements to reactivate are much more comprehensive.