The preferred dentist program administered by Principal is designed to provide the dental coverage you need with the features you want like the freedom to visit the dentist of your choice, in or out of network. Use network providers to receive higher benefits. Go to www.principal.com to access secure information about your Principal benefits including access to an image of your ID Card. Your on - line account will be set up within 30 days after your plan effective date.. Visit www.principal.com Click on Find A Provider; You will need to know your plan, which can be found on the first page of your dental benefit summary. LINK TO DENTAL CARRIER LINK TO FIND A PROVIDER