The Dentist and Dental Hygienist Compact (DDH) is an interstate agreement that provides a pathway through which dentists and dental hygienists can obtain authorization to practice in states where they are not licensed. DDH will create reciprocity among participating states. On May 4, 2023, Gov. Inslee signed ESHB 1576 making Washington state one of three participating states. DDH will be enacted once seven states become participating states.