Welcome to the Washington Dental Service Work With Us page. This page is designed to service our existing brokers and provide information to prospective partners. Washington Dental Service, a member of the Delta Dental Plans Association, is the leading dental benefits company in the state of Washington, delivering high-quality, affordable dental care to more than two million people through employer-sponsored programs. And because we bring more than fifty years of commitment to improving oral health, we can help ensure the best possible coverage. Becoming a broker with Washington Dental Service and Delta Dental can be invaluable to your business. Below are links to Washington Dental Service forms, dental benefits plan information, policies and benefit explanations.