Five things to know: 1. The new rule allows states to add routine non-pediatric dental services as an essential health benefit to benchmark plans beginning in 2025, according to an April 2 news release. 2. CMS said the new rule expands access to care by removing regulatory barriers, and also gives states the opportunity to improve oral health outcomes for adult patients. 3. This additional coverage would become effective after Jan. 1, 2027, for states that add the services to their benchmark plans. 4. The Department of Health and Human Services proposed this rule in November. 5. The American Dental Association voiced its support for the rule in January because of the impact oral health issues can potentially have on other chronic medical conditions.