Senate Bill 6146 creates a new licensed category, the "oral preventive assistant," and requires the Washington State Dental Quality Assurance Commission to issue licenses to applicants who pay applicable fees, submit required forms, and complete commission‑approved training. The commission must adopt rules defining the oral preventive assistant scope of services to be performed under dentist supervision; the required scope must include dental assisting duties already allowed under dentist supervision, periodontal probing after initial probing and diagnosis by a dentist or dental hygienist, and dental prophylaxis for patients in a "healthy oral state" as defined by the commission. The bill also requires that dentists not assign duties to oral preventive assistants (or dental assistants) until the assistant has demonstrated competency in those duties. The bill amends existing law to change dental assistant scope and supervision rules (RCW 18.260.040), permitting dental assistants to apply topical anesthetic agents, requiring most dental assistant services be performed under close supervision (with sterilization allowed under general supervision), and listing procedures dental assistants may not perform. It amends credentialing provisions (RCW 18.260.090) to state issuance or denial of credentials based on meeting requirements or unprofessional conduct/impairment and to allow the commission to adopt renewal and continuing education requirements for oral preventive assistants and expanded function dental auxiliary licenses. It also amends dental hygienist licensure requirements (RCW 18.29.021) to allow a dentist with at least five years of lawful practice in another country or province to apply for examination and licensure as a dental hygienist if the secretary, in consultation with the dental commission and dental hygiene examining committee, determines comparability and documentation is provided. The bill adds two new sections to chapter 18.260 RCW and references fee and administrative authority provisions (RCW 43.70.110, 43.70.250, 43.70.280) and the dental hygiene examining committee (RCW 18.29.110). Important details not provided in the extracted text include the commission’s and the secretary’s full official titles and placement, the specific content and approval criteria of the oral preventive assistant training, the commission’s definition of "healthy oral state," exact fee amounts, and any implementation timelines or enforcement procedures. The bill was read for the first time on 01/14/26 and referred to the Senate Committee on Health & Long‑Term Care.

If enacted, the law would create a new licensed role called an oral preventive assistant who, after state-approved training and payment of state fees, could perform certain preventive tasks under a dentist’s supervision (including some periodontal probing and prophylaxis for patients the commission defines as in a “healthy oral state”) and would require dentists to confirm competency before assigning duties. Dental practices could use these assistants to provide more preventive care, potentially increasing access, but they would face new licensing and training costs for hires, ongoing renewal or continuing education requirements if adopted by the commission, and stricter supervision rules for most dental assistant services. The Dental Quality Assurance Commission and the state secretary would take on rulemaking, licensing, and fee roles, and internationally trained dentists with at least five years’ lawful practice could seek dental hygienist licensure if their training is judged comparable. Key implementation details are missing here—exact training content, the commission’s definition of “healthy oral state,” fee amounts, and timelines for rulemaking—so the practical pace and scale of these changes for clinics and regulators remain uncertain.