Wash. Rev. Code § 51.08.200
"Attending provider" means a person who is a member of the health care provider network established under RCW 51.36.010, is treating injured workers within the person's scope of practice, and is licensed under Title 18 RCW in one of the following professions: Physicians, chapter 18.71 RCW; osteopathy, chapter 18.57 RCW; chiropractic, chapter 18.25 RCW; naturopathy, chapter 18.36A RCW; podiatric medicine and surgery, chapter 18.22 RCW; dentistry, chapter 18.32 RCW; optometry, chapter 18.53 RCW; in the case of claims solely for mental health conditions, psychology, chapter 18.83 RCW; physician assistants, chapter 18.71A RCW; and licensed advanced registered nurse practitioners, chapter 18.79 RCW.
RCW 51.08.200
Effective date-Retroactive application- 2023 c 171: See note following RCW 51.04.050.