The bill amends RCW 18.59.020 to include a new definition for "intramuscular needling," also known as "dry needling," which is described as a skilled intervention using a sterile needle to stimulate myofascial trigger points and manage neuromusculoskeletal pain. The bill specifies that intramuscular needling requires an examination and diagnosis and does not include needle retention without stimulation or the stimulation of auricular and distal points. Additionally, the definition of "occupational therapy" is expanded to explicitly include performing intramuscular needling as part of the services provided by occupational therapists.

Furthermore, the bill establishes a new section that outlines the requirements for occupational therapists to perform intramuscular needling. This includes obtaining an endorsement from the secretary of health after completing specific educational and clinical experience criteria, such as 100 hours of didactic instruction and 150 treatment sessions under supervision. The bill also mandates that occupational therapists must remain in constant attendance during the procedure and requires informed consent from patients, detailing the risks, benefits, and potential side effects of intramuscular needling. Additionally, it emphasizes the need for coordination with acupuncturists if the patient is receiving concurrent treatment.