California Code, Business and Professions Code - BPC § 2620

(a) Physical therapy means the art and science of physical or corrective rehabilitation or of physical or corrective treatment of any bodily or mental condition of any person by the use of the physical, chemical, and other properties of heat, light, water, electricity, sound, massage, and active, passive, and resistive exercise, and shall include physical therapy evaluation, treatment planning, instruction and consultative services.  The practice of physical therapy includes the promotion and maintenance of physical fitness to enhance the bodily movement related health and wellness of individuals through the use of physical therapy interventions.  The use of roentgen rays and radioactive materials, for diagnostic and therapeutic purposes, and the use of electricity for surgical purposes, including cauterization, are not authorized under the term “physical therapy” as used in this chapter, and a license issued pursuant to this chapter does not authorize the diagnosis of disease.

(b) Nothing in this section shall be construed to restrict or prohibit other healing arts practitioners licensed or registered under this division from practice within the scope of their license or registration.