Cal. Business and Professions Code § 900

(a) Nothing in this division applies to a health care practitioner licensed in another state or territory of the United States who offers or provides health care for which he or she is licensed, if the health care is provided only during a state of emergency as defined in subdivision (b) of Section 8558 of the Government Code, which emergency overwhelms the response capabilities of California health care practitioners and only upon the request of the Director of the Emergency Medical Services Authority. (b) The director shall be the medical control and shall designate the licensure and specialty health care practitioners required for the specific emergency and shall designate the areas to which they may be deployed. (c) Health care practitioners shall provide, upon request, a valid copy of a professional license and a photograph identification issued by the state in which the practitioner holds licensure before being deployed by the director. (d) Health care practitioners deployed pursuant to this chapter shall provide the appropriate California licensing authority with verification of licensure upon request. (e) Health care practitioners providing health care pursuant to this chapter shall have immunity from liability for services rendered as specified in Section 8659 of the Government Code. (f) For the purposes of this section, “health care practitioner” means any person who engages in acts which are the subject of licensure or regulation under this division or under any initiative act referred to in this division. (g) For purposes of this section, “director” means the Director of the Emergency Medical Services Authority who shall have the powers specified in Division 2.5 (commencing with Section 1797) of the Health and Safety Code.