California Code, Business and Professions Code - BPC § 719

(a) A person who is licensed as a health care practitioner in any other state and is employed by a tribal health program, as defined in Section 1603 of Title 25 of the United States Code, shall be exempt from any licensing requirement described in this division with respect to acts authorized under the person's license where the tribal health program performs the services described in the contract or compact of the tribal health program under the Indian Self-Determination and Education Assistance Act (25 U.S.C. Sec. 450 et seq.).

(b) For purposes of this section, “health care practitioner” means any person who engages in acts that are the subject of licensure or regulation under the law of any other state.