Cal. Business and Professions Code § 852

The performance, recommendation, or provision of any legally protected health care activity, as defined in Section 1798.300 of the Civil Code, by a licensee or a health care practitioner subject to this division acting within their scope of practice, for a patient who resides in a state in which the performance, recommendation, or provision of that legally protected health care activity is illegal, shall not, by itself, constitute professional misconduct under this division or any regulation governing the licensure, certification, or authorization of that licensee or practitioner, nor shall any license, certification, or authorization of a licensee or health care practitioner subject to this division be revoked, suspended, or annulled or otherwise subject to any other penalty or discipline provided in this division solely on the basis that the licensee or health care practitioner performed, recommended, or provided any legally protected health care activity for a patient who resides in a state in which the performance, recommendation, or provision of that legally protected health service is illegal.