California Code, Business and Professions Code - BPC § 726

(a) The commission of any act of sexual abuse, misconduct, or relations with a patient, client, or customer constitutes unprofessional conduct and grounds for disciplinary action for any person licensed under this division or under any initiative act referred to in this division.

(b) This section shall not apply to consensual sexual contact between a licensee and his or her spouse or person in an equivalent domestic relationship when that licensee provides medical treatment, other than psychotherapeutic treatment, to his or her spouse or person in an equivalent domestic relationship.