TSW
..."In the state of California a minor can:
...consent to his or her own mental health treatment or counseling on an outpatient basis or participate in a decision to consent to residential shelter services if he or she is at least 12 years old, is determined to be sufficiently mature to consent to residential shelter services, or is otherwise emanicapted." (Fam. Code Sec. 6920, 6921, 6924). (Nolo's Guide to California Law, 8th Ed., 2004).
Go to NoloPress.com if you want more information I can also link you to other legal sites if you want. Just let me know.