Mental health facility in Mission Viejo CA. Alter Behavioral Health in Mission Viejo provides residential treatment for depression, anxiety, autism co-occurring disorders, bipolar disorder, trauma and PTSD, attention-deficit/hyperactivity disorder (ADHD), schizophrenia, borderline personality disorder (BPD) and dissociative identity disorder (DID). We provide individualized care for each patient, tailoring treatment based on their mental health disorders and specific needs.