Partial Hospitalization
PHP provides intensive outpatient mental health care for adults with conditions including depression, anxiety, bipolar disorder, trauma, PTSD, schizophrenia, borderline personality disorder, and substance use disorders.
Alter Behavioral Health provides supportive PHP housing and intensive mental health treatment for adults who need structured care without traditional inpatient hospitalization. With locations throughout Southern California, including Irvine, Dana Point, San Juan Capistrano, and San Diego, the program combines personalized clinical support, evidence-based therapies, and a stable environment for continued healing, skill-building, and transition toward everyday life.

Structured behavioral health programs supporting adults through partial hospitalization, residential care, outpatient treatment, and crisis stabilization.
PHP provides intensive outpatient mental health care for adults with conditions including depression, anxiety, bipolar disorder, trauma, PTSD, schizophrenia, borderline personality disorder, and substance use disorders.
Residential mental health treatment offers a more immersive setting for adults needing comprehensive care, person-centered support, family participation, and evidence-based treatment for complex psychiatric or co-occurring disorders.
IOP provides structured mental health and substance use treatment at a lower level of care than PHP or residential treatment, helping clients continue progress while practicing skills in everyday life.
PHP housing can provide adults with a stable, supportive setting while they participate in intensive outpatient treatment. Alter Behavioral Health combines individualized care plans with CBT, DBT, EMDR, family therapy, and other therapeutic approaches. Across Southern California locations, clients can work on symptom management, coping skills, recovery goals, and a gradual transition toward daily life with coordinated clinical support.

Personalized treatment supports meaningful progress, improved functioning, and sustained stability beyond discharge.
A compassionate, evidence-based continuum of care designed around each client’s needs.
Access coordinated levels of care spanning crisis stabilization, residential, PHP, IOP, outpatient, and support services.
Treatment integrates CBT, DBT, EMDR, family therapy, trauma-focused care, and holistic supports.
Personalized plans address mental health, trauma, addiction, functioning, and long-term recovery goals.
Psychiatrists and doctorate- or master's-level clinicians provide individualized care throughout Southern California.
Compassionate clinicians support clients through personalized behavioral health treatment.

Founder and CEO
Michael Castanon is the Founder and CEO of Alter Behavioral Health, a Southern California-based organization dedicated to advancing the future of mental health care. With a vision rooted in combining scientific rigor, genuine compassion, and lasting transformation, Michael has built Alter Behavioral Health into a comprehensive provider offering a full continuum of care, including residential treatment, partial hospitalization, intensive outpatient, and outpatient services. He is committed to ensuring that every client receives individualized, evidence-based treatment delivered by skilled psychiatrists and clinicians. Under his leadership, the organization has earned The Joint Commission's Gold Seal of Approval and recognition as a Care Predictor Certified Treatment Facility. Michael's mission is to empower individuals and families across Southern California and nationwide to heal, thrive, and achieve sustained recovery through innovative, whole-person care.
Partial Hospitalization Program care is an intensive outpatient level of treatment, while residential treatment provides a more immersive living environment with comprehensive support. PHP may be appropriate for adults who need structured clinical care but do not require residential services. Residential treatment may better fit people needing greater supervision, daily support, or a more contained setting. An assessment helps determine the appropriate level of care.
Speak with Alter Behavioral Health about consultation, enrollment, and treatment options.
Accreditation from The Joint Commission.
Recognition as a Care Predictor Certified Treatment Facility.
National quality approval from The Joint Commission.
Recognition and certification from DHCS.
Contact Alter Behavioral Health to discuss PHP housing, insurance verification, private-pay options, and enrollment.
For immediate assistance, feel free to give us a direct call at (866) 248-9285.
For immediate assistance, feel free to give us a direct call at (866) 248-9285.