Adult Residential Mental Health Treatment in Southern California

Alter Behavioral Health provides personalized residential mental health treatment for adults facing complex psychiatric, trauma, substance use, and co-occurring disorders. With private residences, compassionate clinical support, and evidence-based therapies, programs are designed to promote stability, meaningful healing, and long-term recovery. Care is available across Southern California, with 24/7 admissions and crisis support for individuals and families seeking a safer next step.

Adult residential mental health treatment setting with a clinician speaking with a client

Our Residential Mental Health Services

Comprehensive care options support adults through residential treatment, crisis stabilization, outpatient care, and co-occurring addiction recovery.

Residential Treatment

Residential Mental Health Treatment provides structured, person-centered care for adults with psychiatric, trauma, substance use, and co-occurring disorders in supportive Southern California residences.

Crisis Stabilization

Crisis Stabilization and Intervention offers acute support, clinical assessment, psychiatric stabilization, risk assessment, safety planning, and family sessions for adults experiencing mental health crises.

Partial Hospitalization

The Partial Hospitalization Program provides intensive outpatient care using CBT, DBT, EMDR, family therapy, and other evidence-based approaches tailored to individual treatment needs.

Intensive Outpatient

Intensive Outpatient treatment offers structured mental health and substance abuse care at a lower level than residential or partial hospitalization, supporting continued progress and recovery.

Dual Diagnosis Treatment

Dual-diagnosis treatment addresses co-occurring addiction and mental health conditions through coordinated care, therapeutic support, family participation, and multiple levels of treatment.

Continuing Care Support

Aftercare planning, local support groups, recovery resources, and gradual transitions help clients practice life skills and maintain stability beyond residential treatment.

Whole-Person Treatment

Personalized Care For Lasting Recovery

Residential treatment offers adults a supportive environment for addressing mental health, trauma, addiction, and co-occurring conditions together. Alter Behavioral Health combines individualized care plans with CBT, DBT, EMDR, brainspotting, mindfulness, family therapy, and holistic supports. Across Southern California residences, clients can receive compassionate clinical care, private accommodations, and planning for continued recovery after discharge.

Clinician providing personalized residential mental health support to an adult client
Support That Connects

Stories Of Transformation

Discover how personalized treatment and continuing support can help adults and families move toward lasting recovery.

"In the one-on-one therapy for residents, clients are treated like humans and not a number. The staff goes above and beyond for the client’s care. Alter saved my family!"

Joyce S.

"Me being a Registered Nurse never imagined being in need of the same services that I’ve given over the years. I can truly say I’m very pleased with my overall stay at Alter Behavioral Health, starting with the admission coordinator, The Therapist and case manager I give all staff an..."

Terry H.

"Alter saved my life. I have been in treatment for over a year but really started working on myself after my suicide attempt in December. I came to Alter in December a very broken person. Alter has given me the tools, resources, support, and care to piece my life back..."

Terry

"In the one-on-one therapy for residents, clients are treated like humans and not a number. The staff goes above and beyond for the client’s care. Alter saved my family!"

Joyce S.

"Me being a Registered Nurse never imagined being in need of the same services that I’ve given over the years. I can truly say I’m very pleased with my overall stay at Alter Behavioral Health, starting with the admission coordinator, The Therapist and case manager I give all staff an..."

Terry H.

"Alter saved my life. I have been in treatment for over a year but really started working on myself after my suicide attempt in December. I came to Alter in December a very broken person. Alter has given me the tools, resources, support, and care to piece my life back..."

Terry

"In the one-on-one therapy for residents, clients are treated like humans and not a number. The staff goes above and beyond for the client’s care. Alter saved my family!"

Joyce S.

"Me being a Registered Nurse never imagined being in need of the same services that I’ve given over the years. I can truly say I’m very pleased with my overall stay at Alter Behavioral Health, starting with the admission coordinator, The Therapist and case manager I give all staff an..."

Terry H.

"Alter saved my life. I have been in treatment for over a year but really started working on myself after my suicide attempt in December. I came to Alter in December a very broken person. Alter has given me the tools, resources, support, and care to piece my life back..."

Terry
The Alter Difference

Why Choose Alter Behavioral Health?

A compassionate, evidence-based approach supports clients and families across the full continuum of care.

Full Continuum

Residential, crisis, PHP, IOP, outpatient, transitional, and therapeutic support services connect care across changing needs.

Personalized Plans

Individualized treatment plans address mental health, trauma, addiction, and co-occurring conditions together.

24/7 Support

Clinical and admissions support is available around the clock for Southern California and nationwide referrals.

Clinical Innovation

Care Predictor technology and evidence-based therapies support individualized engagement and treatment planning.

Meet The Alter Team

Experienced leaders and clinicians guide compassionate, evidence-based care.

Portrait of Michael Castanon, Founder and CEO of Alter Behavioral Health

Michael Castanon

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.

Frequently Asked Questions

What does it mean to be sent to a residential facility?

Being sent to a residential facility means living temporarily in a supportive treatment setting while receiving structured mental health care. Adults may participate in individual and group therapy, psychiatric services, family sessions, skills work, and other evidence-based supports. Residential care offers more structure than outpatient treatment and can help stabilize complex psychiatric, trauma, substance use, or co-occurring conditions in a supervised environment.

Who can benefit from adult residential mental health treatment?

What therapies are offered in residential treatment?

How long does residential mental health treatment last?

Can residential treatment address addiction and mental health together?

What happens during the admissions process?

Does Alter Behavioral Health accept insurance?

Where are adult residential treatment facilities located?

Have More Treatment Questions?

Speak with admissions about program fit, locations, and next steps.

Southern California Locations

Residential, crisis, and outpatient programs serve clients across Southern California and support nationwide referrals.

Southern California

Service Area

24/7 Available

Admissions Support

Nationwide Referrals

Care Access

Looking For Care Near You?

Contact admissions to discuss available programs and locations.

Accredited & Recognized

Awards and Recognition

Care Predictor Certified Treatment Facility recognition

Care Predictor Certified Treatment Facility

Recognition listed by Alter Behavioral Health.

The Joint Commission National Quality Approval recognition

The Joint Commission National Quality Approval

National quality approval listed by Alter Behavioral Health.

DHCS recognition and certification

DHCS recognition and certification

Recognition and certification listed by Alter Behavioral Health.

Best Residential Mental Health Treatment Center in California 2024 nomination

Nominated for Best Residential Mental Health Treatment Center in California, 2024

Award nomination listed by Alter Behavioral Health.

Take The Next Step Toward Care

Connect with Alter Behavioral Health to discuss residential treatment, program fit, insurance verification, and admissions options.

Request a Treatment Consultation

For immediate assistance, feel free to give us a direct call at (866) 248-9285.