Long-Term Residential Mental Health Treatment Facilities

Alter Behavioral Health provides personalized, long-term residential mental health treatment for adults facing complex psychiatric, trauma, addiction, and co-occurring disorders. With evidence-based therapies, compassionate clinical support, private accommodations, and a full continuum of care, our Southern California facilities help clients build stability, practice life skills, and prepare for meaningful recovery beyond treatment.

Clinician speaking with an adult client in a calm residential mental health treatment setting

Our Residential Mental Health Services

Explore coordinated treatment options designed to support adults across different levels of mental health and recovery needs.

Residential Treatment

Residential mental health treatment provides structured inpatient care for adults with psychiatric, trauma, addiction, and co-occurring disorders, supported by personalized plans and evidence-based therapies.

Partial Hospitalization

PHP offers intensive outpatient treatment for adults who need substantial clinical support without residential placement, using CBT, DBT, EMDR, family therapy, and individualized care.

Intensive Outpatient

IOP provides structured mental health and substance use treatment at a lower level of care, helping clients continue therapy while practicing recovery skills in daily life.

Whole-Person Treatment

Personalized Care for Lasting Stability

Long-term residential treatment offers adults a supportive setting to address complex mental health, trauma, addiction, and co-occurring concerns. Alter Behavioral Health combines individualized care plans, psychiatric oversight, evidence-based therapies, family participation, mindfulness, and holistic supports. Across its Southern California facilities, the approach focuses on lasting stability, practical life skills, and thoughtful transition planning beyond residential care.

Adult client participating in a supportive therapy session at a residential treatment facility
Support That Continues

Recovery Starts Here

Personalized treatment and continuing-care resources help clients and families move forward with greater stability.

"Alter Behavioral Health truly saved my life. I have GAD, MDD, and ADHD, and in September of 2021 I was diagnosed with stage 3 cancer. I began spiraling into some really destructive tendencies and poor coping mechanisms. I was destroying my life. Finally, in early August of 2022, I decided..."

Lili H.
Lili H.

"My experience was an amazing one. The staff were absolutely amazing. I couldn't give enough stars."

Maria D.

"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.

"Alter Behavioral Health truly saved my life. I have GAD, MDD, and ADHD, and in September of 2021 I was diagnosed with stage 3 cancer. I began spiraling into some really destructive tendencies and poor coping mechanisms. I was destroying my life. Finally, in early August of 2022, I decided..."

Lili H.
Lili H.

"My experience was an amazing one. The staff were absolutely amazing. I couldn't give enough stars."

Maria D.

"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.

"Alter Behavioral Health truly saved my life. I have GAD, MDD, and ADHD, and in September of 2021 I was diagnosed with stage 3 cancer. I began spiraling into some really destructive tendencies and poor coping mechanisms. I was destroying my life. Finally, in early August of 2022, I decided..."

Lili H.
Lili H.

"My experience was an amazing one. The staff were absolutely amazing. I couldn't give enough stars."

Maria D.

"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.
The Alter Difference

Why Choose Alter Behavioral Health?

Our care model brings clinical expertise, compassion, and coordinated support together.

Full Continuum

Access coordinated residential, crisis, PHP, IOP, transitional, outpatient, and therapeutic support services.

Personalized Care

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

Clinical Support

Psychiatrists and doctorate- or master's-level clinicians oversee evidence-based, trauma-informed treatment.

24/7 Support

Admissions and clinical support are available around the clock for clients, families, and referring professionals.

Meet the Alter Team

Compassionate clinicians support personalized, evidence-based mental health recovery.

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 is considered long-term psychiatric care?

Long-term psychiatric care generally refers to ongoing, structured treatment for people whose mental health needs require more support than routine outpatient therapy. It may include residential treatment, transitional services, partial hospitalization, intensive outpatient care, medication management, therapy, family participation, and aftercare planning. The appropriate level depends on clinical needs, safety considerations, symptoms, functioning, and progress during treatment.

What conditions are treated in long-term residential care?

How does residential mental health treatment work?

How is residential treatment different from PHP or IOP?

Does Alter Behavioral Health treat co-occurring addiction and mental health disorders?

What therapies are available in residential mental health treatment?

Does Alter Behavioral Health verify insurance?

How can someone begin long-term residential mental health treatment?

Need Guidance About Treatment Options?

Speak with the admissions team about care, coverage, and next steps.

Recognized Credentials

Awards and Recognition

Care Predictor Certified Treatment Facility recognition

Care Predictor Certified Treatment Facility

Recognition of Care Predictor certified treatment status.

The Joint Commission National Quality Approval recognition

The Joint Commission National Quality Approval

National quality approval from The Joint Commission.

DHCS recognition and certification

DHCS recognition and certification

Recognition and certification from DHCS.

Best Residential Mental Health Treatment Center in California 2024 nomination

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

2024 nomination for a California residential treatment center.

Take the Next Step Toward Support

Contact Alter Behavioral Health to discuss treatment options, admissions, insurance verification, and personalized care.

Contact Us Today

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