Adult Mental Health Counseling Services in Southern California

Alter Behavioral Health provides personalized adult mental health counseling and treatment for depression, anxiety, bipolar disorder, trauma, PTSD, schizophrenia, addiction, and co-occurring conditions. With residential, partial hospitalization, intensive outpatient, and crisis services across Southern California, our evidence-based, whole-person approach helps adults and families move toward stability, healing, and lasting recovery.

Adult mental health counseling session with clinician and client in a calm treatment setting

Our Adult Mental Health Counseling Services

Personalized behavioral health programs support adults through different levels of mental health, trauma, and co-occurring disorder care.

Residential Treatment

Comprehensive residential mental health care supports adults with complex psychiatric, trauma, and co-occurring conditions through evidence-based therapy, family participation, and individualized treatment planning.

Partial Hospitalization

PHP provides intensive outpatient support for adults who need structured care for depression, anxiety, bipolar disorder, trauma, schizophrenia, borderline personality disorder, or substance use concerns.

Intensive Outpatient

IOP offers structured mental health and substance use treatment at a lower level of care, using CBT, DBT, EMDR, family sessions, and personalized clinical support.

Whole-Person Care

Personalized Support for Lasting Stability

Alter Behavioral Health combines evidence-based counseling with compassionate, individualized care for adults navigating mental health, trauma, addiction, or co-occurring disorders. Treatment may include CBT, DBT, EMDR, family therapy, mindfulness, and other therapeutic approaches selected around each person’s needs. Across Southern California, clients can access a continuum of support designed to encourage stability, practical progress, and recovery beyond discharge.

Clinician providing supportive adult mental health counseling during a treatment session
Support That Matters

Stories of Transformation

Discover how personalized, compassionate care can help adults and families pursue meaningful mental health recovery.

"Alter is an amazing place with amazing clinical staff and treatment professionals! You guys are a lifesaver!"

Ron S.

"They listened without judgment. They acted with care and confidence. I never felt alone here. The support was real, and the changes I made still hold strong."

J.L

"I had a beautiful experience here and the staff was amazing. Everyone was so caring and sweet. They’ve turned my life around for the better."

Ellie A.

"Alter is an amazing place with amazing clinical staff and treatment professionals! You guys are a lifesaver!"

Ron S.

"They listened without judgment. They acted with care and confidence. I never felt alone here. The support was real, and the changes I made still hold strong."

J.L

"I had a beautiful experience here and the staff was amazing. Everyone was so caring and sweet. They’ve turned my life around for the better."

Ellie A.

"Alter is an amazing place with amazing clinical staff and treatment professionals! You guys are a lifesaver!"

Ron S.

"They listened without judgment. They acted with care and confidence. I never felt alone here. The support was real, and the changes I made still hold strong."

J.L

"I had a beautiful experience here and the staff was amazing. Everyone was so caring and sweet. They’ve turned my life around for the better."

Ellie A.
The Alter Difference

Why Choose Alter Behavioral Health?

Our care model brings together clinical expertise, compassion, and support across the behavioral health journey.

Full Continuum

Access residential, crisis, PHP, IOP, outpatient, transitional, and therapeutic support services through one care model.

Evidence-Based

Psychiatrists and doctorate- or master’s-level clinicians provide individualized, trauma-informed treatment across Southern California.

Whole-Person Care

Treatment addresses body, mind, and spirit while supporting long-term recovery, functioning, and sustained stability.

24/7 Support

Clinical and admissions support is available around the clock for clients, families, and referring providers.

Meet the Alter Behavioral Health Team

Compassionate clinicians help adults and families move toward meaningful transformation.

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 conditions does adult mental health counseling address?

Alter Behavioral Health provides treatment for conditions including depression, anxiety, bipolar disorder, trauma, PTSD, schizophrenia, borderline personality disorder, ADHD, substance use, and co-occurring disorders. Care is individualized and may involve residential treatment, crisis stabilization, partial hospitalization, intensive outpatient services, family therapy, and evidence-based modalities selected according to clinical needs.

What is the difference between PHP and IOP?

Does Alter Behavioral Health offer residential mental health treatment?

Is crisis stabilization available for adults in acute psychiatric crisis?

Which therapies may be used in treatment?

Does Alter Behavioral Health accept insurance?

How do I begin adult mental health counseling services?

Does Alter serve clients from outside Southern California?

Have More Questions About Treatment?

Speak with Alter Behavioral Health about personalized care options and next steps.

Southern California Service Areas

Alter Behavioral Health provides behavioral health programs across Southern California and supports clients nationwide.

Looking for Care in Your Area?

Contact admissions to discuss available programs and Southern California locations.

Accredited & Recognized

Awards and Recognition

The Joint Commission Gold Seal of Approval accreditation

Gold Seal of Approval Accreditation

Accreditation from The Joint Commission.

Care Predictor Certified Treatment Facility recognition

Care Predictor Certified Treatment Facility

Recognition as a Care Predictor Certified Treatment Facility.

The Joint Commission National Quality Approval

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.

Begin Your Path Toward Healing

Contact Alter Behavioral Health to discuss counseling, treatment levels, insurance verification, and enrollment options with admissions.

Contact Us Today

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