1 / 2At a Glance
Primary Focus
Treatment Settings
Treatment Approaches
Special Programs
About Mountainside Huntington Outpatient
Mountainside Huntington brings award-winning outpatient addiction treatment to Long Island, NY, offering Outpatient Program and Intensive Outpatient (IOP) services for men and women navigating recovery. Accredited by both the Joint Commission and CARF, the center addresses substance use alongside co-occurring conditions including Trauma/PTSD and dual diagnosis. It accepts private insurance and self-pay.
Mountainside Huntington is a Joint Commission (JCAHO)- and CARF-accredited substance use treatment center located at 141 East Main Street in Huntington, NY, serving Suffolk County on Long Island. Rated the number-one outpatient addiction treatment center on Long Island according to the center's own recognition, Mountainside Huntington operates as part of the broader Mountainside network and focuses exclusively on outpatient recovery services — making it a strong option for people building sustainable, community-connected lives after initial stabilization.
The center offers two distinct outpatient levels of care: a standard Outpatient Program and an Intensive Outpatient Program (IOP). The IOP is designed for people who need more structured support than traditional outpatient allows — typically multiple sessions per week — while still living at home or in a community setting. Both levels of care position Mountainside Huntington as a recovery partner for the longer arc of treatment, fitting naturally into the continuum that follows residential or detox-level care.
Cognitive Behavioral Therapy (CBT) anchors the clinical approach at Mountainside Huntington. The center also addresses co-occurring disorders and dual diagnosis alongside substance use, as well as Trauma and PTSD — recognizing that lasting recovery frequently requires treating the full picture of a person's mental and emotional health, not just the substance use in isolation. Services are delivered in English for men and women.
Mountainside Huntington serves adult men and women seeking outpatient addiction treatment or a structured step-down after more intensive care. The facility accepts private insurance and self-pay, giving individuals and families meaningful options when financing treatment. Its dual accreditation from the Joint Commission and CARF signals a measurable commitment to quality standards that families evaluating long-term recovery partners can rely on. The center's regular weekday hours — including an extended Wednesday evening — reflect a schedule built around people balancing recovery with real life.
Outpatient & IOP Recovery Programs in Huntington, NY
Mountainside Huntington offers two levels of outpatient addiction treatment designed to meet people where they are in their recovery journey. The standard Outpatient Program provides consistent, scheduled care that fits alongside daily responsibilities, while the Intensive Outpatient Program (IOP) delivers a more concentrated level of support for individuals who benefit from additional structure without requiring residential treatment. Together, these programs make Mountainside Huntington a meaningful option for people stepping down from higher levels of care or beginning outpatient treatment for the first time.
Both programs are delivered at the center's Huntington, NY location — accessible to residents of Suffolk County and the broader Long Island area. The facility operates Monday through Friday, with extended hours on Wednesday evenings, reflecting a practical commitment to making ongoing outpatient care fit into real lives. Private insurance and self-pay are accepted, and the center's Joint Commission and CARF accreditations provide a measurable assurance of quality for individuals and families evaluating their options.
Treating Co-Occurring Disorders and Trauma Alongside Substance Use
Recovery from substance use is rarely a single-issue process. At Mountainside Huntington, the clinical framework explicitly addresses co-occurring disorders and dual diagnosis, recognizing that mental health conditions frequently intersect with addiction. Trauma and PTSD are among the specific conditions treated at the center — a significant focus given how commonly unresolved trauma underlies or complicates long-term recovery.
Cognitive Behavioral Therapy (CBT) is the confirmed therapeutic method used at Mountainside Huntington. CBT is a structured, skills-based approach that helps people identify thought patterns connected to substance use and develop practical strategies for maintaining recovery. For men and women working through both addiction and co-occurring mental health challenges, a CBT-grounded program offers a concrete framework for the day-to-day work of sustained recovery.
Who Mountainside Huntington Serves
Mountainside Huntington provides outpatient substance abuse treatment for adult men and women. The center's scope — spanning standard outpatient, IOP, dual diagnosis, and trauma-informed care — means it is equipped to work with people at different stages of their recovery, from those stepping down from residential treatment to those beginning structured outpatient care for the first time.
Financial accessibility is supported through private insurance and self-pay options. Families evaluating addiction treatment options for a loved one will find that the center's dual accreditation from the Joint Commission and CARF reflects adherence to rigorous, independently verified standards. For anyone on Long Island looking for an outpatient recovery center that takes co-occurring mental health seriously, Mountainside Huntington represents a credentialed, recognized choice in Suffolk County.
Accreditation and Quality Standards at Mountainside Huntington
Mountainside Huntington holds dual accreditation from the Joint Commission (JCAHO) and CARF — two of the most recognized independent accrediting bodies in the addiction treatment and behavioral health fields. These accreditations are not automatic; they require facilities to meet defined standards for clinical quality, safety, and organizational practices. For individuals and families choosing an outpatient program or IOP as part of a longer-term recovery plan, accreditation status is one of the clearest indicators of a center's commitment to accountable care.
The Joint Commission and CARF accreditations position Mountainside Huntington among a smaller subset of outpatient treatment providers in New York that have pursued and maintained both credentials. That distinction matters for people who are not just looking for a program to complete, but for a recovery community and treatment partner they can trust over time.
Why Choose Mountainside Huntington Outpatient
- Rated #1 outpatient addiction treatment center on Long Island, NY, per the center's own recognition
- Dual accreditation from both the Joint Commission (JCAHO) and CARF — two of the most respected standards bodies in addiction treatment
- Treats co-occurring disorders, dual diagnosis, and Trauma/PTSD alongside substance use — addressing the full scope of recovery needs
- Offers both standard Outpatient and Intensive Outpatient (IOP) programming, supporting step-down transitions and longer-term recovery maintenance
- Extended Wednesday evening hours accommodate men and women who need to balance outpatient treatment with work, family, or other recovery commitments
Frequently Asked Questions
What levels of care does Mountainside Huntington offer for addiction treatment?
Mountainside Huntington provides two outpatient levels of care: a standard Outpatient Program and an Intensive Outpatient Program (IOP). The IOP offers more frequent and structured sessions for people who need additional support while continuing to live in the community. Both programs are available at the Huntington, NY location.
Is Mountainside Huntington accredited?
Yes. Mountainside Huntington holds dual accreditation from both the Joint Commission (JCAHO) and CARF. These are two of the most widely recognized independent accrediting bodies in behavioral health and addiction treatment, and their standards cover clinical quality, safety, and organizational practices.
Does Mountainside Huntington treat co-occurring mental health conditions?
Yes. The center treats co-occurring disorders and dual diagnosis, as well as Trauma and PTSD, alongside substance use. Addressing these conditions together is a core part of the clinical approach at Mountainside Huntington.
What therapy methods are used at Mountainside Huntington?
Cognitive Behavioral Therapy (CBT) is the confirmed therapeutic method at Mountainside Huntington. CBT is a structured, skills-focused approach that helps people recognize and shift thought patterns connected to substance use and build practical recovery skills.
Who does Mountainside Huntington serve?
Mountainside Huntington provides substance abuse treatment services for adult men and women. The center addresses both substance use and co-occurring conditions, including dual diagnosis and Trauma/PTSD, within its outpatient and IOP programming.
What payment options does Mountainside Huntington accept?
Mountainside Huntington accepts private insurance and self-pay. For specific questions about insurance coverage or costs, prospective clients and families can contact the center directly at (631) 760-1889 or by email at [email protected].
Where is Mountainside Huntington located, and what are its hours?
The center is located at 141 East Main Street, Floor 2, Huntington, NY 11743. Hours are Monday, Tuesday, Thursday, and Friday from 9:00 AM to 5:30 PM, with the exception of Friday, which closes at 4:30 PM, and Wednesday, which offers extended hours from 9:00 AM to 7:30 PM.
Is Mountainside Huntington a good fit for someone stepping down from residential treatment?
Mountainside Huntington's Outpatient Program and Intensive Outpatient Program (IOP) are well-suited for people transitioning out of residential treatment who still need structured support. The IOP in particular provides more frequent sessions than standard outpatient, bridging the gap between higher levels of care and independent recovery.
How can I contact Mountainside Huntington to start the admissions process?
You can reach the Mountainside Huntington admissions team by phone at (631) 760-1889 or by email at [email protected]. Additional information is available at Mountainside.com.
Nearby Treatment Centers

Huntington Youth Bureau Huntington Drug and Alcohol Project
Huntington, NY
- Outpatient
Substance use treatment · Accepts clients on opioid medication but prescribed elsewhere · Cognitive behavioral therapy
Accepts: Cash or self-payment, Medicaid, Private health insurance
WellLife Network Outpatient 2
Huntington, NY
- Outpatient
- MAT
Substance use treatment · Accepts clients on opioid medication but prescribed elsewhere · Cognitive behavioral therapy
Accepts: Cash or self-payment, Medicaid, Private health insurance
Suffolk County Department of Health Huntington Methadone Clinic
Huntington Station, NY
- Outpatient
- MAT
Substance use treatment · All Clients in Opioid Treatment Program · SAMHSA-certified Opioid Treatment Program
Accepts: Cash or self-payment, Medicaid, Medicare

Samaritan Daytop Village Inc Suffolk Outreach Center OP
Huntington Station, NY
- IOP
- MAT
Substance use treatment · Accepts clients on opioid medication but prescribed elsewhere · Cognitive behavioral therapy
Accepts: Cash or self-payment, Medicaid, State-financed health insurance plan other than Medicaid
Tempo Group Syosset
Syosset, NY
- Outpatient
- MAT
Substance use treatment · Accepts clients on opioid medication but prescribed elsewhere · Cognitive behavioral therapy
Accepts: Cash or self-payment, Medicaid, Medicare

Catholic Charities of Rockville Centre Outpatient Alcohol Clinic/Commack
Commack, NY
- Outpatient
- MAT
Substance use treatment · Accepts clients on opioid medication but prescribed elsewhere · Cognitive behavioral therapy
Accepts: Cash or self-payment, Medicaid, Medicare
