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Photo of John Colby, Clinical Social Work/Therapist
John Colby
Clinical Social Work/Therapist
Photo of John Colby, Clinical Social Work/Therapist

John Colby

Clinical Social Work/Therapist

Verified by Psychology Today Verified by Psychology Today
155 Main Dunstable Road, Suite 130, Nashua, NH 03060
Let's Connect (603) 691-1451
Photo of John Colby, Clinical Social Work/Therapist
GateHouse Treatment in Nashua, NH specializes in adults battling addiction to opioids (Fentanyl, Heroin, Oxycodone), stimulants (Cocaine, Methamphetamine), alcohol, and polysubstance use. Our clients seek structured, compassionate care to rebuild their lives. We offer Detox, PHP, IOP, and OP programs paired with sober living to address both recovery and community reintegration. Combining evidence-based therapies—medical care, trauma counseling, relapse prevention, and family programs—we tailor plans to your unique needs. Your Journey to Lasting Sobriety Begins Here. Contact us Today!
Crafting personalized Detox/PHP/IOP/OP plans for individuals living in Nashua, NH and surrounding areas. Our compassionate, evidence-based care tackles addiction’s roots with medical support, counseling, relapse prevention, trauma therapy, and family programs. Discover Care Designed for Lasting Sobriety - Call for a Consultation!
At GateHouse Treatment, we believe lasting recovery thrives on personalized care, not rigid timelines. Whether your first step or renewed commitment, our evidence-based programs empower a balanced, sober way of living. Call for More Information - Connect with Admissions Today!
Call or John Colby now for a free 15 minute consultation - (603) 691-1451

My Practice at a Glance

Available both in-person and online

Gatehouse Treatment

155 Main Dunstable Road

Suite 130

Nashua, NH 03060 map

(603) 691-1451

GateHouse Sober Community

131 Daniel Webster Highway

Suite 112

Nashua, NH 03060 map

Personalized PHP, IOP, OP & Detox programs in NH & MA. Telehealth for established clients. Serving Southern NH & Northern MA. Call Today!
I specialize in Drug & Alcohol Rehab, IOP, OP, PHP & Detox, Addiction and Alcohol Use 
I accept insurance 
I see individuals, families and groups  
Let's Connect (603) 691-1451
Photo of John Colby, Clinical Social Work/Therapist

My Practice at a Glance

Available both in-person and online

Gatehouse Treatment

155 Main Dunstable Road

Suite 130

Nashua, NH 03060 map

(603) 691-1451

GateHouse Sober Community

131 Daniel Webster Highway

Suite 112

Nashua, NH 03060 map

Personalized PHP, IOP, OP & Detox programs in NH & MA. Telehealth for established clients. Serving Southern NH & Northern MA. Call Today!
I specialize in Drug & Alcohol Rehab, IOP, OP, PHP & Detox, Addiction and Alcohol Use 
I accept insurance 
I see individuals, families and groups  

Finances

Payment Methods

ACH Bank transfer, American Express, Cash, Check, Discover, Health Savings Account, Mastercard, Paypal, Visa, Wire

Insurance

  • Aetna
  • Anthem
  • Blue Care Network
  • Blue Cross
  • Blue Shield
  • BlueCross and BlueShield
  • Carelon Behavioral Health
  • Cigna and Evernorth
  • EmblemHealth
  • Empire Blue Cross Blue Shield
  • GEHA
  • Great-West Life
  • Harvard Pilgrim
  • Highmark
  • Humana
  • Medicaid
  • MultiPlan
  • New Directions | Lucet
  • Optum
  • Tufts
  • UnitedHealthcare UHC | UBH
  • Value Options
"
Most Insurance Accepted. Employer-Provided Coverage & NH Medicaid Accepted. Private Pay Options are Available.
Photo of John Colby, Clinical Social Work/Therapist
John Colby
Clinical Social Work/Therapist
Call or for a free 15 minute consultation now - (603) 691-1451
"
Most Insurance Accepted. Employer-Provided Coverage & NH Medicaid Accepted. Private Pay Options are Available.
Photo of John Colby, Clinical Social Work/Therapist
John Colby
Clinical Social Work/Therapist
Call or for a free 15 minute consultation now - (603) 691-1451

Qualifications

  • Verified by Psychology Today Expired Licensed by State of Massachusetts / 222489 John Colby
    License state differs from primary location state.
  • Education and Years In Practice

  • In Practice for 10 years
Photo of John Colby, Clinical Social Work/Therapist
John Colby
Clinical Social Work/Therapist
Feel free to ask about qualifications and training experience. or (603) 691-1451
Photo of John Colby, Clinical Social Work/Therapist
John Colby
Clinical Social Work/Therapist
Feel free to ask about qualifications and training experience. or (603) 691-1451

Specialties and Expertise

Top Specialties

  • Drug & Alcohol Rehab, IOP, OP, PHP & Detox
  • Addiction
  • Alcohol Use

Expertise

  • Codependency
  • Drug Abuse
  • Medical Detox
  • Medication Management
  • Substance Use
  • Telehealth Services, Court-Ordered Rehab
  • Veterans
"
Specializing in treating substance use disorders, including opioid, alcohol, stimulant, and polysubstance dependencies. Our evidence-based plans combine medical care, trauma-informed counseling, relapse prevention, and family therapy to address root causes. Clients experience reduced cravings, improved emotional resilience, and strengthened relationships, empowering a balanced, sober lifestyle.
Photo of John Colby, Clinical Social Work/Therapist
John Colby
Clinical Social Work/Therapist
Call or for a free 15 minute consultation now - (603) 691-1451
"
Specializing in treating substance use disorders, including opioid, alcohol, stimulant, and polysubstance dependencies. Our evidence-based plans combine medical care, trauma-informed counseling, relapse prevention, and family therapy to address root causes. Clients experience reduced cravings, improved emotional resilience, and strengthened relationships, empowering a balanced, sober lifestyle.
Photo of John Colby, Clinical Social Work/Therapist
John Colby
Clinical Social Work/Therapist
Call or for a free 15 minute consultation now - (603) 691-1451

Client Focus

Age

Adults

Participants

Individuals
Family
Group

Communities

Bisexual Allied
Gay Allied
Lesbian Allied
Queer Allied
Transgender Allied

Age

Adults

Participants

Individuals
Family
Group

Communities

Bisexual Allied
Gay Allied
Lesbian Allied
Queer Allied
Transgender Allied

Treatment Approach

Types of Therapy

  • Acceptance and Commitment (ACT)
  • IOP, OP, PHP & Detox
  • Person-Centered
  • Structural Family Therapy
  • Telehealth Services, Court-Ordered Rehab
  • Trauma Focused
"
Our evidence-based approach combines medical care, trauma therapy, and relapse prevention counseling, alongside family programs. Your personalized plan addresses addiction's roots, building resilience and practical skills. Clients achieve balanced sobriety, rebuild relationships, and reintegrate into their communities. Compassionate, structured support guides your journey. Speak with admissions!
Photo of John Colby, Clinical Social Work/Therapist
John Colby
Clinical Social Work/Therapist
Call or for a free 15 minute consultation now - (603) 691-1451
"
Our evidence-based approach combines medical care, trauma therapy, and relapse prevention counseling, alongside family programs. Your personalized plan addresses addiction's roots, building resilience and practical skills. Clients achieve balanced sobriety, rebuild relationships, and reintegrate into their communities. Compassionate, structured support guides your journey. Speak with admissions!
Photo of John Colby, Clinical Social Work/Therapist
John Colby
Clinical Social Work/Therapist
Call or for a free 15 minute consultation now - (603) 691-1451

Location

Primary Location

Gatehouse Treatment

155 Main Dunstable Road

Suite 130

Nashua, NH 03060

(603) 691-1451

Additional Location

GateHouse Sober Community

131 Daniel Webster Highway

Suite 112

Nashua, NH 03060

(603) 691-1451
"
Personalized PHP, IOP, OP & Detox programs in NH & MA. Telehealth for established clients. Serving Southern NH & Northern MA. Call Today!
Photo of John Colby, Clinical Social Work/Therapist
John Colby
Clinical Social Work/Therapist
Call for a free consultation now - (603) 691-1451
"
Personalized PHP, IOP, OP & Detox programs in NH & MA. Telehealth for established clients. Serving Southern NH & Northern MA. Call Today!
Photo of John Colby, Clinical Social Work/Therapist
John Colby
Clinical Social Work/Therapist
Call for a free consultation now - (603) 691-1451