Keystone Hall – A Program of Harbor Care – Nashua, New Hampshire
615 Amherst Street, Nashua, New Hampshire, 03063
Last Updated: June 26, 2026

Insurance
Payment Options
- Cash or self-payment
- Medicaid
- State-financed health insurance plan other than Medicaid
- Private health insurance
- Federal military insurance (e.g., TRICARE)
Addiction Resource Score
Scoring is assigned by a proprietary system which helps surface key metrics that determine quality. The 10-point scale factors in categories such as operations, customer satisfaction, and trust metrics.
We understand that choosing an addiction treatment center can be overwhelming, especially with so many options, promises, and marketing messages. That's why we've developed a clear, standardized rating system designed to cut through the noise and highlight what truly matters: safety, quality of care, and transparency. Our goal is to give individuals and families the information they need to make confident, informed decisions during a critical time.
In this guide, we explain exactly how we rate treatment centers—from accreditation and staff credentials to therapy options, facility environment, and family involvement. You'll see how we assign scores, award badges, and update listings to ensure accuracy and fairness. Most importantly, our system focuses on elevating centers that prioritize ethical, evidence-based care, not just those with the best marketing. This way, you can trust that the ratings you see reflect meaningful standards that help you find the right fit for lasting recovery.
8.2
Out of 10
Harbor Care, which is situated in Nashua, New Hampshire, provides a comprehensive array of services to individuals who are grappling with a variety of health and social obstacles. The center offers specialized services for children, adolescents, veterans, and individuals experiencing housing instability, as well as serving men and women aged 18 and older. Harbor Care addresses the comprehensive requirements of its patients by integrating healthcare with lodging and other social services.
The facility offers a range of behavioral health services, such as crisis intervention, substance use disorder treatment, and outpatient mental health care. The center provides a diverse array of outpatient programs, including individual, group, and family therapy, in addition to its FDA-approved medication-assisted treatment (MAT) for addiction recovery. Cognitive behavioral therapy (CBT), dialectical behavioral therapy (DBT), and trauma-informed care are among the primary therapeutic approaches implemented.
Harbor Care’s facilities encompass a Health and Wellness Center, which provides patients with access to primary care, preventive services, and behavioral health care. To guarantee a more comprehensive range of services, they are accessible through both in-person and telehealth options. The center’s comprehensive approach encompasses the provision of housing support, dental care, and services for individuals with HIV/AIDS, as well as the consideration of social determinants of health.
Harbor Care’s dedication to patient-centered and high-quality care is evidenced by its accreditations from The Joint Commission, CARF, and NCQA. In addition, the organization is acknowledged for its participation in HRSA’s National Health Service Corps, which guarantees that all patients receive care, irrespective of their financial capabilities.
Treatment Options
The facility offers multiple levels of care, such as:
- Mentoring/peer support
- Housing services
- Discharge Planning
- Employment counseling or training
- Self-help groups
- Naloxone and overdose education
- Recovery coach
The center treats the following addictions and co-occurring disorders:
- Clients with co-occurring mental and substance use disorders
- Pregnant/postpartum women
- Clients who have experienced trauma
- Screening for tobacco use
- Comprehensive substance use assessment
- Outreach to persons in the community
- Screening for mental disorders
- Screening for substance use
- Complete medical history/physical exam
- Comprehensive mental health assessment
Treatment Modalities
- Cognitive behavioral therapy
- Substance use disorder counseling
- Trauma-related counseling
- Smoking/vaping/tobacco cessation counseling
- Group counseling
- Family counseling
- Marital/couples counseling
- 12-step facilitation
- Intervention Services
- Contingency management/motivational incentives
- Motivational interviewing
- Anger management
- Matrix Model
- Relapse prevention
- Individual psychotherapy
Conditions Treated
- Alcoholism
- Mental health treatment
- Substance use treatment
- Co-occurring Disorders
Levels Of Care
- Hospital inpatient treatment
- Outpatient
- Short-term residential
- Long-term residential
- Outpatient methadone/buprenorphine or naltrexone treatment
- Regular outpatient treatment
- Aftercare
License and Accreditation
- Commission on Accreditation of Rehabilitation Facilities (CARF)
Ancillary Services
- Case management service
- Integrated primary care services
- Suicide prevention services
- Residential beds for client’s children
- Acupuncture
- Child care for client’s children
- Early intervention for HIV
- Mental health services
- Social skills development
- Transportation assistance
Hope Without Commitment
Find the best treatment options. Call our free and confidential helpline.
Most private insurances accepted