Honolulu, HI

KLINE-WELSH BEHAVIORAL HEALTH FOUNDATION

EIN 99-0149414

Health & Wellness Addiction Treatment & Recovery People experiencing homelessness Veterans & military families Justice-involved people Low-income

Mission

To provide long-term, residential behavioral health and substance use disorder treatment for service-resistant adults, helping people rebuild stable, productive lives through sustained clinical care, counseling, and life-skills supports.

IRS-recognized 501(c)(3) public charity Contributions are tax-deductible

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About KLINE-WELSH BEHAVIORAL HEALTH FOUNDATION

KLINE-WELSH BEHAVIORAL HEALTH FOUNDATION is the legal nonprofit that operates the Sand Island Treatment Center, a long-term residential treatment program in Honolulu established in the early 1960s. The Foundation focuses on adults with severe substance use disorders and co-occurring mental health conditions who have often failed in shorter-term programs or are referred from the criminal justice system.

The organization provides a multi-year continuum of care combining residential housing, counseling, peer-led recovery support, vocational and life-skills training, and care coordination with public agencies. It is recognized locally and nationally for serving high-need, service-resistant populations and for maintaining accreditation and contracts with state and health partners to deliver residential addiction treatment at scale.

Notable achievements

Longstanding residential program (60+ years)

Operates a sustained, long-term residential continuum of care since the 1960s, serving clients who are chronically homeless, justice-involved, or have failed in other treatment settings.

Accreditation and quality standards

Has repeatedly earned three-year accreditation reviews from the Commission on Accreditation of Rehabilitation Facilities (CARF) and meets Hawaii State Department of Health standards for licensed special treatment facilities.

Operational scale and financial sustainability

Maintains multi-million-dollar annual program operations supported by program service revenue, state contracts, and contributed support, enabling multi-year residential placements for high-need clients.

At a glance

Total assets: $2.5M
Annual revenue: $4.3M
Tax status: 501(c)(3)Public charity
EIN: 99-0149414
Location: Honolulu, HI
Website: sandisland.org
On Mahalo since: September 2026

Financial figures from the IRS Business Master File, the IRS’s registry of tax-exempt organizations.

Recognition

CARF three‑year accreditation for substance use disorder residential treatment.

Recognized/licensed by the Hawaii State Department of Health Alcohol & Drug Abuse Division (ADAD) as a residential treatment provider.

Listed in national treatment directories (SAMHSA directories) and identified locally as a preferred provider by major Hawaii insurers.

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