• 579 Franklin Avenue Brooklyn, NY 11238
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About IS43 – Nationwide Substance Abuse Recovery & Reintegration Provider

IS43 is a social impact–driven behavioral health organization delivering evidence-based addiction treatment, supportive housing, and long-term recovery services across high-need U.S. markets.

0 M+

Americans affected by Substance Use Disorder

0 %

lack access to specialty treatment

0 %

housing retention at 12 months

0

overdoses or ER visits in first 90 days

Our Focused

Recovery as Community Infrastructure

IS43 operates licensed substance abuse recovery clinics providing integrated clinical care, behavioral health services, and residential support to break cycles of addiction, homelessness, and justice-system involvement.

Case Management & Recovery Planning

Personalized care coordination connecting residents to medical treatment, legal support, recovery coaching, family services, and long-term reintegration resources.

Behavioral Health & Clinical Services

Evidence-based individual and group counseling, relapse prevention, medication support, and on-site medical supervision.

Supportive Housing & Residential Recovery

Premium, fully staffed recovery residences providing 24-hour care, clinical oversight, and structured daily programming.

Recovery Stories

Real Recovery Stories from IS43 Residents

Measurable outcomes proving that recovery and stability are achievable at scale.

Meet the Leadership Behind IS43 Healthcare

Martin Assoumou – CEO

  • Former Chevron Trading Manager, World Bank Program Director, and Columbia University–trained engineer with over 50 years of leadership across global markets, government programs, and entrepreneurship.
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Gwendolyn N. Davis – Operations Manager

  • Pioneering IT executive and former Deputy CIO with decades of experience securing and managing large-scale government contracts and public-sector systems.
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Adekola Adelaja – Project Manager

  • Seasoned Project Business Analyst and Management Consultant with 15+ years across real estate, energy, technology, and business growth consulting.
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“Based in Brooklyn. Operating across New York City.”

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