Our story.
At the Stem Cell Institute, science doesn’t replace compassion–it elevates it.
View Our History
Founded by Dr. Neil Riordan, a pioneer in regenerative medicine, our mission is rooted in a simple yet profound belief: every patient deserves access to science-backed, ethically delivered stem cell therapies.
For more than two decades, the name Riordan has been synonymous with scientific leadership in regenerative medicine. From pioneering research in mesenchymal stem cell (MSC) biology to the development of proprietary Golden Cells™, Riordan’s discoveries have shaped the global understanding of cellular therapy.
Stem Cell Institute represents the next chapter, an evolution from a single institute to a growing network of regenerative medicine centers dedicated to delivering this science to patients safely and consistently.
Every protocol, every treatment, and every patient experience reflects the same unwavering principles: evidence, ethics, and excellence.
While our reach continues to grow, our mission remains the same: to bring the promise of regenerative medicine to life through proven science, compassionate care, and a relentless pursuit of better outcomes.

Healing through science, compassion, leadership, trust, and innovation.
The Stem Cell Institute team
At the Stem Cell Institute, exceptional care starts with an exceptional team. Our doctors combine advanced clinical expertise with a deep commitment to compassionate care. Backed by a dedicated support staff, we’re here to guide and support you before, during, and after your treatment.

Neil Riordan, PA, PhD
Chairman of the Board & Founder

Jorge Paz-Rodriguez, MD
Board Member & Medical Director

Rodolfo Fernández, MT
Board Member & Lab Director

Gabriel Dutari
Chief Executive Officer

Silvia Molina
Chief Operating Officer

Marialaura Madrigal, PhD
Director of Research & Development

Tabatha Rosas
Director of Finance

Steve Rivers
Chief Financial Officer

Julio Sierra, MD
Clinic Director