Toyin Ajayi

Co-Founder & CEO at Cityblock Health

Prior to Cityblock, Toyin served as Chief Medical Officer of Commonwealth Care Alliance. In this role, she led all clinical operations; spearheaded care delivery innovations; and oversaw multi-disciplinary teams of more than 500 clinicians, community health workers, and administrators, serving more than 20,000 beneficiaries across the state of Massachusetts. Toyin received her undergraduate degree from Stanford University; an MPhil from the University of Cambridge; and her medical degree, with Distinction in Clinical Practice, from King’s College London School of Medicine. Having completed her residency training at Boston Medical Center, Toyin is a board-certified family physician and continues to practice primary care and hospital medicine focused on patients with chronic, complex, and end-of-life needs. Internationally recognized as a leader in care for populations with complex needs, Toyin advises organizations such as the Center for Health Care Strategies, the Commonwealth Fund, and Institute for Healthcare Improvement.



  • Co-Founder & CEO

    March, 2022 - present

  • President

    June, 2017

  • Chief Health Officer

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