Toyin Ajayi is a Nigerian-born physician and healthcare entrepreneur whose success story is closely tied to reshaping how primary care is delivered to underserved communities in the United States. She is the co-founder and CEO of Cityblock Health, a company built around the idea that healthcare systems must actively address both medical needs and the social conditions that shape health outcomes.

Ajayi’s journey began in medicine, where she trained as a family physician and worked directly with patients facing complex, long-term health challenges. She previously served as Chief Medical Officer at Commonwealth Care Alliance, where she led clinical operations for thousands of low-income and dual-eligible Medicare-Medicaid patients.

That experience exposed her to a recurring problem in healthcare: many patients kept cycling in and out of hospitals because their underlying social needs—such as housing instability, food insecurity, and lack of access to consistent care—were not being addressed.

This insight became the foundation for Cityblock Health, which she co-founded in 2017. The company was designed to break away from traditional, reactive healthcare models and instead provide “whole-person care.” Cityblock combines primary care, behavioral health, and social services into one integrated system, supported by technology and community-based care teams.

Rather than waiting for patients to come to clinics, care teams often engage patients in their homes and communities, building long-term trust and continuity.

Under Ajayi’s leadership, Cityblock has grown into a multi-billion-dollar healthcare organization serving Medicaid and Medicare populations in multiple U.S. states.

The company operates on a value-based care model, meaning it is financially rewarded for improving patient outcomes and reducing avoidable hospital visits rather than simply increasing the volume of services delivered.

This model has made Cityblock a standout example in U.S. healthcare innovation, particularly for populations that have historically been underserved by the system.

A major part of her success story is her focus on trust and accessibility. Ajayi has emphasized that many patients in marginalized communities have experienced barriers or discrimination in healthcare settings, and that effective care must begin with rebuilding trust. Cityblock’s approach reflects this philosophy by integrating community health workers, personalized outreach, and continuous engagement rather than episodic treatment.

Today, she is widely recognized as a leader in value-based healthcare and health equity reform. Her work has helped position Cityblock Health as one of the most prominent examples of a healthcare system built specifically for Medicaid and Medicare populations, demonstrating that high-quality care for underserved communities can also be scalable and financially sustainable.

Toyin Ajayi’s success story is not just about founding a company, but about redefining what healthcare delivery can look like when it is designed around the needs of the most vulnerable patients rather than the most profitable ones.