Todd P. Lewis studies how well health systems meet the needs of the populations they serve. His research examines how differences in health system quality shape public confidence in health systems, engagement with care, and health outcomes. He develops population-based approaches to measuring health system performance and investigates why some health systems consistently deliver higher quality care than others, with a particular focus on primary care.
Lewis leads the People’s Voice Survey (PVS), a nationally representative, multi-country survey measuring health system performance from the public’s perspective. Implemented in more than 25 countries and increasingly used by ministries of health for routine quality monitoring, the PVS has generated comparable, cross-national evidence on patient experience, population endorsement of health systems, and primary care quality. He is a lead researcher with the QuEST Network, a global consortium advancing evidence to improve health system performance.
Before joining Washington University, Lewis was a research associate at the Harvard T.H. Chan School of Public Health, where he also earned his PhD in population health sciences with a specialization in health systems.
Areas of focus:
- Health systems
- Primary care
- Patient experience
- Global health
Featured publications
- User-reported quality of care: findings from the first round of the People’s Voice Survey in 14 countries
The Lancet Global Health
January 2024 - Health service quality in 2929 facilities in six low-income and middle-income countries: a positive deviance analysis
The Lancet Global Health
June 2023 - Population expectations of primary care quality in 18 countries: a cross-sectional analysis of data from the People’s Voice Survey
The Lancet Primary Care
May 2026 - Clinical performance among recent graduates in nine low- and middle-income countries
Tropical Medicine and International Health
February 2019