Chima D Ndumele, MPH, PhD
Department Chair and Professor of Public Health (Health Policy) and Professor in the Institution for Social and Policy StudiesDownloadHi-Res Photo
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Department Chair and Professor of Public Health (Health Policy) and Professor in the Institution for Social and Policy Studies
Biography
Chima Ndumele is an Associate Professor of Public Health (Health Policy) at the Yale School of Public Health. His research is focused on better understanding factors which influence the way vulnerable populations connect with and access health care resources. Specifically, he conducts work in three areas. The first examines how changes in local policy environment impact the care received by Medicaid enrollees. The second area explores how safety-net organizations can improve health care services delivery. Finally, he investigates the effects of changes in insurance coverage on the quality of care received by individuals with chronic physical and mental health conditions. He received his PhD from the Brown University School of Public Health
Last Updated on June 02, 2025.
Appointments
Health Policy & Management
ChairDualHealth Policy & Management
ProfessorPrimaryInstitution for Social and Policy Studies
ProfessorSecondary
Other Departments & Organizations
Education & Training
- PhD
- Brown University (2013)
Research
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Overview
Public Health Interests
Health Care Management; Health Equity, Disparities, Social Determinants and Justice; Chronic Diseases; Community Health; Health Policy
ORCID
0000-0002-4887-0043
Research at a Glance
Yale Co-Authors
Frequent collaborators of Chima D Ndumele's published research.
Publications Timeline
A big-picture view of Chima D Ndumele's research output by year.
Jacob Wallace, PhD
Harlan Krumholz, MD, SM
Yuan Lu, ScD
Rohan Khera, MD, MS
Yuntian Liu, MPH
Ania Jastreboff, MD, PhD
15Publications
187Citations
Publications
2025
Medicaid: Increased Patient Access To MOUD In Residential Treatment Associated With Facility Openings And Closures, 2012–22
Beetham T, Newton H, Ndumele C, Fiellin D, Busch S. Medicaid: Increased Patient Access To MOUD In Residential Treatment Associated With Facility Openings And Closures, 2012–22. Health Affairs 2025, 44: 1122-1130. PMID: 40893069, DOI: 10.1377/hlthaff.2025.00348.Peer-Reviewed Original ResearchCitationsAltmetricMeSH Keywords and ConceptsConceptsMedicaid patients' accessDifference-in-differences frameworkResidential addiction treatmentIntervention statesResidential addiction treatment facilityMOUD availabilityPolicy effectsProvider entrySurvey dataMedicaid fundingMedicaid participationMedicaid beneficiariesPolicyAddiction treatment facilitiesMedicaidTreatment marketAddiction treatmentWaiverOpioid use disorderMedicaid patientsMOUDUse disorderStateFacility entryBeneficiariesHospitalization and Credit Scores Among Medicaid Beneficiaries in Louisiana
Walker B, Compta G, Siebert A, Anderson A, Callison K, Ndumele C, Wallace J. Hospitalization and Credit Scores Among Medicaid Beneficiaries in Louisiana. JAMA Health Forum 2025, 6: e251570. PMID: 40478557, PMCID: PMC12144616, DOI: 10.1001/jamahealthforum.2025.1570.Peer-Reviewed Original ResearchAltmetricSNAP Work Requirements Reversal and Program Enrollment
Factor H, Wallace J, Lavallee M, Lollo A, Ndumele C. SNAP Work Requirements Reversal and Program Enrollment. JAMA Health Forum 2025, 6: e251587. PMID: 40445600, PMCID: PMC12125636, DOI: 10.1001/jamahealthforum.2025.1587.Peer-Reviewed Original ResearchAltmetricSupplemental Nutrition Assistance Program Work Requirements and Safety-Net Program Participation
Ndumele C, Factor H, Lavallee M, Lollo A, Wallace J. Supplemental Nutrition Assistance Program Work Requirements and Safety-Net Program Participation. JAMA Internal Medicine 2025, 185: 92-100. PMID: 39495527, PMCID: PMC11536301, DOI: 10.1001/jamainternmed.2024.5932.Peer-Reviewed Original ResearchCitationsAltmetricConceptsSupplemental Nutrition Assistance ProgramSNAP work requirementsAble-bodied adultsChronic conditionsCharacteristics of individualsLow-incomeCohort studyMedicaid coverageNutrition Assistance ProgramSocioeconomic characteristics of individualsProportion of enrolleesChronic illnessMain OutcomesProgram enrollmentMedicaid enrolleesYounger beneficiariesSocioeconomic characteristicsMedicaidStatistically significant changesTarget populationEnrolleesAssistance programsCaregiversSafety-net programsBeneficiariesAttributing Racial Differences in Care to Health Plan Performance or Selection
Wallace J, Ndumele C, Lollo A, Macambira D, Lavallee M, Green B, Duchowny K, McWilliams J. Attributing Racial Differences in Care to Health Plan Performance or Selection. JAMA Internal Medicine 2025, 185: 61-72. PMID: 39585673, PMCID: PMC11589859, DOI: 10.1001/jamainternmed.2024.5451.Peer-Reviewed Original ResearchCitationsAltmetricConceptsEmergency department visitsPrimary care visitsCross-sectional studyDepartment visitsCare visitsRacial differencesWhite enrolleesMagnitude of racial differencesHealth equity metricHealth care disparitiesWhite Medicaid enrolleesSelection biasSouthern US statesPlanning indicatorsPrescription drug useCare disparitiesSelf-identified blacksHealth plansMain OutcomesEffectiveness of planningPublic reportingAdministrative claimsRandom populationMedicaid populationMedicaid enrollees
2024
Racial and Ethnic Disparities in Age-Specific All-Cause Mortality During the COVID-19 Pandemic
Faust J, Renton B, Bongiovanni T, Chen A, Sheares K, Du C, Essien U, Fuentes-Afflick E, Haywood T, Khera R, King T, Li S, Lin Z, Lu Y, Marshall A, Ndumele C, Opara I, Loarte-Rodriguez T, Sawano M, Taparra K, Taylor H, Watson K, Yancy C, Krumholz H. Racial and Ethnic Disparities in Age-Specific All-Cause Mortality During the COVID-19 Pandemic. JAMA Network Open 2024, 7: e2438918. PMID: 39392630, PMCID: PMC11581672, DOI: 10.1001/jamanetworkopen.2024.38918.Peer-Reviewed Original ResearchCitationsAltmetricMeSH Keywords and ConceptsConceptsCOVID-19 public health emergencyNon-HispanicPublic health emergencyOther Pacific IslanderExcess mortalityAlaska NativesUS populationExcess deathsRates of excess mortalityCross-sectional study analyzed dataYears of potential lifeMortality relative riskNon-Hispanic whitesCross-sectional studyPacific IslandersStudy analyzed dataAll-Cause MortalityEthnic groupsMortality disparitiesMortality ratioTotal populationDeath certificatesEthnic disparitiesMain OutcomesDecedent ageAlternative Payment Models and Performance in Federally Qualified Health Centers
Markowski J, Wallace J, Schlesinger M, Ndumele C. Alternative Payment Models and Performance in Federally Qualified Health Centers. JAMA Internal Medicine 2024, 184: 1065-1073. PMID: 38976258, PMCID: PMC11231906, DOI: 10.1001/jamainternmed.2024.2754.Peer-Reviewed Original ResearchCitationsAltmetricConceptsPayment modelsMeasures of health care qualityPayer mixFederally Qualified Health CentersCohort studyValue-based payment modelsHealth care safety netColorectal cancer screeningHealth promotion modelHealth care qualityQualified health centersUniform Data SystemHealth outcome measuresAlternative payment modelsRisk profileFQHC patientsAssociated with clinicCare qualityChild BMIAdult BMICancer screeningState Medicaid programsIncentivizing qualityHealth centersRetrospective cohort study
2023
Eligibility for Cardiovascular Risk Reduction Therapy in the United States Based on SELECT Trial Criteria: Insights From the National Health and Nutrition Examination Survey
Lu Y, Liu Y, Jastreboff A, Khera R, Ndumele C, Rodriguez F, Watson K, Krumholz H. Eligibility for Cardiovascular Risk Reduction Therapy in the United States Based on SELECT Trial Criteria: Insights From the National Health and Nutrition Examination Survey. Circulation Cardiovascular Quality And Outcomes 2023, 17: e010640. PMID: 37950677, PMCID: PMC10782930, DOI: 10.1161/circoutcomes.123.010640.Peer-Reviewed Original ResearchCitationsAltmetricVariation in Procedural Denials of Medicaid Eligibility Across States Before the COVID-19 Pandemic
Schpero W, Brahmbhatt D, Liu M, Ndumele C, Chatterjee P. Variation in Procedural Denials of Medicaid Eligibility Across States Before the COVID-19 Pandemic. JAMA Health Forum 2023, 4: e233892. PMID: 37976050, PMCID: PMC10656645, DOI: 10.1001/jamahealthforum.2023.3892.Peer-Reviewed Original ResearchCitationsAltmetricAfter 50 Years, Health Professional Shortage Areas Had No Significant Impact On Mortality Or Physician Density
Markowski J, Wallace J, Ndumele C. After 50 Years, Health Professional Shortage Areas Had No Significant Impact On Mortality Or Physician Density. Health Affairs 2023, 42: 1507-1516. PMID: 37931191, DOI: 10.1377/hlthaff.2023.00478.Peer-Reviewed Original ResearchCitationsAltmetricMeSH Keywords and Concepts
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- July 18, 2025
New Work Requirements for SNAP Benefits Could Hurt Families
- July 02, 2025Source: NPR
Hidden costs of Medicaid work requirements called 'astronomical'
- June 12, 2025
Dr. Chima Ndumele Appointed Chair of the Department of Health Policy and Management
- December 20, 2024Source: Yale News
Real-time solutions: Yale unites scholars, policymakers to improve Medicaid
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