Caitlin Ryus, MD, MPH
Assistant Professor of Emergency MedicineCards
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Co-Director of Yale Emergency Scholars Fellowship, Emergency Medicine
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Are You a Patient?
View this doctor's clinical profile on the Yale Medicine website for information about the services we offer and making an appointment.
View Doctor ProfileAdditional Titles
Co-Director of Yale Emergency Scholars Fellowship, Emergency Medicine
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Are You a Patient?
View this doctor's clinical profile on the Yale Medicine website for information about the services we offer and making an appointment.
View Doctor ProfileAdditional Titles
Co-Director of Yale Emergency Scholars Fellowship, Emergency Medicine
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About
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Titles
Assistant Professor of Emergency Medicine
Co-Director of Yale Emergency Scholars Fellowship, Emergency Medicine
Biography
Dr. Caitlin Ryus is an Assistant Professor in Emergency Medicine and Co-Director of the Yale Emergency Scholars Fellowship. She is a NIDA-funded Yale-Drug use, Addiction, and HIV prevention Research K12 Scholar (DAHRS) and is dual board-certified in Emergency Medicine and Addiction Medicine. Dr. Ryus earned her bachelor’s in psychology from Bryn Mawr College and MPH from Columbia University with a concentration in socio-medical sciences. Dr. Ryus received her MD from the Warren Alpert Medical School of Brown University and completed her emergency medicine residency and research fellowship through the Yale Emergency Scholars Program.
Her research integrates the disciplines of community-engaged research methods, health services research, and political epidemiology to examine how structural forces shape emergency care access and outcomes among unhoused patients and patients with substance use disorders. She is MPI on a National Institute of Nursing Research R01 examining the effects of non-congregate shelter modalities on psychiatric emergencies.
Dr. Ryus serves as Vice President of the Downtown Evening Soup Kitchen (DESK) and leads the Yale ED Homelessness Task Force– an interdisciplinary team of community organizations, government representatives, street medics, social workers, and people with lived experience of homelessness dedicated to improving ED care among unhoused patients in New Haven. She was honored with the 2026 Social Medicine Advocacy Award from the Academy of Women in Academic Emergency Medicine.
Appointments
Emergency Medicine
Assistant ProfessorPrimary
Other Departments & Organizations
Education & Training
- Yale Emergency Scholars Fellowship
- Yale School of Medicine (2022)
- Residency
- Yale New Haven Hospital (2021)
- MD
- Warren Alpert Medical School of Brown University (2017)
- MPH
- Columbia University Mailman School of Public Health, Socio-Medical Sciences (2010)
- BA
- Bryn Mawr College, Psychology (2006)
Advanced Training & Certifications
- Addiction Medicine Board Certification
- American Board of Preventative Medicine (2026)
- Emergency Medicine Board Certified
- American Board of Emergency Medicine (2022)
Research
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Overview
Medical Research Interests
Public Health Interests
ORCID
0000-0001-5526-030X
Research at a Glance
Yale Co-Authors
Publications Timeline
Research Interests
Gail D'Onofrio, MD, MS
David Yang, MD, MHS
Gunjan Tiyyagura, MD, MHS
Rebekah Heckmann, MD, MPH, MPA
Kathryn Hawk, MD, MHS
Ambrose Wong, MD, MSEd, MHS
Intimate Partner Violence
Housing Instability
Housing
Emergency Medicine
Ill-Housed Persons
Publications
Featured Publications
Examining trends in emergency medicine journals' publications about racism
Ryus C, Yang D, Brackett A, Barnett L, Boatright D. Examining trends in emergency medicine journals' publications about racism. Academic Emergency Medicine 2024, 31: 339-345. PMID: 38097532, DOI: 10.1111/acem.14852.Peer-Reviewed Original ResearchAltmetricEmergency Department Use Among Recently Homeless Adults in a Nationally Representative Sample
Ryus C, Stefanovics E, Tsai J, Rhee T, Rosenheck R. Emergency Department Use Among Recently Homeless Adults in a Nationally Representative Sample. Western Journal Of Emergency Medicine 2023, 0: 894-905. PMID: 37788030, PMCID: PMC10527843, DOI: 10.5811/westjem.59054.Peer-Reviewed Original ResearchCitationsA National Snapshot of Social Determinants of Health Documentation in Emergency Departments
Ryus C, Janke A, Granovsky R, Granovsky M. A National Snapshot of Social Determinants of Health Documentation in Emergency Departments. Western Journal Of Emergency Medicine 2023, 0: 680-684. PMID: 37527393, PMCID: PMC10393461, DOI: 10.5811/westjem.58149.Peer-Reviewed Original ResearchCitationsAltmetricMeSH Keywords and ConceptsConceptsED visitsClinical conditionsSocial determinantsEmergency department patient populationNationwide Emergency Department SampleZ codesED visit dataHospital-level factorsEmergency Department SampleUnadjusted odds ratioRepeated cross-sectional analysisAlcohol-related disordersSelf-pay patientsUrban-rural statusCross-sectional analysisED dispositionGovernment-run hospitalsED patientsEmergency departmentPatient populationInsurance statusDepressive disorderInpatient chartsOdds ratioDelivery system reformAssociation of Hospital Discharge Against Medical Advice and Coded Housing Instability in the US
Ryus C, Janke A, Kunnath N, Ibrahim A, Rollings K. Association of Hospital Discharge Against Medical Advice and Coded Housing Instability in the US. Journal Of General Internal Medicine 2023, 38: 3082-3085. PMID: 37369893, PMCID: PMC10593638, DOI: 10.1007/s11606-023-08240-1.Peer-Reviewed Original ResearchCitationsAltmetricAssociation of Coded Housing Instability and Hospitalization in the US
Rollings K, Kunnath N, Ryus C, Janke A, Ibrahim A. Association of Coded Housing Instability and Hospitalization in the US. JAMA Network Open 2022, 5: e2241951. PMID: 36374498, PMCID: PMC9664259, DOI: 10.1001/jamanetworkopen.2022.41951.Peer-Reviewed Original ResearchCitationsAltmetricMeSH Keywords and ConceptsConceptsCommon reasonPrimary diagnosisNeurodevelopmental disordersSocial determinantsHousing instabilityNational Inpatient SampleHospitalization of patientsLength of stayCross-sectional studyHigher admission ratesCirculatory system diseasesTimes greater oddsInpatient hospital utilizationHospital stayPatient characteristicsPrimary outcomeHospitalization costsRetrospective studyInpatient admissionsMean ageInpatient SampleAdmission ratesHospital utilizationMedical adviceHospitalizationUsing community‐based participatory research methods to inform care for patients experiencing homelessness: An opportunity for resident education on health care disparities
Ryus CR, Yang D, Tsai J, Meldrum J, Ngaruiya C. Using community‐based participatory research methods to inform care for patients experiencing homelessness: An opportunity for resident education on health care disparities. AEM Education And Training 2021, 5: s121-s125. PMID: 34616985, PMCID: PMC8480493, DOI: 10.1002/aet2.10681.Peer-Reviewed Original ResearchCitationsAltmetricConceptsCommunity-based participatory researchHealth disparitiesVulnerable patient groupCommunity-based participatory research methodsHealth care disparitiesSignificant medical concernLocal health disparitiesED careED physiciansPatient groupMedicine useChronic illnessHigh burdenCare disparitiesHealth outcomesPEH experiencesPremature deathDisproportionate burdenComplex social needsMedical concernsCareGraduate Medical EducationMeasure outcomesEM residentsCOVID-19 pandemicIntimate partner violence screening during COVID-19
Hoffman R, Ryus C, Tiyyagura G, Jubanyik K. Intimate partner violence screening during COVID-19. PLOS ONE 2023, 18: e0284194. PMID: 37093791, PMCID: PMC10124835, DOI: 10.1371/journal.pone.0284194.Peer-Reviewed Original ResearchCitationsMeSH Keywords and ConceptsConceptsVisitor restriction policiesEmergency departmentIPV screeningIntimate partner violenceTertiary care center emergency departmentRetrospective cross-sectional studyCOVID-19COVID-19 pandemicIntimate partner violence screeningChi-squareCenter emergency departmentPartner violence screeningCross-sectional studyLogistic regression modelsBinary logistic regression modelPrimary outcomeVisitor restrictionsPositive screenViolence screeningBivariate analysisDemographic characteristicsPatientsT-testRestriction policiesScreeningProtecting Survivors of Intimate Partner Violence Under the Cures Act
Shum M, Ryus C, Chen P, Powers E, Jubanyik K, Tiyyagura G. Protecting Survivors of Intimate Partner Violence Under the Cures Act. Annals Of Emergency Medicine 2023, 81: 761-763. PMID: 36870889, PMCID: PMC10200723, DOI: 10.1016/j.annemergmed.2023.01.017.Peer-Reviewed Original ResearchCitationsAltmetricMeSH KeywordsA New Syndemic: Complications of Opioid Use Disorder During a Heat Wave.
Ryus C, Bernstein SL. A New Syndemic: Complications of Opioid Use Disorder During a Heat Wave. Journal Of Health Care For The Poor And Underserved 2022, 33: 1671-1677. PMID: 36245188, DOI: 10.1353/hpu.2022.0092.Peer-Reviewed Original ResearchCitationsAltmetricMeSH Keywords and ConceptsConceptsOpioid use disorderUse disordersOpioid crisisHealth care providersHeat-related illnessOpioid useAccidental overdosesCase seriesCare providersCare practicesRisk of useGreater riskHarm reduction initiativesDisordersComplicationsDeathIllnessInadequate accessRiskParticular vulnerabilityExcess burdenFurther researchPatientsProvidersOverdosesBurnout and Perception of Medical School Learning Environments Among Gay, Lesbian, and Bisexual Medical Students
Ryus CR, Samuels EA, Wong AH, Hill KA, Huot S, Boatright D. Burnout and Perception of Medical School Learning Environments Among Gay, Lesbian, and Bisexual Medical Students. JAMA Network Open 2022, 5: e229596. PMID: 35486396, PMCID: PMC9055452, DOI: 10.1001/jamanetworkopen.2022.9596.Peer-Reviewed Original ResearchCitationsAltmetricMeSH Keywords and ConceptsConceptsMedical school learning environmentSchool learning environmentLearning environmentSM studentsStudents' perceptionsMedical studentsLesbian studentsBisexual studentsHeterosexual studentsAllopathic US medical schoolsMedical students' perceptionsMedical school environmentAAMC Graduation QuestionnaireUS medical schoolsFavorable perceptionsAmerican Medical CollegesGraduation QuestionnaireSchool environmentMedical schoolsStudentsOldenburg Burnout InventoryHigh burnout symptomsMedical CollegePerceptionBurnout symptoms
Academic Achievements & Community Involvement
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Activities
activity Downtown Evening Soup Kitchen
07/01/2022 - PresentPublic ServiceBoard of Directors
Clinical Care
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Overview
Caitlin Ryus, MD, MPH, is an emergency physician at Yale Medicine with a focus on health equity, substance use disorders, and improving care for marginalized populations, particularly those experiencing homelessness. In her role, she treats a broad range of critical medical conditions, responding to patients in acute distress as well as those who experience barriers to routine care.
"I chose emergency medicine because it is a specialty that combines clinical care with public health." Dr. Ryus says. "What I find most rewarding is the ability to make an immediate impact, whether that’s providing life-saving interventions or connecting patients to services that address the root causes of their health issues."
As the co-director of the Yale Emergency Scholars Fellowship, she trains future leaders in academic emergency medicine, fostering their clinical skills alongside their research development.
Caitlin Ryus, MD, MPH is an assistant professor of Emergency Medicine at Yale School of Medicine.
Board Certifications
Emergency Medicine
- Certification Organization
- AB of Emergency Medicine
- Original Certification Date
- 2022
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