Publications

2025

• Park S*, Eggleston K, Do Y, Cutler D. Income inequalities in the health systems of the United States and South Korea. JAMA Health Forum. Forthcoming

• Park S*, Yu J, Jung H. Utilization of in-person and telehealth services among U.S. adults with loneliness and social isolation. Journal of Epidemiology and Community Health. Forthcoming

• Bae G, Ko H, Lee H, Park S*. Impact of health insurance expansion on patients' financial burden and family well-being in South Korea. Economics and Human Biology. Forthcoming

• Park S*, Ortega AN, Chen J, Mortensen K, Bustamante AV. The direct and indirect costs of food insecurity among working-age adults in the US. American Journal of Managed Care. Forthcoming

• Park S*, Fung V. Health care affordability problems by income level and subsidy eligibility in Medicare. JAMA Network Open. Forthcoming

• Park S*, Eggleston K, Do Y, Cutler D. Income-related disparities in the value of health care in South Korea. Health Affairs Scholar. Forthcoming

• Kim J, Kim Y*, Park S, Heflin C, Kim H, Li Y. Trends in breast cancer screening between Medicare beneficiaries with and without food insecurity. AJPM Focus. Forthcoming

• Park S*, Berkowitz SA. The role of patient-clinician communication among U.S. adults with food insecurity. American Journal of Preventive Medicine. Forthcoming

• Park S*, Dieleman JL, Kim R, Subramanian SV. Association of health and social spending with disability-adjusted life years and mortality across 37 OECD countries. Health Services Research. Forthcoming

• Kim J, Kim Y, Park S, Kim H, Li Y. Factors associated with receipt of caregiver training among informal caregivers of people living with dementia. Aging and Health Research. Forthcoming

• Stimpson JP, Park S, Gurley T, Wilson FA. Examining employment status, paid sick leave, and access to care in relation to colorectal cancer screening among U.S. workers: A structural equation modeling approach. Cancer Control. Forthcoming

• Stimpson JP, Park S, Adhikari EH, Nelson DB, Ortega AN. Perceived Health Misinformation on Social Media and Public Trust in Healthcare. Medical Care. Forthcoming

• Park S*, Koh KA, Liu M, Wadhera RK. Medicare eligibility and health care utilization among adults with severe symptoms of mental illness. JAMA Health Forum. Forthcoming

• Park S*, Chen J, Bustamante AV, Ortega AN. Does low-value care explain health care utilization inequities among Asian and Latino populations? Health Services Research. Forthcoming

• Staton E, Park S*. Associations of Medicare Advantage enrollment duration with health insurance literacy and access to and affordablity of health care. Journal of General Internal Medicine. Forthcoming

• Bae G, Park S*. Factors associated with health care spending among adults in South Korea. Journal of General Internal Medicine. Forthcoming

• Stimpson JP, Park S, Srivastava A, Cano MA. Belief that progress has been made in curing cancer varies by perception of social media health mis- and disinformation, education, frequency of social media use, and healthcare system trust: cross-sectional study. Cancer Control. Forthcoming

• Park S*, Meyers DJ, Park Y, Trivedi AN. Financial burden of care greatest among rural beneficiaries in Medicare advantage. Health Services Research. Forthcoming

• Park S*, Nguyen AM, Zoe L, Chang JE. Patient-provider communication for lonely, socially isolated adults in Medicare. American Journal of Preventive Medicine. 2025; 68(5): 905-913.

• Park S*, Berkowitz SA. Association of food insecurity with mental health status, mental health services utilization, and general health care utilization among US adults. Journal of Epidemiology and Community Health. 2025; 79(5): 332-339.

• Park S*, Stimpson JP. Effects of Medicare eligibility at age 65 among individuals with and without functional disability. Journal of General Internal Medicine. 2025; 40(5): 1132-1140. 

• Park S*, Stimpson JP, Fendrick M. Health care utilization patterns among US adults with and without functional disabilities. JAMA Network Open. 2025; 8(4): e254729.

• Park S*, Alegria M, Bustamante AV, Chen J, Fung V, Ortega AN. Differences in mental health symptoms and inequities in mental health services use among Black and White population and Asian and Latino subpopulation groups in the United States. Journal of General Internal Medicine. 2025; 40(3): 569-578.

• Park S*, Jung H, Yu J. Telehealth availability and use among beneficiaries in Traditional Medicare and Medicare Advantage. Journal of the American Geriatrics Society. 2025; 73(2): 545-551.

• Park S*, Dieleman JL, Weaver M, Bae G, Eggleston KN. Health care spending increases and value in South Korea. JAMA Health Forum. 2025; 6(1): e245145.

• Koh K,* Park S. Effects of the Medicaid coverage cliff on low-income elderly Medicare beneficiaries. Health Economics. 2025; 34(1): 105-153.

2024

• Mokdad A et al. The burden of diseases, injuries, and risk factors by state in the USA, 1990–2021: a systematic analysis for the Global Burden of Disease Study 2021. Lancet. 2024; 404(10469): 2314-2340.

• Mokdad A et al. Burden of disease scenarios by state in the USA, 2022–50: a forecasting analysis for the Global Burden of Disease Study 2021. Lancet. 2024; 404(10469): 2341-2370.

• Ng M et al. National-level and state-level prevalence of overweight and obesity among children, adolescents, and adults in the USA, 1990–2021, and forecasts up to 2050. Lancet. 2024; 404(10469): 2278-2298.

• Jang S*, Qin X, Park S, McCoy R, Chen J. Healthcare expenditures among older immigrants in the United States with Alzheimer’s disease and related dementias: Population-based study between 2007 and 2020. Journals of Gerontology Series B: Social Sciences. 2024;1;79(12): gbae166.

• Park S, Kim D*. Association of patient-clinician communication with access to care, health care use, and financial burden of care. American Journal of Preventive Medicine. 2024; 67(5): 740-745.  

• Kim Y, Kim J, Kim H, Park S, Li Y. Trend in respite use by race among caregivers for people living with dementia. Journals of Gerontology Series A: Biological Sciences and Medical Sciences. 2024;7(79): S42-S49.

• Stimpson JP,* Park S, Cano MA, Ortega AN. Cancer fatalism, social media informational awareness, and education. Cancer Causes & Control. 2024; 35(10): 1383-1392.

• Park S*, Berkowitz SA. Financial hardship among Traditional Medicare and Medicare Advantage enrollees with and without food insecurity. Journal of General Internal Medicine. 2024; 39: 2407-2414.

• Park S*, Wadhera RK. Use of high- and low-value health care among US adults by income. Health Affairs. 2024;43(7): 1021-1031.  

• Park S*, Meyers DJ, Trivedi AN. Association of Medicare Advantage enrollment with financial burden of care: a retrospective cohort study. Annals of Internal Medicine. 2024; 177(7): 882-891.

• Stimpson JP*, Park S, Rivera-González AC, Wilson FA, Ortega AN. Prevalence of chronic pain by immigration status and Latino ethnicity. Journal of Racial and Ethnic Health Disparities. 2024.

• Stimpson JP, Park S, Wilson FA, Ortega AN. Variations in unmet health care needs by perceptions of social media health mis- and disinformation, frequency of social media use, medical trust, and medical care discrimination. JMIR Public Health and Surveillance. 2024; 10: e56881.

• Park S*, Stimpson JP. Health care expenses and financial hardship among Medicare beneficiaries with functional disability. JAMA Network Open. 2024; 7(6): e2417300.

• Park S*, Ortega AN, Mortensen K, Chen J, Bustamante AV. Association of food insecurity with health, access to care, affordability of care, financial burden of care, and financial hardships among US adults during the COVID-19 pandemic. Public Health. 2024; 230: 183-189.

• Park S*, Berkowitz SA. Social isolation, loneliness, and health-related quality of life among adults with food insecurity in the United States, 2020-2021. American Journal of Preventive Medicine. 2024; 67(1): 120-123.

• Park S*, Meyers DJ, Jimenez DE, Gualdron N, Cook BL. Health care spending, use, and financial hardship among traditional Medicare and Medicare Advantage enrollees with mental health symptoms. American Journal of Geriatric Psychiatry. 2024; 32(6): 739–750.

• Brauer M, Roth GA, Aravkin, AY et al. Global burden and strength of evidence for 88 risk factors in 204 countries and 811 subnational locations, 1990–2021: a systematic analysis for the Global Burden of Disease Study 2021. Lancet. 2024; 403(10440): 2162–2203.

• Vollset SE, Ababneh HS, Abate YH et al. Burden of disease scenarios for 204 countries and territories, 2022–2050: a forecasting analysis for the Global Burden of Disease Study 2021. Lancet. 2024; 403(10440): 2204–2256.

• Park S*, Nguyen AM. Determinants and effectiveness of annual wellness visits among Medicare beneficiaries in 2020. Family Practice. 2024; 41(2): 203–206.

• Park S*, Stimpson JP. Unmet need for medical care among Medicare beneficiaries by health insurance literacy and disability status. Disability and Health Journal. 2024; 17(2): 101548.

• Park S*, Marcondes FO. The effect of Medicare eligibility on diagnosis of common chronic conditions. American Journal of Managed Care. 2024; 30(2):96–104.

• Ko S, Park S, Kim J, Subramanian SV, Kim R*. Spousal multimorbidity and depressive symptoms among older Indian couples: Do one’s own health status and sex matter? GeroScience. 2024; 46(1): 885-896. 

• Stimpson JP,* Park S, Pruitt SL, Ortega AN, Eysenbach G. Variation in trust in cancer information sources varies by perceptions of health mis- and disinformation on social media and race and Ethnicity. JMIR Cancer. 2024; 10: e54162.

• Park S*, Chen J, Bustamante AV. Adverse consequences of food insecurity among U.S. adults beyond health outcomes. American Journal of Preventive Medicine. 2024; 66(1): 146-153.

• Stimpson JP,* Park S, Pruitt SL. Trusting information on cancer varies by source of information and political viewpoint. Cancer Causes & Control. 2024; 35(1): 177-184.

2023

• Park S*, Bae K. Characteristics and spending patterns of persistently and transiently high-cost older adults in South Korea. Journal of Preventive Medicine and Public Health. 2023; 56(5): 475-480.

• Park S*, Kinsey EW, Wadhera RK. Effects of Medicare eligibility at age 65 years on affordability of care and food insecurity. Journal of the American Geriatrics Society. 2023; 71(12): 3934-3938.

• Park S*, Nguyen AM. Use of high- and low-value care among older adults by education levels. Family Practice. 2023; 40(4): 560-563.

• Park S*, Ortega AN, Chen J, Bustamante AV. Effects of Medicare eligibility and enrollment at age 65 among immigrants and US-born residents. Journal of the American Geriatric Society. 2023; 71(9): 2845-2854.

• Park S*, Bustamante AV, Chen J, Ortega AN. Differences in use of high-value and low-value health care between immigrants and US-born residents. Health Services Research. 2023; 58(5): 1098-1108.

• Park S*, Meyers DJ, Rivera-Hernandez M, Bustamante AV. Medicare Advantage by immigration and English proficiency status. American Journal of Managed Care. 2023; 58(5): 1098-1108.

• Park S*, Park K, Chung W. Variations in healthcare spending, care access, and health status by care need: Evidence from South Korea. Journal of General Internal Medicine. 2023; 38: 2623-2625.

• Park S*, Stimpson JP. Unmet need for medical care among fee-for-service Medicare beneficiaries by level of care need. Journal of General Internal Medicine. 2023; 38(9): 2059-2068.

• Park S*, Werner RM, Coe NB. Racial disparities in access to and enrollment in high-quality Medicare Advantage plans. Health Services Research. 2023; 58(2): 303-31. [John M. Eisenberg Article-of-the-Year Award]

• Park S*, Langellier BA, Meyers D. Differences in integrated and non-integrated Medicare Advantage plans. Health Services Research. 2023;58(3): 560-568.

• Park S*, Chung W, Stimpson JP. Access to care and satisfaction with care among fee-for-service Medicare beneficiaries by level of care need. Disability and Health Journal. 2023;16(2):101402.

• Park S*. Effect of Medicare Advantage enrollment on preventive care use and health behavior. Health Services Research. 2023;58(3): 569-578.

• Park S*, Teno JM, White L, Coe NB. Association of Medicare Advantage star ratings with patterns of end-of-life care. Journal of the American Geriatric Society. 2023;71(1):279-282.

• Park S*, Wadhera RK, Jung J. Effects of Medicare eligibility and enrollment at age 65 years on use of high- and low-value care. Health Services Research. 2023;58(1):174-185.

2022

• Rivera-Hernandez M*, Meyers D, Kim D, Park S, Trivedi AN. Variations in Medicare Advantage switching rates among African American and Hispanic Medicare beneficiaries with Alzheimer’s disease and related dementias, by sex and dual eligibility. The Journals of Gerontology Series B: Psychological Sciences and Social Sciences. 2022;77(12):e279-e287.

• Park S*, Werner RM, Coe NB. Association of Medicare Advantage star ratings and racial and ethnic disparities in hospitalizations for ambulatory care sensitive conditions. Medical Care. 2022;60(12):872-879. 

• White L*, Ingraham B, Larson E, Fishman P, Park S, Coe NB. Observational study of patient characteristics associated with a timely diagnosis of dementia and mild cognitive impairment without dementia. Journal of General Internal Medicine. 2022;37(12):2957-2965.

• Park S*, Meyers D, Rivera-Hernandez, M. Enrollment in supplemental insurance coverage among Medicare beneficiaries by race/ethnicity. Journal of Racial and Ethnic Health Disparities. 2022;9(5):2001-2010.

• Park S*, Coe NB. Insurance coverage and health care spending by state-level Medigap regulations. American Journal of Managed Care. 2022;28(4):172-179.

• Park S*, Langellier BA, Meyers D. Association of health insurance literacy with enrollment in traditional Medicare, Medicare Advantage, and plan characteristics within Medicare Advantage. JAMA Network Open. 2022;5(2):e2146792.

• Park S*, Langellier BA, Meyers D. Adoption of telehealth benefits by Medicare Advantage plans in 2020 and 2021. Journal of General Internal Medicine. 2022;37(3):686-688.

• Park S*, Teno JM, White L, Coe NB. Effects of Medicare Advantage on patterns of end-of-life care among Medicare decedents. Health Services Research. 2022;57(4):863-871.

• Park S*. Effect of Medicare Advantage on health care use and care dissatisfaction in mental illness. Health Services Research. 2022;57(4):820-829.

2021

• Park S*, Stimpson JP. Trends in forgone medical care among Medicare beneficiaries during the COVID-19 pandemic. JAMA Health Forum. 2021;2(12)e214299.

• Park S*, Langellier BA, JF Figueroa, Burke R, Coe NB. Association of Medicare Advantage penetration with per capita spending, emergency department visits, and readmission rates among fee-for-service Medicare beneficiaries with high comorbidity burden. Medical Care Research and Review. 2021;78(6):703-712.

• Kim D, Chen C*, Tysinger B, Park S, Chong MZ, Wang L, Zhao M. Yuan JM, Koh WP, Yoong J, Bhattacharya J, Eggleston K. Smoking, life expectancy, and chronic disease in South Korea, Singapore, and the United States: A microsimulation model. Health Economics. 2021;30(S1):92-104.

• Park S*, Massey PM, Stimpson JP. Primary source of information about COVID-19 as a determinant of perception of COVID-19 severity and vaccine uptake. Journal of General Internal Medicine. 2021;36(10):3088-3095.

• Chu J*, Ortega AN, Park S, Vargas Bustamante A, Roby DH. The Affordable Care Act and health care access and utilization among White, Asian, and Latino immigrants in California. Medical Care. 2021;59(9):762-767.

• Park S*, Basu A. Improving risk adjustment with machine learning: accounting for service-level propensity scores to reduce service-level selection. Health Services and Outcomes Research Methodology. 2021;21(3):363-388.

• Park S*, Chen J, Roby DH, Ortega AN. Differences in health care expenditures among non-Latino Whites and Asian subgroups vary along the distribution of expenditures. Medical Care Research and Review. 2021;78(4):432-440.

• Park S*, Langellier BA. Care for food-insecure enrollees in Medicare Advantage vs traditional Medicare. American Journal of Managed Care. 2021;27(7):1-9.

• Park S*, Chen J, Ma GX, Ortega AN. Inequities in access to care and health care spending for Asian Americans with cancer. Medical Care. 2021;59(6):528-536.

• Park S*, Jung J, Larson EB. Preventable health behaviors, COVID-19 severity perceptions, and vaccine uptake in traditional Medicare and Medicare Advantage: a survey-based study. Journal of General Internal Medicine. 2021;36(6):1837-1840.

• Park S*, Jung J, Burke R, Larson EB. Trends in use of low value care in Medicare Advantage and traditional Medicare. JAMA Network Open. 2021;4(3):e211762.

• Park S*, Fishman P, Coe NB. Racial disparities in avoidable hospitalizations in traditional Medicare and Medicare Advantage. Medical Care. 2021;59(11):989-996.

• Park S*, Meyers D, Langellier BA. Rural enrollees in Medicare Advantage have substantial rates of switching to traditional Medicare. Health Affairs. 2021;40(3):469-477.

• Park S*, Langellier BA, Burke R. Telehealth benefits offered by Medicare Advantage plans in 2020. Medical Care.2021;59(1):53-57.

2020

• Park S*. Chen J. Racial and ethnic patterns and differences in health care expenditures among Medicare beneficiaries with and without cognitive deficits or Alzheimer’s disease and related dementias. BMC Geriatrics. 2020;20(1);482.

• Park S*, Larson EB, Fishman P, White L, Coe NB. Differences in health care utilization, process of diabetes care, care satisfaction, and health status in patients with diabetes in Medicare Advantage versus traditional Medicare.Medical Care. 2020;58(11):1004-1012.

• Fishman P*, White L, Ingraham, B, Park S, Larson E, Crane, P, Coe N. Health care costs of alzheimer's and related dementias within a medicare managed care provider. Medical Care. 2020;58(9):833-841.

• Park S*, Figueroa JF, Fishman P, Coe NB. Primary care utilization and expenditures in traditional Medicare and Medicare Advantage, 2007-2016. Journal of General Internal Medicine. 2020;35(8):2480-2481.

• Langellier BA*, Park S. Financial performance of Medicare Advantage contracts in 2014 and plan renewal, consolidation, and termination rates in the subsequent year. Medical Care. 2020;58(8):674-680.

• Kirby A*, Park S, Cook TB, Odem-Davis K, Gore JL, Wolff E. Practice patterns for women with overactive bladder syndrome: Time between medications and third-line treatments. Female Pelvic Medicine and Reconstructive Survey. 2020;26(7):431-436. 

• Park S*, Roby DH, Stimpson JP, Kemmick Pintor J, Chen J, Ortega AN. Insurance coverage and health care utilization among Asian youth before and after the Affordable Care Act. Academic Pediatrics. 2020;20(5);670-677.

• Park S*. Stimpson JP, Nguyen GT. Association of changes in primary care spending and use with participation in the US Affordable Care Act Health Insurance Marketplaces. JAMA Network Open. 2020;3(6);e207442.

• Stimpson JP*, Park S, Wilson FA. Association of Arkansas's section 1115 Medicaid waiver with health insurance coverage. PLoS One. 2020;15(4):e0231417.

• Park S*, White L, Fishman P, Larson EB, Coe NB. Health care utilization, care satisfaction, and health status for Medicare Advantage and traditional Medicare beneficiaries with and without Alzheimer disease and related dementias. JAMA Network Open. 2020;3(3):e201809.

• Park S*, Fishman P, White L, Larson EB, Coe NB. Disease-specific plan switching between traditional Medicare and Medicare Advantage. The Permanente Journal. 2020;24

2019

• Park S*, Chen J, Ma GX, Ortega AN. Utilization of essential preventive health services among Asians after the implementation of the preventive services provisions of the Affordable Care Act. Preventive Medicine Reports. 2019;16:101008.

• Park S*, Stimpson JP, Kemmick Pintor J, Roby DH, McKenna RM, Chen J, Ortega AN. The effects of the Affordable Care Act on health care access and utilization among Asian American subgroups. Medical Care. 2019;57(11):861-868.

• Stimpson JP*, Kemmick Pintor J, McKenna RM, Park S, Wilson FA. Association of Medicaid expansion with health insurance coverage among persons with a disability. JAMA Network Open. 2019;2(7):e197136.

• Fishman P*, Coe N, White L, Crane P, Park S, Ingraham B, Larson E. Cost of dementia in Medicare managed care: A systematic literature review. American Journal of Managed Care. 2019;25(8):e247-e253.

2018

• Park S*, Basu A. Alternative evaluation metrics for risk adjustment methods. Health Economics. 2018;27(6):984-1010.

• Park S, Momany ET, Jones MP, Kuthy RA, Askelson NM, Wehby GL, Damiano PC, Chi DL*. The effects of medical well baby visits in promoting earlier first dental visits for children. JDR Clinical and Translational Research. 2018;3(1):91-100.

2016

• Park S*, Chan KC, Williams EC. Gain of employment and perceived health status among previously unemployed persons: Evidence from a longitudinal study in the United States. Public Health. 2016;133:83-90.

2013

• Park S, Lee J, Ikai H, Otsubo T, Imanaka Y*. Decentralization and centralization of healthcare resources: Investigating the associations of hospital competition and number of cardiologists per hospital with mortality and resource utilization in Japan. Health Policy. 2013;113:100-109.

• Park S, Sasaki N, Morishima T, Ikai H, Imanaka Y*. The number of cardiologists, case volume, and in-hospital mortality in acute myocardial infarction patients. International Journal of Cardiology. 2013;168(4):4470-4471.

• Sasaki N, Lee J, Park S, Umegaki T, Kunisawa S, Otsubo T, Ikai H, Imanaka Y*. Development and validation of an acute heart failure-specific mortality predictive model based on administrative data. Canadian Journal of Cardiology. 2013;29(9):1055-1061.

• Park S, Lee J, Ikai H, Otsubo T, Ukawa N, Imanaka Y*. Quality of care and in-hospital resource use in acute myocardial infarction: Evidence from Japan. Health Policy. 2013;111(3):264-272.

• Lee J, Morishima T, Park S, Otsubo T, Ikai H, Imanaka Y*. The association between health care spending and quality of care for stroke patients in Japan. Journal of Health Services Research and Policy. 2013;18(2):77-82.