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S. Nikpay · SciRah

Researcher profile · Semantic Scholar

S. Nikpay

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S. Nikpay — researcher profile on SciRah

h-index: 21
Works: 96
Citations: 1,394

Most-cited papers

Effect of the Affordable Care Act Medicaid Expansion on Emergency Department Visits: Evidence From State‐Level Emergency Department Databases
S. Nikpay, Seth Freedman, Helen Levy, T. Buchmueller
2017Annals of Emergency Medicine139 citations
Semantic Scholar
Trends in Ransomware Attacks on US Hospitals, Clinics, and Other Health Care Delivery Organizations, 2016-2021
Hannah T. Neprash, Claire C McGlave, D. Cross, B. Virnig +4 more
2022JAMA Health Forum136 citations Open access
Semantic Scholar
Hospital-Physician Consolidation Accelerated In The Past Decade In Cardiology, Oncology.
S. Nikpay, M. Richards, D. Penson
2018Health Affairs101 citations
Semantic Scholar
DIFFERENCE-IN-DIFFERENCES WITH VARIATION IN TREATMENT TIMING
A. Goodman-Bacon, Michael L. Anderson, Martha J. Bailey, Marianne P. Bitler +17 more
201887 citations
Semantic Scholar
The Business of Medicine in the Era of COVID-19.
David M. Cutler, S. Nikpay, Robert S. Huckman
2020Journal of the American Medical Association (JAMA)67 citations
Semantic Scholar
Affordable Care Act Medicaid Expansion Reduced Uninsured Hospital Stays In 2014.
S. Nikpay, T. Buchmueller, Helen Levy
2016Health Affairs64 citations
Semantic Scholar
Early Medicaid Expansion in Connecticut Stemmed the Growth in Hospital Uncompensated Care
S. Nikpay, T. Buchmueller, Helen Levy
2015Health Affairs56 citations Open access
Semantic Scholar
Changes in inpatient payer-mix and hospitalizations following Medicaid expansion: Evidence from all-capture hospital discharge data
Seth Freedman, S. Nikpay, A. Carroll, K. Simon
2017PLoS ONE41 citations Open access
Semantic Scholar
National Lung Cancer Screening Utilization Trends in the Veterans Health Administration.
Jennifer A. Lewis, Lauren R. Samuels, J. Denton, G. Edwards +11 more
2020JNCI Cancer Spectrum36 citations Open access
Semantic Scholar
Breadth and Exclusivity of Hospital and Physician Networks in US Insurance Markets
J. Graves, Léonce Nshuti, Jordan Everson, M. Richards +4 more
2020JAMA Network Open33 citations Open access
Semantic Scholar
HETEROGENEOUS EFFECTS OF THE ACA MEDICAID EXPANSION ON HOSPITAL FINANCIAL OUTCOMES
Jordan H. Rhodes, T. Buchmueller, Helen Levy, S. Nikpay
2019Contemporary economic policy31 citations Open access
Semantic Scholar
Hospital Charity Care--Effects of New Community-Benefit Requirements.
S. Nikpay, John Z. Ayanian
2015New England Journal of Medicine31 citations
Semantic Scholar
COVID-19 Has Increased Medicaid Enrollment, But Short-Term Enrollment Changes Are Unrelated To Job Losses.
Christopher Frenier, S. Nikpay, Ezra Golberstein
2020Health Affairs30 citations
Semantic Scholar
Health Reform and Retirement
Helen Levy, T. Buchmueller, S. Nikpay
2016The journals of gerontology. Series B, Psychological sciences and social sciences30 citations Open access
Semantic Scholar
Relationship between initiation of 340B participation and hospital safety-net engagement.
S. Nikpay, M. Buntin, R. Conti
2020Health Services Research29 citations Open access
Semantic Scholar
Patient Protection and Affordable Care Act Medicaid expansion and gains in health insurance coverage and access among cancer survivors
S. Nikpay, Margaret G. Tebbs, Emily H. Castellanos
2018Cancer29 citations Open access
Semantic Scholar
Revenues and Profits From Medicare Patients in Hospitals Participating in the 340B Drug Discount Program, 2013-2016
R. Conti, S. Nikpay, M. Buntin
2019JAMA Network Open28 citations Open access
Semantic Scholar
Evaluating Community-Based Health Improvement Programs
Carrie E. Fry, S. Nikpay, Erika T. A. Leslie, M. Buntin
2018Health Affairs28 citations Open access
Semantic Scholar
The Growing Integration of Physician Practices: With a Medicaid Side Effect
M. Richards, S. Nikpay, J. Graves
2016Medical Care27 citations
Semantic Scholar
Diversity of Participants in the 340B Drug Pricing Program for US Hospitals
S. Nikpay, M. Buntin, R. Conti
2018JAMA Internal Medicine25 citations Open access
Semantic Scholar
The Changing Dynamics Of US Health Insurance And Implications For The Future Of The Affordable Care Act.
J. Graves, S. Nikpay
2017Health Affairs22 citations
Semantic Scholar
Per Capita Caps in Medicaid - Lessons from the Past.
A. Goodman-Bacon, S. Nikpay
2017New England Journal of Medicine18 citations
Semantic Scholar
The medicaid windfall: Medicaid expansions and the target efficiency of hospital safety-net subsidies
S. Nikpay
2022Journal of Public Economics15 citations Open access
Semantic Scholar
Taking the Pulse of Hospitals’ Response to the New Price Transparency Rule
S. Nikpay, Ezra Golberstein, Hannah T. Neprash, C. Carroll +1 more
2021Medical Care Research and Review15 citations
Semantic Scholar
Association of hospital closures with changes in Medicare‐covered ambulance trips among rural emergency medical services agencies
S. Nikpay, Craig Tschautscher, N. Scott, M. Puskarich
2021Academic Emergency Medicine15 citations
Semantic Scholar
Association of race and income with incident diagnosis of Alzheimer’s disease and related dementias among Black and White older adults
Laura M. Keohane, S. Nikpay, Kyle Braun, Audrey K. Cheng +5 more
2022Journal of Applied Gerontology14 citations Open access
Semantic Scholar
Interfacility Transfer of Uninsured vs Insured Patients With ST-Segment Elevation Myocardial Infarction in California
M. Ward, S. Nikpay, A. Shermeyer, B. Nallamothu +3 more
2023JAMA Network Open13 citations Open access
Semantic Scholar
Hacked to Pieces? The Effects of Ransomware Attacks on Hospitals and Patients
Claire C McGlave, Hannah T. Neprash, S. Nikpay
2023Social Science Research Network13 citations Open access
Semantic Scholar
The Effect of Health Reform on Retirement
Helen Levy, Helen Levy, Thomas C. Buchmueller, Thomas C. Buchmueller +2 more
201513 citations
Semantic Scholar
Proposing An Innovative Bond To Increase Investments In Social Drivers Of Health Interventions In Medicaid Managed Care.
P. Karaca-Mandic, S. Nikpay, S. Gibbons, David Haynes +2 more
2023Health Affairs12 citations
Semantic Scholar
Burn related injuries: a nationwide analysis of adult inter-facility transfers over a six-year period in the United States
C. S. Evans, K. Hart, W. Self, S. Nikpay +2 more
2022BMC Emergency Medicine12 citations Open access
Semantic Scholar
The Impact of Medicaid Expansion on Household Consumption
Helen Levy, T. Buchmueller, S. Nikpay
2018Eastern Economic Journal12 citations
Semantic Scholar
The Relationship Between Uncompensated Care and Hospital Financial Position: Implications of the ACA Medicaid Expansion for Hospital Operating Margins
S. Nikpay
201612 citations
Semantic Scholar
Ten health policy challenges for the next 10 years
K. Phillips, D. Marshall, Loren Adler, J. Figueroa +5 more
2023Health affairs scholar11 citations Open access
Semantic Scholar
Association between physician practice Medicaid acceptance and employing nurse practitioners and physician assistants: A longitudinal analysis
H. Barnes, M. Richards, G. Martsolf, S. Nikpay +1 more
2020Health Care Management Review11 citations Open access
Semantic Scholar
Association Between New 340B Program Participation and Commercial Insurance Spending on Outpatient Biologic Oncology Drugs
Jessica Chang, P. Karaca-Mandic, S. Nikpay, M. Jeffery
2023JAMA Health Forum10 citations Open access
Semantic Scholar
Switching between medicare advantage and traditional medicare for individuals newly diagnosed with cancer 2015-2019.
Helen M. Parsons, Samuel J. Greenwald, Stephanie L. Jarosek, S. Nikpay +4 more
2025Journal of the National Cancer Institute9 citations Open access
Semantic Scholar
340B Participation and Safety Net Engagement Among Federally Qualified Health Centers
Elizabeth Watts, Claire C McGlave, N. Quinones, John P Bruno +1 more
2024JAMA Health Forum9 citations Open access
Semantic Scholar
Does Vertical Integration Improve Access to Surgical Care for Medicaid Beneficiaries?
D. Haddad, M. Resnick, S. Nikpay
2019Journal of the American College of Surgeons9 citations Open access
Semantic Scholar
Return on investments in social determinants of health interventions: what is the evidence?
S. Nikpay, Zhan-Ji Zhang, Pinar Karaca-Mandic
2024Health affairs scholar8 citations Open access
Semantic Scholar
Association of 340B contract pharmacy growth with county-level characteristics.
S. Nikpay, Gabriela Gracia, Hannah Geressu, R. Conti
2022American Journal of Managed Care8 citations
Semantic Scholar
Cervical Cancer Screening and Follow-Up Procedures in Women Age <21 Years Following New Screening Guidelines.
A. Foxx, Yuwei Zhu, E. Mitchel, S. Nikpay +2 more
2017Journal of Adolescent Health8 citations Open access
Semantic Scholar
Trends in 340B Drug Pricing Program Contract Growth Among Retail Pharmacies From 2009 to 2022
S. Nikpay, Claire C McGlave, J. P. Bruno, Haishan Yang +1 more
2023JAMA Health Forum7 citations Open access
Semantic Scholar
Playing by the Rules? Tracking U.S. Hospitals' Responses to Federal Price Transparency Regulation
S. Nikpay, Caitlin Carroll, Ezra Golberstein, J. M. Abraham
2024Journal of healthcare management / American College of Healthcare Executives6 citations
Semantic Scholar
340B Contract pharmacy growth by pharmacy ownership: 2009–2022
Claire McGlave, John P Bruno, Elizabeth Watts, S. Nikpay
2023Health affairs scholar6 citations Open access
Semantic Scholar
The Association of Health Care System Resources With Lung Cancer Screening Implementation
Jennifer A. Lewis, Lauren R. Samuels, J. Denton, Michael E. Matheny +10 more
2022Chest6 citations Open access
Semantic Scholar
Health Reform and Health Insurance Coverage of Early Retirees
Helen Levy, Tom Buchmueller, S. Nikpay
20166 citations Open access
Semantic Scholar
How Will Patients With Cancer Fare During COVID-19?: Many Unanswered Questions.
B. Virnig, S. Nikpay
2020JAMA Oncology5 citations
Semantic Scholar
ENTREPRENEURSHIP AND JOB LOCK: THE INTERACTION BETWEEN TAX SUBSIDIES AND HEALTH INSURANCE REGULATIONS
S. Nikpay
2014Contemporary economic policy5 citations
Semantic Scholar
Hacked to Pieces? The Effects of Ransomware Attacks on Hospitals and Patients
Hannah T. Neprash, Claire C McGlave, S. Nikpay
2026American Economic Journal: Economic Policy4 citations
Semantic Scholar

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Helen Levy×6
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M. Buntin×6
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Claire C McGlave×5
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Hannah T. Neprash

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