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Eric   Christensen, PhD

Eric Christensen, PhD

Harvey L. Neiman Health Policy Institute

Director of Economic and Health Services Research

Expertise: Health EconomicsEconomicsHealthcarePopulation HealthHealth Service Research

Eric Christensen, Ph.D., is the Director of Economic and Health Services Research for the Harvey L. Neiman Health Policy Institute (HPI). He has over 20 years of experience as a health economist. Prior to working at the Neiman HPI, he led an interdisciplinary research team at the Center for Naval Analyses conducting research for various government agencies, served as the health economist for Children’s Minnesota hospital system, taught health economics at the University of Minnesota, and engaged in private consulting.

Dr. Christensen’s recent research has focused on the financial viability of the No Surprises Act for clinicians when resolving payment disputes for out-of-network claims, Medicare reimbursement trends, economic drivers of health disparities and the role of reimbursement in disparities, the role of treatment and imaging in cost growth in stroke care, and the association of non-physician practitioners in imaging ordering and interpretation patterns. His research and consulting have covered an array of health care delivery and policy questions from the standpoints of cost of imaging, non-physician practitioners and imaging, accountable care organizations, population health, cost-effectiveness, medical homes, interventions, infrastructure, financial performance under various reimbursement models, demonstrating the value of specific clinical approaches, determining the return on investment, and demonstrating the economic impact of health systems on the local economy.

Dr. Christensen has worked extensively with internal and external stakeholders. In addition to professional conferences, he has presented research and analytic findings to senior government leaders and corporate executives. This includes testimony before U.S. Senate and U.S. House committees, the congressionally appointed Veterans’ Disability Benefits Commission, and the DOD Task Force on the Future of Military Health Care.

Dr. Christensen received his PhD in economics from the University of Illinois. He has a master’s degree in economics from Colorado State University and a bachelor’s degree in business management (finance) from Brigham Young University.



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2023

The Neiman Imaging Comorbidity Index Proves Effective for Risk-Adjustment Across Medicare, Medicaid and Privately Insured Populations

Previously in 2024, researchers at the Harvey L. Neiman Health Policy Institute published a novel risk-adjustment score—the Neiman Imaging Comorbidity Index (NICI)—predictive of patients’ advanced imaging use. Now, these researchers have published more extensive validation of the NICI to test its utility in datasets other than the claims dataset from which it was developed.
20-Dec-2024 04:55:00 PM EST

Medicaid Patients in States with Relatively Higher Medicaid Reimbursement Are More Likely to Receive Imaging

A new Harvey L. Neiman Health Policy Institute study found that Medicaid patients residing in states with higher Medicaid reimbursement were more likely to receive medical imaging. However, for those who underwent imaging, the number of imaging exams they received did not vary with reimbursement. This study, published in the Journal of the American College of Radiology, was based on nearly 49 million Medicaid and Children’s Health Insurance Program (CHIP) beneficiaries 0-64 years of age in 2019.
17-Dec-2024 09:40:34 PM EST

New Study Shows Mobile Mammography Reach is Highest in Underserved Groups with Low Breast Cancer Screening Adherence

A recent study by the Harvey L. Neiman Health Policy Institute demonstrates that mobile mammography is generally used by women otherwise unlikely to be screened, and thus is complementary to facility-based mammography rather than a substitute for it. Hence, mobile mammography could feasibly increase breast cancer screening rates, especially in traditionally underserved communities. This study, published in Clinical Breast Cancer, was based on 2.6 million women with Medicare fee-for-service insurance during the 2004-2021 period.
13-Dec-2024 06:20:40 PM EST

NPP Imaging Interpretation Share More Than Doubled between 2013 and 2022

A new Harvey L. Neiman Health Policy Institute study found non-physician practitioners’ (NPPs) share of imaging interpretation in office-based practices increased 117%, from 2.52% of Medicare imaging studies in 2013 to 5.47% in 2022. Interpretations by NPPs are performed by a small minority (5.55%) of NPPs with considerable variation by imaging modality and state.
19-Nov-2024 10:35:00 AM EST

Radiologists are Participating in Less Resident Training as Workloads Increase, New Study Shows

According to new research from the Harvey L. Neiman Health Policy Institute, radiologists who teach residents are spending significantly less time each year in that teaching role. The study, published today in the Journal of The American College of Radiology, tracked the workload of 35,595 radiologists in Medicare Part B claims data from 2008 to 2020. As a percentage of total clinical workload measured in relative value units, work that involved resident training dropped from 35.3% in 2008 to 26.3% in 2019. In 2020, when the COVID-19 pandemic hit the U.S., the teaching share of work dropped further to 24.5%.
21-Oct-2024 11:15:33 AM EDT

Neurointerventionalists May Rarely Recover Payment for Out of Network Mechanical Thrombectomy Under the No Suprises Act

A new Harvey L. Neiman Health Policy Institute study found that neurointerventionalists, who often deliver lifesaving and disability-sparing treatments for emergency stroke cases, have essentially no financially viable access to payment recovery through the No Surprises Act (NSA) for professional mechanical thrombectomy (MT) out-of-network (OON) claims.
02-Oct-2024 05:05:32 PM EDT

Women Travel Nearly 3 Times as Far for Supplemental MR or US Breast Cancer Screening than for Mammography, Limiting Access for Those at Higher Risk

A new Harvey L. Neiman Health Policy Institute study found the geographic distance to facilities providing breast MR or ultrasound was more than 2.7 times further than the distance to a mammography center. Given new breast density guidelines, now approximately one in two women (those who have dense breast tissue) are recommended to have supplemental breast cancer screening by breast MR or ultrasound due to their relatively higher breast cancer risk. The research, published in the American Journal of Preventive Medicine, measured distance to the nearest facility offering mammography, breast MR and/or breast ultrasound for 29,629 ZIP codes. The researchers compared distance between imaging types to reveal the relative extent of this barrier to access and to inform approaches to mitigate disparities.
08-Aug-2024 02:00:30 PM EDT

Imaging Market Share Analysis Shows 28% of Image Interpretation Performed by Non-Radiologists

A new Harvey L. Neiman Health Policy Institute study found that radiologists interpreted 72.1% of all imaging studies for Medicare fee-for-service beneficiaries in 2022, with the remaining 27.9% performed by other types of clinicians.
27-Jun-2024 12:45:42 PM EDT

Consolidation Patterns of Practices with Radiologists through 2023

A new Harvey L. Neiman Health Policy Institute study found that from 2014 to 2023 the number of medical practices with affiliated radiologists decreased 14.7% even though the number of radiologists increased 17.3%. As such, the average number of radiologists per practice increased from 9.7 to 17.9 over the study.
04-Jun-2024 12:30:05 PM EDT

Continued Medicare Reimbursement Declines Could Threaten Access to Physicians

A new Harvey L. Neiman Health Policy Institute study found that physician reimbursement per Medicare patient decreased 2.3% between 2005 and 2021 when accounting for inflation, despite a concurrent increase of 45.5% in physician services to each patient. These reimbursement trends varied widely by physician specialty (-57.6% for cardiac surgery to +189.1% for pain management).
26-Apr-2024 09:50:48 AM EDT

Radiologists at Major Disadvantage in MIPS when Working in Radiology-Focused Practices, According to New Study

The latest Harvey L. Neiman Health Policy Institute (HPI) study shows that radiologists in radiology-only practices score significantly lower in the Centers for Medicare & Medicaid Services (CMS) Merit-based Incentive Payment System (MIPS) in 2021.
02-Apr-2024 10:00:14 AM EDT

Only 1% of Radiologist Claims were Out of Network in 2021

A new Harvey L. Neiman Health Policy Institute study found that, by 2021, only 1.1% of radiologists’ commercial claims were out of network (OON), down from 12.6% in 2007. As such, by 2021, radiologists practiced almost exclusively in-network. This Journal of the American College of Radiology study was based on 80 million commercial radiology claims (2007-2021) for individuals covered by a large commercial payer.
19-Jan-2024 10:05:11 AM EST

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