Anju Murayama1,*Affiliations:1 School of Medicine, Tohoku University, Sendai City, Miyagi, Japan*Correspondence:Anju MurayamaTohoku University School of Medicine, 2-1 Seiryo machi, Aoba Ward, Sendai, Miyagi 980-0872, JapanTelephone: +81-22-717-8006Email address:ange21tere@gmail.comTwitter summaryUsing the 2014-2022 Open Payments Database, this study found 50.5% to 68.0% of endocrinologists in the US received general payments from the healthcare industry each year.AbstractObjective: This study aimed to evaluate industry payments to endocrinologists and their institutions between 2014 and 2022.Research Design and Methods: This serial cross-sectional study examined general and research payments (direct to individuals or associated research payments to institutions) made to endocrinologists registered in the National Plan and Provider Enumeration System in the United States, using the Open Payments Database between 2014 and 2022. Payment data were analyzed descriptively. Trends were evaluated by generalized estimating equations.Results: Among 8002 active endocrinologists, 50.5% to 68.0% annually received general payments excluding those for ownership interests and royalties (GPEOR) between 2014 and 2022. The annual median GPEOR per physician declined from $984 in 2014 to $438 in 2022. Only top 10% of endocrinologists annually received 90.0% to 94.4% of all GPEOR. Despite 68.5% of all payments being for research, only 1.6% to 3.0% of endocrinologists directly received these annually, while 6.0% to 9.3% did through their institutions. Per-physician GPEOR decreased between 2014 and 2019, with a relative annual change of -4.4% (95% confidence interval [CI]: -5.7% to -3.3%). The number of endocrinologists receiving research payments decreased by 3.5% (95% CI: -4.8% to -2.2%) between 2014 and 2019. Both GPEOR and research payments were significantly lower in 2020-2022 compared to 2014-2019 in the number of endocrinologists receiving payments and/or payment amounts.Conclusions: Majority of endocrinologists accepted general payments from the healthcare industry, while less than 10% of endocrinologists received research payments (personally or to their institution) in the United States.Highlights• This study examined industry payments to endocrinologists and their institutions using the Open Payments Database from 2014 to 2022.• Findings showed that 50.5%-68.0% of endocrinologists accepted non-research payments each year between 2014 and 2022, while less than 10% of endocrinologists received research payments annually.• Median per-physician annual payments varied, with $438-$984 in general, $1710-$4956 in direct research, and $40,300-$73,161 in associated research.• There was a decreasing trend in per-physician general payments between 2014 and 2019, with a relative annual change of -4.4% (95% confidence interval: -5.7% to -3.3%, p<0.001).IntroductionFinancial collaborations between physicians and the healthcare industry can improve patient care through developing and implementing novel medications and medical devices and fostering research to combat diseases (1). However, these relationships might also negatively impact patient care, as evidenced by various medical scandals involving clinical trials and guideline recommendations (2,3). Increasing public demand for greater transparency in physician-industry relationships led the United States (US) to enact the 2010 Physician Payment Sunshine Act (4), mandating that pharmaceutical and medical device companies report all financial transfers made to physicians and teaching hospitals since 2013. The reported data is publicly disclosed under a federal transparency database, the Open Payments Database.Endocrinology attracts substantial attention from pharmaceutical and medical device manufacturers due to the large and growing population of persons with obesity and diabetes (5,6), the development of novel medications for diabetes and endocrinological diseases, and expansion of indications for certain of these medications over the last decade (7).Conflicts of interest are common among the Endocrine Society guideline authors (8). Irwig et al. reported that 74.3% of the Society’s clinical-practice guideline authors received about $5.5 and $30.9 million in general and research payments, respectively, from pharmaceutical companies. Liu et al. reported that in 2014 the editors of Diabetes Care, an official journal of the American Diabetes Association, received the highest median personal payments from healthcare industries ($19,618) of 52 US medical journals (9). While editors must declare any financial conflicts of interest, to the American Diabetes Association and their academic institutions, that information may not be readily available to the public. Studies have identified positive associations between payment amounts from pharmaceutical companies marketing diabetes medications and increases in physicians’ prescriptions in the US and other developed countries (10-12).Prior studies have not investigated the overall picture of financial relationships between the healthcare industry and endocrinologists since the establishment of the Open Payments Database in the US. This study aimed to shed light on the magnitude, prevalence, and trends in physician-industry financial relationships in endocrinology in the US.Research Design and Methods