Cost Analysis of Dialysis Access Maintenance Interventions across Physician Specialties in U.S. Medicare Beneficiaries.

Background Dialysis maintenance interventions account for billions of dollars in U.S. Medicare spending and are performed by multiple medical specialties. Whether Medicare costs differ by physician specialty is, to the knowledge of the authors, not known. Purpose To assess patency-adjusted costs of endovascular dialysis access maintenance by physician specialty. Materials and Methods In this retrospective longitudinal cohort study, patients who were beneficiaries of Medicare undergoing their first arteriovenous access placement in 2009 were identified by using billing codes in the 5% Limited Data Set. By tracking their utilization data through 2014, postintervention primary patency and aggregate payments associated with maintenance interventions were calculated. Unadjusted payments per year of access patency gain were compared across physician specialty. A general linear mixed-effects model adjusted for covariates was used, as follows: patient characteristics, access type (fistula vs graft), clinical severity, type of intervention (angioplasty, stent, thrombolysis), clinical location (hospital outpatient vs office-based laboratory), and resource utilization (operating room use, anesthesia use). Results First arteriovenous access was performed in 1479 beneficiaries (mean age, 63 years ± 15 [standard deviation]; 820 men) in 2009. Through 2014, 8166 maintenance interventions were performed in this cohort. Unadjusted mean Medicare payments for each incremental year of patency were as follows: $71 000 for radiologists, $89 000 for nephrologists, and $174 000 for surgeons. Billing for operating room (41.8% [792 of 1895], surgery; 10.2% [277 of 2709], nephrology; and 31.1% [1108 of 3562], radiology) and anesthesia (19.9% [377 of 1895], surgery; 2.6% [70 of 2709], nephrology; 4.7% [170 of 3562], radiology) varied by specialty and accounted for 407% and 132% higher payments, respectively. After adjusting for clinical severity and location, type of intervention, and resource utilization, nephrologists and surgeons had 59% (95% confidence interval: 44%, 73%; P < .001) and 57% (95% confidence interval: 43%, 72%; P < .001) higher payments, respectively, for the same patency gain compared with radiologists. Operating room use and anesthesia services were major drivers of higher cost, with 407% (95% confidence interval: 374%, 443%; P < .001) and 132% (95% confidence interval: 116%, 150%; P < .001) higher costs, respectively. Conclusion Patency-adjusted payments for hemodialysis access maintenance differed by physician specialty, driven partly by discrepant rates of billing for operating room and anesthesia use. © RSNA, 2020 Online supplemental material is available for this article. See also the editorial by White in this issue.

Physician Knowledge of Radiation Exposure and Risk in Medical Imaging.

PURPOSE: Medical imaging is an increasingly important source of radiation exposure for the general population, and there are risks associated with such exposure; however, recent studies have demonstrated poor understanding of medical radiation among various groups of health care providers. This study had two aims: (1) analyze physicians' knowledge of radiation exposure and risk in diagnostic imaging across multiple specialties and levels of training, and (2) assess the effectiveness of a brief educational presentation on improving physicians' knowledge. METHODS: From 2014 to 2016, 232 health care providers from multiple departments participated in an educational presentation and pre- and postpresentation tests evaluating knowledge of radiation exposure and risk at a large academic institution. RESULTS: Knowledge of radiation exposure and risk was relatively low on the prepresentation test, including particularly poor understanding of different imaging modalities, with 26% of participants unable to correctly identify which modalities expose patients to ionizing radiation. Test scores significantly increased after the educational presentation. Radiologists had higher prepresentation test scores than other specialties, and therefore less opportunity for improvement, but also demonstrated improvement in radiation safety knowledge after education. Aside from radiology, there was no significant difference in initial knowledge of radiation exposure and risk among the other specialties. CONCLUSIONS: Providers' knowledge of radiation exposure and risk was low at baseline but significantly increased after a brief educational presentation. Efforts to educate ordering providers about radiation exposure and risk are needed to ensure that providers are appropriately weighing the risks and benefits of medical imaging and to ensure high-quality, patient-centered care.

ABR examinations: the why, what, and how.

The American Board of Radiology (ABR) has provided certification for diagnostic radiologists and other specialists and subspecialists for more than 75 years. The Board certification process is a tangible expression of the social contract between the profession and the public by which the profession enjoys the privilege of self-regulation and the public is assured that it can expect medical professionals to put patients' interests first, guarantees the competence of practitioners, and guards the public health. A primary tool used by the ABR in fulfilling this responsibility is the secure proctored examination. This article sets forth seven standards based on authoritative sources in the field of psychometrics (the science of mental measurements), and explains in each case how the ABR implements that standard. Readers are encouraged to understand that, despite the multiple opinions that may be held, these standards developed over decades by experts using the scientific method should be the central feature in any discussion or critique of examinations given for the privilege of professional practice and for safeguarding the public well-being.

ABR examinations: the why, what, and how.

The American Board of Radiology (ABR) has provided certification for diagnostic radiologists and other specialists and subspecialists for more than 75 years. The Board certification process is a tangible expression of the social contract between the profession and the public by which the profession enjoys the privilege of self-regulation and the public is assured that it can expect medical professionals to put patients' interests first, guarantees the competence of practitioners, and guards the public health. A primary tool used by the ABR in fulfilling this responsibility is the secure proctored examination. This article sets forth seven standards based on authoritative sources in the field of psychometrics (the science of mental measurements), and explains in each case how the ABR implements that standard. Readers are encouraged to understand that, despite the multiple opinions that may be held, these standards developed over decades by experts using the scientific method should be the central feature in any discussion or critique of examinations given for the privilege of professional practice and for safeguarding the public well-being.

An evaluation of the impact of clinically embedded reading rooms on radiologist-referring clinician communication.

The aim of this study was to investigate whether locating reading rooms in clinical areas at a large tertiary care, academic hospital in the United States corresponds with increased rates of direct communication between radiologists and clinicians. Data recorded included the frequency, form, duration, and general purpose of communications. Two-tailed Fisher's exact tests were used to determine the statistical significance of differences between the frequencies of communication methods for the reading rooms included in the study. During the observation period, there were a total of 175 episodes of communication between radiologists and referring providers in the 4 study reading rooms. There was a highly significant difference (P < .0001) in the percentage of visits and critical test result management messages sent between embedded and nonembedded reading rooms, while the differences in the proportion of calls both to and from referring providers was not significant (P = .4468). Although the purpose of this study was to assess the impact of reading room location on radiologists' communications with referring providers, several alternative hypotheses could also explain the results. The value of this study emerges from the documentation of the high degree of variability among institutions in communication practices among different kinds of radiologists and referring physicians. The extent of these different practices among the 4 reading rooms has important implications for future studies of communication patterns between radiologists and referring providers as well as for designing effective interventions to enhance the role of radiologists as consultants.

ACR guidance document on MR safe practices: 2013.

Because there are many potential risks in the MR environment and reports of adverse incidents involving patients, equipment and personnel, the need for a guidance document on MR safe practices emerged. Initially published in 2002, the ACR MR Safe Practices Guidelines established de facto industry standards for safe and responsible practices in clinical and research MR environments. As the MR industry changes the document is reviewed, modified and updated. The most recent version will reflect these changes.

Introduction to value-based payment modifiers.

Value-based payment modifiers were legislated by Congress in the 2010 Patient Protection and Affordable Care Act. It is clear in the legislation, and the corresponding proposals published by the secretary of the US Department of Health and Human Services in late 2011, that the intent is to move from paying physicians for reporting to paying physicians for performance. The proposals, developed jointly with CMS, specify that the calculation of payments for performance will be a composite of quality and cost measures. The base year for determining performance benchmarks for the performance measures will be 2013, and the measures will be applied to physician payments on a limited basis beginning in 2015 and to all physician payments by 2017. The role of medical specialty boards, such as the ABR, in the development and deployment of measures is highlighted in this context. CMS's recent conversations with board representatives have indicated their view that the boards' measure development activities are key to increasing physician (especially specialist) participation in the Physician Quality Reporting System to 50% by 2015, from 20% to 30% today. The ABR will continue its past activities in this arena, working with the American Board of Medical Specialties, CMS, and specialty societies, so that ABR diplomates will be able to simultaneously complete their Maintenance of Certification requirements, satisfy the requirements for CMS incentives, and avoid penalties.

Addressing overutilization in medical imaging.

The growth in medical imaging over the past 2 decades has yielded unarguable benefits to patients in terms of longer lives of higher quality. This growth reflects new technologies and applications, including high-tech services such as multisection computed tomography (CT), magnetic resonance (MR) imaging, and positron emission tomography (PET). Some part of the growth, however, can be attributed to the overutilization of imaging services. This report examines the causes of the overutilization of imaging and identifies ways of addressing the causes so that overutilization can be reduced. In August 2009, the American Board of Radiology Foundation hosted a 2-day summit to discuss the causes and effects of the overutilization of imaging. More than 60 organizations were represented at the meeting, including health care accreditation and certification entities, foundations, government agencies, hospital and health systems, insurers, medical societies, health care quality consortia, and standards and regulatory agencies. Key forces influencing overutilization were identified. These include the payment mechanisms and financial incentives in the U.S. health care system; the practice behavior of referring physicians; self-referral, including referral for additional radiologic examinations; defensive medicine; missed educational opportunities when inappropriate procedures are requested; patient expectations; and duplicate imaging studies. Summit participants suggested several areas for improvement to reduce overutilization, including a national collaborative effort to develop evidence-based appropriateness criteria for imaging; greater use of practice guidelines in requesting and conducting imaging studies; decision support at point of care; education of referring physicians, patients, and the public; accreditation of imaging facilities; management of self-referral and defensive medicine; and payment reform.

A quantitative approach to sequence and image weighting.

Weighting is the term most frequently used to describe magnetic resonance pulse sequences and the concept most commonly used to relate image contrast to differences in magnetic resonance tissue properties. It is generally used in a qualitative sense with the single tissue property thought to be most responsible for the contrast used to describe the weighting of the image as a whole. This article describes a quantitative approach for understanding the weighting of sequences and images, using filters and partial derivatives of signal with respect to logarithms of tissue property values. Univariate and multivariate models are described for several pulse sequences including methods for maximizing weighting and calculating both sequence and image weighting ratios. The approach provides insights into difficulties associated with qualitative use of the concept of weighting and a quantitative basis for assessing the signal, contrast, and weighting of commonly used sequences and images.

RADPEER scoring white paper.

The ACR's RADPEER program began in 2002; the electronic version, e-RADPEER, was offered in 2005. To date, more than 10,000 radiologists and more than 800 groups are participating in the program. Since the inception of RADPEER, there have been continuing discussions regarding a number of issues, including the scoring system, the subspecialty-specific subcategorization of data collected for each imaging modality, and the validation of interfacility scoring consistency. This white paper reviews the task force discussions, the literature review, and the new recommended scoring process and lexicon for RADPEER.

2007 ACR presidential oration: four foundations for our future.

In this 2007 Presidential Address, James P. Borgstede, MD, makes 4 requests of radiologists. These requests are first, that they be adaptive to change. Second, that they uphold quality medical imaging as a part of a specialty rather than a commodity. Third, that they develop a pay-it-forward sense of responsibility. And fourth, that they embrace the perspective of patient primacy. He opines that the future of radiology lies in an evolution to a specialty with greater emphasis on functional imaging and with physiologic orientation. He states that radiology and the ACR cannot be the organization seeking legislative protection for exclusivity of imaging services based on specialty title, but instead must be the specialty seeking public protection based on radiologists' ability to provide services with quality. He further states that radiology is commoditized through the inappropriate use of imaging requests as orders for tests rather than requests for consultations and by inappropriate use of digital imaging and electronic transfer of data. In addition, if radiologists keep patient primacy first in all of their considerations, they will ultimately do what is best for radiology as a specialty as well.