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Biomedical subjects

Jonathan H Sunshine

Publications and source records attributed to Jonathan H Sunshine.

At least 37 records · Page 2Linked to original sources

Unpaid radiology claims in New Jersey: incidence and financial implications.

OBJECTIVE: Nonpayment of claims by insurers may lead to major financial losses by physicians. These losses may far exceed the losses from late payment that we studied previously, although it is late payment that has been the primary focus of legislation enacted in 47 states. This article quantifies the loss to radiologists from nonpayment of claims submitted to payers on behalf of patients with insurance. MATERIALS AND METHODS: We analyzed all claims (48,217) submitted in February, June, and October 2000 to six major payers by a common third-party billing company on behalf of 11 radiology practices in New Jersey. Claims were categorized as unpaid (unpaid > 170 days after submission), paid timely (within 40 days of submission, the criterion of the New Jersey Prompt-Pay Act, effective December 28, 1999), or paid late (40-170 days after submission). A detailed analysis of 5,638 claims from the practice of two of the authors was used to estimate a "clean claims" (claims without defect or need for substantiation) submission rate. RESULTS: The revenue loss from unpaid claims was approximately $156,000, which was 28 times the loss of interest that should, according to law, have been paid on the delayed paid claims. Of the unpaid claims, the payers never disputed 68%, involving approximately $106,000. CONCLUSION: The financial consequences of unpaid claims far exceed those associated with late payment, even omitting all unpaid claims that were disputed by payers. Legislation coupled with active enforcement should address this large problem of unpaid claims, which is many times larger than the already legislatively targeted problem of late payment.

Health Maintenance Organizations↗

Types of procedures performed by diagnostic radiology practices: past patterns and future directions.

OBJECTIVE: The purpose of our study was to determine the types of imaging procedures performed by diagnostic radiology practices and the patterns and differences related to practice characteristics. MATERIALS AND METHODS: The American College of Radiology (ACR) surveyed 970 practices by mail, using a 65-item questionnaire, in 1999. A response rate of 66% was achieved. Weighting was used to make responses representative of all radiology practices in the United States. Trends were explored by making comparisons with data from a 1991-1992 ACR study. RESULTS: Among the types of procedures studied, the highest percentage of multiradiologist diagnostic-radiology-only practices performed mammography (95%) and sonography (94%). (General conventional radiography and fluoroscopy were not studied.) The lowest percentage of these practices performed interventional procedures (69%) and MRI (77%). Solo practices showed less diversity in types of procedures performed than did multiradiologist practices and were a good deal less likely to perform each type of procedure except mammography and sonography. Generally, higher percentages of practices in nonmetropolitan cities or towns and rural practices performed various types of procedures than practices in metropolitan areas. Practice size, types of settings served (hospital or nonhospital), and practice type also influenced the number of types of procedures performed by a practice. The fraction of practices performing CT decreased from 91% to 83% between 1991-1992 and 1999. Percentages for other types of procedures were generally stable over time. CONCLUSION: Certain practice characteristics play a role in determining the types of imaging procedures a diagnostic radiology practice performs. The decline in the percentage of practices providing CT and the failure during the 1990s of percentages for MRI and interventional radiology to increase from a relatively low base is worrisome. Future analyses based on a subsequent ACR survey will provide further insights into trends.

Data Collection↗

Nationwide trends in rates of utilization of noninvasive diagnostic imaging among the Medicare population between 1993 and 1999.

PURPOSE: To determine current utilization rates and recent nationwide trends for noninvasive diagnostic imaging (NDI) among the Medicare population. MATERIALS AND METHODS: Medicare Part B claims data files from 1993, 1996, and 1999 were analyzed for all procedure codes related to NDI. NDI codes were grouped into 22 imaging categories, as well as seven imaging modality groups. The data were analyzed to determine the overall nationwide utilization and relative value unit (RVU) volume and rates and changes in utilization rates and RVU rates between 1993 and 1999 for the Medicare fee-for-service population, which included approximately 33 million enrollees per year. RESULTS: The overall utilization rate for all NDI in 1999 was 324,974 examinations per 100,000 enrollees. Conventional radiography was the most utilized imaging technology (55.5%), followed by ultrasonography (US) (20.5%), computed tomography (CT) (8.8%), mammography (6.0%), nuclear imaging (5.2%), magnetic resonance (MR) imaging (2.6%), and bone densitometry (1.5%) (percentages do not add up to 100% due to rounding). In the 6-year interval from 1993 to 1999, the rate of NDI utilization increased 3.8%. The utilization rate for conventional radiography decreased 13.7%, while that of all other modalities increased a combined total of 39.1%. During this 6-year period, RVU rates per 100,000 increased 14.6%, with RVUs for MR imaging increasing 76.6%; those for nuclear imaging, 38.7%; those for CT, 28.3%; and those for US, 24.2%. CONCLUSION: A 3.8% increase in the rate of NDI utilization occurred during the 6-year period between 1993 and 1999. A considerably larger increase in RVU rates (14.6%) occurred during the same time period.

Diagnostic Imaging↗

Practice patterns of radiologists and nonradiologists in utilization of noninvasive diagnostic imaging among the Medicare population 1993-1999.

PURPOSE: To compare nationwide trends in noninvasive diagnostic imaging (NDI) practice patterns of radiologists and of nonradiologists among the Medicare population during the 6 years from 1993 to 1999. MATERIALS AND METHODS: Medicare Part B claims files from 1993, 1996, and 1999 were analyzed for all procedure codes related to NDI. NDI codes were classified into 22 diagnostic categories within seven imaging modality groups. For each NDI code, physicians performing the services were classified as radiologists or nonradiologists by using the provider specialty code designated in claims in the files. The data were analyzed to determine the overall utilization rates and relative value unit (RVU) rate changes between 1993 and 1999 among radiologists and nonradiologists. RESULTS: In 1993, the overall NDI utilization rate per 100,000 Medicare fee-for-service beneficiaries was 215,652 for radiologists and 79,942 for nonradiologists. In 1999, the rate was 207,270 for radiologists and 100,059 for nonradiologists, which is a 3.9% decrease among radiologists and a 25.2% increase among nonradiologists. In the 6-year interval from 1993 to 1999, the overall RVU rate increased 6.9% among radiologists and 32.4% among nonradiologists. The percentage of NDI performed by radiologists decreased from 73.0% in 1993 to 67.4% in 1999. CONCLUSION: Overall, the utilization rate of advanced, high-technology imaging is increasing among both radiologists and nonradiologists. However, it is increasing at a considerably more rapid rate among nonradiologists.

Diagnostic Imaging↗

Basic characteristics of radiology practices: results from the American College of Radiology's 1999 survey.

OBJECTIVE: The basic characteristics of radiology practices in the United States are described. We defined radiology practices as diagnostic-radiology-only practices, either solo or multiradiologist practices. Findings were compared with those from other data sources. MATERIALS AND METHODS: In May 1999, the American College of Radiology surveyed 970 practices by mail using a 65-item questionnaire. A final response rate of 66% was achieved. Weighting was used to make responses representative of all radiology practices in the United States. RESULTS: Approximately 4400 radiology practices existed in the country; 39% were located in nonmetropolitan or rural areas. The greatest percentage of practices (85%) was private nonacademic radiology practices. The greatest percentage of practices (43%) served only hospitals. However, solo practices were particularly likely (p < or = 0.01) to serve only nonhospital sites. Of all multiradiologist practices, 87% were completely owned by their members, but approximately two thirds of academic multiradiologist practices had outside owners. Seventy percent of multiradiologist practices interpreted images from outside clinics or groups; these averaged 3.2 outside clinics or groups for which they interpreted images. CONCLUSION: The basic characteristics of radiology practices in 1999 are described. Good agreement was seen with findings obtained from other data sources.

Data Collection↗

Findings in 2002 from a help wanted index of job advertisements: is the job-market shortage of diagnostic radiologists easing?

OBJECTIVE: The goal of this study is to present the most recent data on the diagnostic radiology job market in the United States using a help wanted index of job advertisements. MATERIALS AND METHODS: All diagnostic radiology positions advertised in the American Journal of Roentgenology and Radiology from January through December 2002 were coded by practice type, geographic location, and subspecialty. Data were compared with the previously published results from 1991 through 2001. RESULTS: From January through December 2002, 5117 positions were advertised for diagnostic radiologists, representing a 10.4% decrease from 2001. The 12-month rolling average of job advertisements peaked at 488 in February 2002 and dropped to 432 by December 2002, a level not seen since August 2000. In 2002, 42.7% of positions advertised were academic, representing a steady increase from 34.0% in 1999. When comparing the 4-year periods 1999-2002 and 1995-1998, a statistically significant proportional increase was found for positions advertised in the Midwest. Statistically significant relative increases were also observed for the subspecialties of abdominal radiology, mammography, neuroradiology, pediatric radiology, chest radiology, and nuclear medicine. Statistically significant relative decreases were seen in general and vascular and interventional positions. CONCLUSION: The absolute demand for diagnostic radiologists nationwide appears to have stabilized during 2002, albeit at a level much higher than in previous years, and may be decreasing. A split seems to have appeared in the market between academia and private practice. Current policy should be directed toward increasing the supply of diagnostic radiologists, especially academicians.

Advertising↗

Characteristics of mixed diagnostic radiology-radiation oncology practices.

OBJECTIVE: Our objectives were to describe the characteristics of "mixed practices"-that is, practices performing both diagnostic radiology and radiation oncology services-and to compare mixed practices with multiradiologist diagnostic radiology-only practices. MATERIALS AND METHODS: In 1999, the American College of Radiology surveyed 970 practices by mail, using a 65-item questionnaire. A response rate of 66% was achieved. Responses were weighted such that they were representative of all the radiology practices in the United States. The estimates cited in this article were primarily drawn from this 1999 survey. RESULTS: Mixed practices were nearly evenly divided between large (area population, > or = 1 million) and small metropolitan areas (area population, from 50,000 to 1 million). We found that 63% of mixed practices were nonacademic private practices; 27% were academic. Approximately 50% contained 15 or more members. Mixed practices were predominantly owned by members of the practice and predominantly served both hospitals and nonhospital settings. At least 90% of mixed practices performed mammography, imaging-guided breast biopsy, sonography, and nuclear medicine. We found that compared with multiradiologist diagnostic radiology-only practices, mixed practices were larger and were more likely to be academic, to serve both hospital and nonhospital settings, and to perform interventional and nuclear medicine procedures. CONCLUSION: The characteristics of a mixed practice differ from those of a multiradiologist diagnostic radiology-only practice.

Group Practice↗

Radiation oncologists in 2000: demographic, professional, and practice characteristics.

PURPOSE: To describe the demographic, professional, and practice characteristics of radiation oncologists, emphasizing comparisons to data from a similar 1995 Survey. METHODS AND MATERIALS: In spring 2000, we surveyed 603 randomly selected radiation oncologists by mail, using a one-page questionnaire-455 responded. We weighted responses to make answers representative of all radiation oncologists in the United States. RESULTS: Approximately 45% of post-training, professionally active, radiation oncologists were <45 years old and 22% were women. Forty-two percent of radiation oncologists in training were women. Thirty-three percent of radiation-oncology-only practices were solo practices. The greatest percentage of post-training, professionally active, radiation oncologists were in nonacademic private radiation oncology practices. Fifty-three percent of post-training, professionally active, radiation oncologists reported that their workload was about right. Eighteen percent of individuals 60-64 years old and approximately two-thirds of those > or =65 years old were not working (retired). The full-time equivalency of those aged 55-74 fell by 12 percentage points between 1995 and 2000. CONCLUSIONS: Most demographic, professional, and practice characteristics remained relatively constant between 1995 and 2000, with the exception of work status patterns. Radiation oncologists reported a more balanced workload than that reported by diagnostic radiologists. The surplus of radiation oncologists, which was predicted in the mid-1990s, was not demonstrated.

Adult↗

Comparing the costs of radiation therapy and radical prostatectomy for the initial treatment of early-stage prostate cancer.

PURPOSE: Radical prostatectomy and external-beam radiation are the most common treatments for localized prostate cancer. Given the absence of clinical consensus in favor of one treatment or the other, relative costs may be a significant factor. This study compares the direct medical costs during the month before and 9 months after diagnosis for patients treated primarily with external-beam radiation or radical prostatectomy for early-stage prostate cancer. METHODS: Patients age 65 or older and coded by the Surveillance, Epidemiology, and End Results (SEER) registry as having been diagnosed with adenocarcinoma of the prostate treated primarily with external-beam radiation or radical prostatectomy during 1992 and 1993 were identified. The initial treatment costs, as measured by Medicare-approved payment amounts, for each strategy were analyzed using linked SEER-Medicare claims data after adjusting for differences in comorbidity and age. An intent-to-treat analysis was also performed to adjust for differences in staging between the two groups. RESULTS: For patients in the treatment-received analysis, the average costs were significantly different; $14,048 (95% confidence interval [CI], $13,765 to $14,330) for radiation therapy and $17,226 (95% CI, $16,891 to $17,560) for radical prostatectomy (P <.001). The average costs for patients in the intent-to-treat analysis were also significantly less for radiation therapy patients ($14,048; 95% CI, $13,765 to $14,330) than for those who underwent radical prostatectomy ($17,516; 95% CI, $17,195 to $17,837; P <.001). CONCLUSION: For patients with early-stage prostate cancer, average costs during the initial treatment interval were at least 23% greater for radical prostatectomy than for external-beam radiation. Major limitations of the research include not studying costs after the initial treatment interval and questionable current applicability, given changes in management of early prostate cancer.

Adenocarcinoma↗

Data from a professional society placement service as a measure of the employment market for radiation oncologists.

PURPOSE: To aid in understanding the employment market for radiation oncologists, we present annual data for 1991 to 2000 from the American College of Radiology's placement service, the Professional Bureau. This data series is twice as long as any previously available. Secondarily, we compare these data with other data on the employment market. METHODS AND MATERIALS: The trends in job listings, job seekers, and listings per seeker in the Bureau are tabulated and graphed. We calculate correlations and graph relationships between the last of these and measures of the job market calculated from annual surveys. RESULTS: Bureau data show listings per job seeker declined from 0.53 in 1991 to a nadir of 0.30 in 1995 and then recovered to 1.48 in 2000. Bureau listings and job seekers, each considered separately, show a similar pattern of job market decline and then eventual recovery to better than the 1991 situation. Bureau listings per job seeker correlate 0.895 with a survey-derived index of program directors' perceptions of the job market, but statistical significance is limited (p = 0.04), because very few years of survey data are available. CONCLUSIONS: The employment market for radiation oncologists weakened in the first half of the 1990s, as had been widely reported; we present the first systematic data showing this. Data from a professional society placement service provide useful and inexpensive information on the employment market.

Employment↗

Recent rapid increase in utilization of radionuclide myocardial perfusion imaging and related procedures: 1996-1998 practice patterns.

PURPOSE: To evaluate cardiac nuclear medicine practice patterns in different physician specialty groups to better understand a recent rapid increase in utilization of radionuclide myocardial perfusion imaging (MPI) and certain supplementary examinations. MATERIALS AND METHODS: National Medicare Part B databases from 1996 and 1998 were used to evaluate utilization of four primary procedure codes for radionuclide MPI and two supplementary codes (add-on left ventricular wall motion or left ventricular ejection fraction). Utilization rates were calculated for cardiologists, radiologists, and other physicians. Other cardiac imaging for which radionuclide imaging might be substituted was similarly studied. RESULTS: Overall utilization rate of radionuclide MPI per 100,000 Medicare beneficiaries increased 19.1%, from 4,046 in 1996 to 4,820 in 1998 (P <.001). However, for cardiologists the rate increased from 1,771 to 2,413 (36.3%), whereas for radiologists it increased from 1,958 to 2,031 (3.7%) (P <.001 for both changes). Overall utilization rate of add-on codes increased 264% from 1,006 to 3,657 (P <.001). By 1998, the ratio of these add-on examinations to primary MPI was 0.94 among cardiologists compared with 0.53 among radiologists (relative risk, 1.77; 95% CI: 1.76, 1.78). Cardiologist-performed stress echocardiography and cardiac catheterization and coronary angiography increased by 24.2% and 8.7%, respectively. CONCLUSION: Growth in utilization of radionuclide MPI between 1996 and 1998 was almost 10 times higher among cardiologists than radiologists. Utilization of the two add-on codes increased even more dramatically. The greater use of MPI is not a substitute for other cardiac imaging.

Cardiac Catheterization↗

Data from a professional society placement service as a measure of the employment market for physicians.

PURPOSE: To determine whether data from a professional society placement service--the Professional Bureau of the American College of Radiology--are a valid measure of the employment market. MATERIALS AND METHODS: For the United States from 1990 to 1998, the authors compared three placement service measures-the annual number of job listings, job seekers, and listings per seeker-with two presumably valid measures of the employment market-annual total jobs available (which was ascertained from surveys of hiring) and radiologist median income relative to the all-physician median. For the comparisons, both graphic displays of the data and correlation were used. RESULTS: In graphs, patterns of change were similar. The correlation of job listings, which measure demand, with total jobs, which also measure demand, was 0.84 (P =.04). The correlation of (a) job seekers, a measure of supply, and (b) listings per seeker, which involve both supply and demand, with total jobs was substantial but lower: 0.58 (P =.23) and 0.76 (P =.08), respectively. Correlation of the three placement service measures with relative income, which presumably depends on both supply and demand, was 0.80-0.88 (P <.05 for each measure). CONCLUSION: The statistical significance levels of the correlations and the pattern of findings--namely, stronger correlations among measures of the same aspect of the employment market--indicate that these placement service data are valid and reasonably accurate measures of the employment market.

Employment↗

Spinal injection procedures: volume, provider distribution, and reimbursement in the U.S. medicare population from 1993 to 1999.

PURPOSE: To evaluate spinal injection procedures for trends in volume, reimbursement, and physician specialty participation. MATERIALS AND METHODS: By using the 1993, 1996, 1998, and 1999 Medicare Part B claims database, we studied Current Procedural Terminology revision 4 codes used for percutaneous spinal injection procedures, including cervical and lumbar discography, disk aspiration and/or injection, facet and/or perifacet joint injection, and epidural steroid injection. For each of these procedures, volume, reimbursement, and physician specialty participation (categorized as radiology, anesthesiology, surgery, physiatry, and other specialties) for each year were recorded. RESULTS: Despite an overall increase in spinal injection procedure volume and reimbursement from 1993 to 1999, nonradiologists performed most of these procedures. Epidural steroid and facet joint injections had the highest volume and reimbursement during this time period and were performed almost exclusively by nonradiologists (predominantly anesthesiologists). Radiologists performed more discography procedures than did other specialists in 1993, but participation decreased each year, while anesthesiologist participation increased; as of 1999, anesthesiologists performed more discography procedures than did radiologists. Although radiologists performed more disk aspiration procedures than did other specialists, procedure volume remained low during the period studied. CONCLUSION: Spinal injection volume and reimbursement have increased substantially in the Medicare population from 1993 to 1999. During this interval, radiologist participation has decreased. Nonradiologists perform most spinal injection procedures.

Humans↗

Diagnostic radiologists in 2000: basic characteristics, practices, and issues related to the radiologist shortage.

OBJECTIVE: We sought to describe radiologists and their practices, emphasizing trends in retirement age, practice size, and perceived workload burden. MATERIALS AND METHODS: In spring 2000, we surveyed 3,027 randomly selected radiologists by mail, of whom 74% responded. We weighted responses to make answers representative of all radiologists and compared findings with a similar 1995 survey. RESULTS: Thirty percent of radiologists age 65-69 were working full-time; 21% were working part-time. Overall, the full-time equivalency of radiologists age 55-74 was 67.6%, not significantly different from 1995. If current patterns of retirement and production of graduates continue, the workforce will grow at a rate of approximately 2% annually. Fifty-one percent of radiologists said that recognizing that income depends largely on work done, they had "much too much work" or "somewhat too much work"; 5% reported "somewhat too little work" or "much too little work." Six percent of posttraining professionally active radiologists were in solo practice, down from 8% in 1995; 15% were in two-to-four-radiologists groups, down from 17%; and 38% were in groups of 15 or more, up from 30%. Sixteen percent of posttraining professionally active radiologists were women. The percentage was highest (29%) for those younger than age 35 but was lower (22%) among trainees. CONCLUSION: The findings of excess work are further evidence of a radiologist shortage. However, contrary to surveys of groups that are hiring, we found minimal evidence of earlier retirement. Nonetheless, workload currently is increasing faster than the workforce is likely to grow, so the shortage will probably intensify. The typical number of radiologists in a practice is increasing, but slowly.

Adult↗

Cardiovascular imaging: who does it and how important is it to the practice of radiology?

OBJECTIVE: Our research was conducted to ascertain the importance of noninvasive cardiovascular imaging to the practice of radiology and to determine what percentages of noninvasive cardiovascular imaging are performed by radiologists and by other types of physicians. MATERIALS AND METHODS: Using the national 1998 Medicare Part B database, we reviewed all 460 procedure codes pertaining to noninvasive diagnostic imaging and identified 65 that were specifically related to the cardiovascular system. These 65 codes were grouped in five categories: cardiac MR imaging, MR angiography, cardiovascular nuclear medicine, echocardiography, and vascular sonography. For each code and category, we determined the nationwide examination volume, the utilization rate per 1,000 Medicare fee-for-service enrollees, Part B physician reimbursements, and the percentages of examinations performed by radiologists, cardiologists, surgeons, and other physicians. RESULTS: During 1998, 19,244,001 noninvasive cardiovascular imaging studies were performed on Medicare enrollees, which accounted for 17.7% of all Medicare diagnostic imaging studies carried out that year and 33.6% of all Part B imaging-related reimbursements paid. The utilization rate for noninvasive cardiovascular imaging was 603 per 1,000 Medicare enrollees per year. Echocardiography alone accounted for 63.4% of these examinations. Radiologists conducted 16.7% of all noninvasive cardiovascular imaging, whereas cardiologists conducted 61.5%, surgeons 4.8%, and other physicians 16.9% of the examinations. The strong role of cardiologists was largely attributable to their dominance in echocardiography. Radiologists had a substantial role in all categories except echocardiography. CONCLUSION: Noninvasive cardiovascular imaging represents an important component of the practice of radiology. Radiologists have substantial participation in all aspects of the field with the exception of echocardiography.

Diagnostic Techniques, Cardiovascular↗

Determinants of differences among radiologists in starting salaries.

OBJECTIVE: We sought to ascertain the actual effect of each of a broad range of factors that plausibly might affect starting salary. MATERIALS AND METHODS: We surveyed radiologists who completed training in 1997 and obtained 487 relevant responses. Multiple regression analysis was used to identify the independent effects of characteristics of the physician, his or her job and employment search, and market area characteristics of his or her practice locality. RESULTS: Academic starting salaries were, other things equal, 6% below private practice. Residency-only graduates had incomes 7% below a typical fellowship income. Only a few fellowship fields garnered incomes that were significantly different from the typical income. More managed care in a locality was associated with lower income, and a higher percentage of elderly in the locality was associated with a higher income. We found no statistically significant (p < 0.05) effects of sex, job location constraints, local per capita income, local cost of living, or (generally) graduate quality as measured by the ranking of a graduate's residency program. CONCLUSION: The determinants of income are multiple and varied, including physician characteristics, such as field of subspecialty training; job characteristics, such as academic versus private practice employment; and market area characteristics. However, the study yielded as many puzzling, negative findings, such as the lack of effect of physician quality or of even severe locational constraints, as positive, expected findings.

Age Factors↗

Too few radiologists?

OBJECTIVE: The purpose of our study was to model the supply and demand for diagnostic radiologists over the next 30 years under alternative scenarios. MATERIALS AND METHODS: We used responses from the American College of Radiology's 2000 Survey of Diagnostic Radiologists and Radiation Oncologists to determine the current age distribution and activity of diagnostic radiologists. The numbers entering the profession were projected using three assumptions: no change in training programs, reduction of residency to 3 years (or otherwise increasing the annual number of graduates by one third), and elimination of most fellowship programs. Demand projections assume a 5% shortage in 2001 and depend on growth rates of the population, aging, scenarios of growth of age-standardized demand, and the effect of possibly productivity-enhancing technologies such as PACS (picture archiving and communication systems). RESULTS: Only a one-third increase in annual graduates materially increases the work-force relative to current training patterns. In all cases, the growth rate of the demand for radiologists far outstrips the supply over a 30-year horizon. In the shorter term, projections of current trends point to an increasing shortage, but rapid major productivity increases could produce a surplus. CONCLUSION: Those in the field of diagnostic radiology should consider measures to mitigate the increasing shortage, while monitoring developments that might signal departures from current trends in supply and demand.

Age Distribution↗

Body MR imaging and CT volume: variations and trends based on an analysis of medicare and fee-for-service health insurance databases.

OBJECTIVE: We examined Medicare and fee-for-service data sets to understand better the utilization of MR imaging for imaging the pelvis, abdomen, and chest relative to its use in imaging for other body parts and to the utilization of CT. MATERIALS AND METHODS: CT and MR imaging procedure volumes for pelvis, abdomen, chest, and total were extracted from the 1993, 1996, and 1999 Health Care Financing Administration Physician/Supplier Procedure Summary Master Files, based on CPT-4 codes. We also analyzed a fee-for-service health insurance database for January 1998 through July 1999 from a single northeastern state, which included provider location (rural, suburban, or urban) and type (teaching or nonteaching site). RESULTS: The greatest 3-year Medicare increase was for abdominal MR imaging, from 1996 to 1999 (101% increase). However, pelvic, abdominal, and chest MR imaging together remained less than 5% of total MR imaging. Abdominal MR imaging increased more than did total MR imaging in all 10 Health Care Financing Administration regions. In the fee-for-service database, the relative procedure volume of abdominal MR imaging varied approximately fivefold from rural to urban provider locations, and approximately double from nonteaching to teaching hospitals. CONCLUSION: Although far more abdominal CT than abdominal MR imaging is performed, the rate of abdominal MR imaging utilization has increased more rapidly since 1993. The relative procedure volume of abdominal MR imaging varied more than fivefold from rural to urban provider locations and double from nonteaching to teaching hospitals.

Abdomen↗