{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,17]],"date-time":"2026-03-17T17:51:17Z","timestamp":1773769877655,"version":"3.50.1"},"reference-count":61,"publisher":"Oxford University Press (OUP)","issue":"1","funder":[{"name":"National Library of Medicine of the National Institutes of Health","award":["R01LM012196"],"award-info":[{"award-number":["R01LM012196"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2017,1,1]]},"abstract":"<jats:p>Objective: The purpose of this study was to measure the number of repeat computed tomography (CT) scans performed across an established health information exchange (HIE) in New York City. The long-term objective is to build an HIE-based duplicate CT alerting system to reduce potentially avoidable duplicate CTs.<\/jats:p>\n               <jats:p>Methods: This retrospective cohort analysis was based on HIE CT study records performed between March 2009 and July 2012. The number of CTs performed, the total number of patients receiving CTs, and the hospital locations where CTs were performed for each unique patient were calculated. Using a previously described process established by one of the authors, hospital-specific proprietary CT codes were mapped to the Logical Observation Identifiers Names and Codes (LOINC\u00ae) standard terminology for inter-site comparison. The number of locations where there was a repeated CT performed with the same LOINC code was then calculated for each unique patient.<\/jats:p>\n               <jats:p>Results: There were 717\u2009231 CTs performed on 349\u2009321 patients. Of these patients, 339\u2009821 had all of their imaging studies performed at a single location, accounting for 668\u2009938 CTs. Of these, 9500 patients had 48\u2009293 CTs performed at more than one location. Of these, 6284 patients had 24\u2009978 CTs with the same LOINC code performed at multiple locations. The median time between studies with the same LOINC code was 232 days (range of 0 to 1227); however, 1327 were performed within 7 days and 5000 within 30 days.<\/jats:p>\n               <jats:p>Conclusions: A small proportion (3%) of our cohort had CTs performed at more than one location, however this represents a large number of scans (48\u2009293). A noteworthy portion of these CTs (51.7%) shared the same LOINC code and may represent potentially avoidable studies, especially those done within a short time frame. This represents an addressable issue, and future HIE-based alerts could be utilized to reduce potentially avoidable CT scans.<\/jats:p>","DOI":"10.1093\/jamia\/ocw035","type":"journal-article","created":{"date-parts":[[2016,5,14]],"date-time":"2016-05-14T04:36:46Z","timestamp":1463200606000},"page":"30-38","source":"Crossref","is-referenced-by-count":12,"title":["Patient crossover and potentially avoidable repeat computed tomography exams across a health information exchange"],"prefix":"10.1093","volume":"24","author":[{"given":"Benjamin H","family":"Slovis","sequence":"first","affiliation":[{"name":"The Department of Emergency Medicine, Icahn School of Medicine at Mount Sinai, NY 10029, USA"},{"name":"The Department of Biomedical Informatics, Columbia University, NY 10032, USA"}]},{"given":"Tina","family":"Lowry","sequence":"additional","affiliation":[{"name":"The Department of Emergency Medicine, Icahn School of Medicine at Mount Sinai, NY 10029, USA"}]},{"given":"Bradley N","family":"Delman","sequence":"additional","affiliation":[{"name":"The Department of Radiology, Icahn School of Medicine at Mount Sinai, NY 10029, USA"}]},{"given":"Anton Oscar","family":"Beitia","sequence":"additional","affiliation":[{"name":"The Department of Emergency Medicine, Icahn School of Medicine at Mount Sinai, NY 10029, USA"}]},{"given":"Gilad","family":"Kuperman","sequence":"additional","affiliation":[{"name":"The Department of Biomedical Informatics, New York-Presbyterian Hospital, NY 10032, USA,"}]},{"given":"Charles","family":"DiMaggio","sequence":"additional","affiliation":[{"name":"The Department of Surgery, New York University Medical School, NY 10016, USA"}]},{"given":"Jason S","family":"Shapiro","sequence":"additional","affiliation":[{"name":"The Department of Emergency Medicine, Icahn School of Medicine at Mount Sinai, NY 10029, USA"}]}],"member":"286","published-online":{"date-parts":[[2016,5,13]]},"reference":[{"issue":"5","key":"2020110612374359700_ocw035-B1","doi-asserted-by":"crossref","first-page":"698","DOI":"10.1136\/amiajnl-2011-000140","article-title":"A framework for assessing patient crossover and health information exchange value","volume":"18","author":"Laborde","year":"2011","journal-title":"J Am Med Inform Assoc."},{"issue":"22","key":"2020110612374359700_ocw035-B2","doi-asserted-by":"crossref","first-page":"1989","DOI":"10.1001\/archinternmed.2010.439","article-title":"Patients treated at multiple acute health care facilities: quantifying information fragmentation","volume":"170","author":"Bourgeois","year":"2010","journal-title":"Arch Int Med."},{"key":"2020110612374359700_ocw035-B3","first-page":"409","article-title":"All health care is not local: an evaluation of the distribution of Emergency Department care delivered in Indiana. 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