{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T13:24:29Z","timestamp":1787059469077,"version":"build-2736575974"},"reference-count":63,"publisher":"SAGE Publications","issue":"4","license":[{"start":{"date-parts":[[2025,12,29]],"date-time":"2025-12-29T00:00:00Z","timestamp":1766966400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"funder":[{"DOI":"10.13039\/100000957","name":"Alzheimer's Association","doi-asserted-by":"publisher","award":["Clinician-Scientist Fellowship to Promote Diversit"],"award-info":[{"award-number":["Clinician-Scientist Fellowship to Promote Diversit"]}],"id":[{"id":"10.13039\/100000957","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Journal of Alzheimer\u2019s Disease"],"published-print":{"date-parts":[[2026,2]]},"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Research suggests that Lewy body dementia (LBD) is underdiagnosed, but reasons for this are under-studied.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To investigate the frequency of diagnosis codes aligned with LBD symptoms in Medicare beneficiaries.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>The frequency of ICD-10 codes associated with dementia and core and supportive LBD features was assessed in a 15% random sample of Medicare fee-for-service beneficiaries (2017\u20132020). The frequency of diagnosis codes was assessed in the full cohort and a cohort with an LBD diagnosis code, overall and stratified by ethnoracial group. Differences between groups were assessed using chi-square and Mantel-Haenszel chi-square tests.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>The study included 4,261,782 Medicare beneficiaries, 22,092 (0.5%) with an ICD-10 code for LBD. Diagnosis codes for REM sleep behavior disorder (RBD) were infrequent, whereas parkinsonism, hallucinations, and new onset schizophrenia were diagnosed more frequently than LBD. Of the total cohort, 1.6% of beneficiaries had a non-LBD dementia code plus at least one core LBD feature. LBD was least commonly diagnosed in Black, Asian\/Pacific Islander, and American Indian\/Alaskan Native cohorts. RBD and parkinsonism were also less frequently coded in these groups. Hallucinations were more frequently coded in Black and American Indian\/Alaskan Native beneficiaries and they had the highest frequency of very late onset schizophrenia diagnoses.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>These findings suggest LBD is likely underdiagnosed overall and in certain ethnoracial groups. Identifying RBD and parkinsonism and recognizing new-onset hallucinations as an LBD feature could improve diagnosis. Further research is needed to investigate reasons for LBD under-diagnosis and to identify strategies to improve LBD diagnosis across all groups.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/13872877251409214","type":"journal-article","created":{"date-parts":[[2025,12,29]],"date-time":"2025-12-29T17:01:44Z","timestamp":1767027704000},"page":"1688-1701","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Symptom diagnosis codes informing under-diagnosis of Lewy body dementia in Medicare beneficiaries from different ethnoracial backgrounds"],"prefix":"10.1177","volume":"109","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8545-6127","authenticated-orcid":false,"given":"Wei-Han","family":"Chen","sequence":"first","affiliation":[{"name":"Department of Pharmaceutical Outcomes and Policy, College of Pharmacy, University of Florida, Gainesville, FL, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9799-2592","authenticated-orcid":false,"given":"Jingchuan","family":"Guo","sequence":"additional","affiliation":[{"name":"Department of Pharmaceutical Outcomes and Policy, College of Pharmacy, University of Florida, Gainesville, FL, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5939-2887","authenticated-orcid":false,"given":"Shellie-Anne","family":"Levy","sequence":"additional","affiliation":[{"name":"Department of Clinical and Health Psychology, The Center for Cognitive Aging and Memory, University of Florida, Gainesville, FL, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-6930-8134","authenticated-orcid":false,"given":"Carolyn B.","family":"Britton","sequence":"additional","affiliation":[{"name":"Department of Neurology, Columbia University, New York, NY, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2163-1907","authenticated-orcid":false,"given":"Melissa J.","family":"Armstrong","sequence":"additional","affiliation":[{"name":"Department of Neurology, University of Florida College of Medicine, Gainesville, FL, USA"},{"name":"Norman Fixel Institute for Neurological Diseases, Gainesville, FL, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2025,12,29]]},"reference":[{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jalz.2016.04.002"},{"key":"e_1_3_3_3_2","doi-asserted-by":"publisher","DOI":"10.1212\/WNL.0000000000004058"},{"key":"e_1_3_3_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jns.2021.120077"},{"key":"e_1_3_3_5_2","article-title":"The prevalence and incidence of dementia with Lewy bodies: a systematic review","volume":"43","author":"Hogan DB","year":"2016","unstructured":"Hogan DB, Fiest KM, Roberts JI, et al. 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