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Using claims data from a large German statutory health insurance, we find that after physicians leave, their former patients persistently reduce their primary care utilization, only partially substituting it with specialist visits and hospital care. Because patients find a new GP already 1.1 quarters after the old resigns, on average, the persistent effects must be explained through the new GP. Indeed, the new GP serves more patients but performs less diagnostic testing. Our results reveal a substantial decrease in diagnoses of many relevant chronic conditions (such as congestive heart failure and diabetes), suggesting that disruptions may have adverse consequences for the efficiency of the healthcare system. This indicates that continuity in primary care is pivotal and shows that the GP has an essential role in healthcare delivery, particularly in healthcare systems such as Germany, where GPs often have a high workload and little consultation time.<\/jats:p>","DOI":"10.1002\/hec.4941","type":"journal-article","created":{"date-parts":[[2025,1,31]],"date-time":"2025-01-31T04:04:12Z","timestamp":1738296252000},"page":"932-955","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["The Effects of Resigning GPs on Patient Healthcare Utilization and Some Implications for Health"],"prefix":"10.1002","volume":"34","author":[{"given":"Daniel","family":"Monsees","sequence":"first","affiliation":[{"name":"RWI Essen  Essen Germany"},{"name":"Leibniz Science Campus Ruhr  Essen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1215-8863","authenticated-orcid":false,"given":"Matthias","family":"Westphal","sequence":"additional","affiliation":[{"name":"RWI Essen  Essen Germany"},{"name":"Leibniz Science Campus Ruhr  Essen Germany"},{"name":"Faculty of Business Administration and Economics, Chair for Economic Policy University in Hagen  Hagen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,1,30]]},"reference":[{"issue":"8","key":"e_1_2_11_2_1","article-title":"Einsparpotenziale durch ambulant\u2010sensitive Krankenhausf\u00e4lle (ASK)","volume":"15","author":"Albrecht M.","year":"2015","journal-title":"Versorgungsatlas.de"},{"key":"e_1_2_11_3_1","article-title":"BARMER Krankenhausreport 2022","volume":"35","author":"Augurzky B.","year":"2022","journal-title":"Schriftenreihe zur Gesundheitsanalyse"},{"key":"e_1_2_11_4_1","doi-asserted-by":"publisher","DOI":"10.3399\/bjgp20x712289"},{"key":"e_1_2_11_5_1","volume-title":"Indikatoren und Karten zur Raum\u2010 und Stadtentwicklung. 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