BackgroundWhile no normative definition exists, medical professionalism emphasises a set of values, behaviours and relationships that underpin public trust in a physician. The empirical setting for this study is the Irish health care system where GPs receive income through a unique mix of private fee income and state funded capitation. GPs’ income per patient has fallen by 33% under state schemes between 2008 and 2013 due to changes in health policy and national fiscal constraints.AimThis paper examines how general practitioners conceptualise and operationalise medical professionalism and financial self-interest in the Irish healthcare system.MethodTo address this research aim, a historical documentary analysis (2009–2016) of national and medical newspapers was used to investigate GPs’ expressions of medical professionalism and financial self-interest.ResultsThe vagueness of language in differing definitions of medical professionalism may lead to a GP having a fluid interpretation depending on the situation. While general practitioners expressed core humanistic values, such as empathy and compassion, the expression of altruistic values were limited when practitioners indicated there was constraint on the financial resources of a practice.ConclusionCentral to the analysis of a medical practitioner’s treatment of patients and receipt of fee income is the tension between medical professionalism and financial self-interest. Developing an understanding of this tension has implications for those undertaking healthcare policy initiatives and the recruitment and retention of general practitioners in primary care.