BACKGROUND: Person-centred care (PCC) is promoted as an innovation that will improve patients' rights and increase their participation in healthcare. Experience shows that the implementation of PCC is challenging and often results in varying levels of adoption. How health care professionals (HCPs) perceive an innovation such as PCC is an important factor to consider in implementation. Yet, such studies are scarce. Thus, in a sample of healthcare units in a region in Sweden, involved in a transition to PCC, we aimed to investigate HCPs' perceptions of PCC. METHODS: An interview study was conducted in 2018 during the implementation of PCC with HCPs (n = 97) representing diverse vocational roles in six healthcare contexts. Data were collected via focus groups (n = 15), dyadic interviews (n = 5), and individual interviews (n = 22) and analysed using a deductive-inductive content analysis. The deductive approach was guided by the Consolidated Framework for Implementation Research (CFIR), followed by an inductive analysis to describe HCPs' in-depth perceptions of PCC in relation to each of the CFIR constructs. RESULTS: Eight constructs from two of the CFIR domains, Intervention characteristics and Inner setting, were used to code HCPs' perceptions of PCC. One construct, Observability, was added to the coding sheet to fully describe all the data. The constructs Relative advantage, Complexity, Compatibility, Observability, and Available resources were discussed in depth by HCPs and resulted in rich and detailed data in the inductive data analysis. This analysis showed large variations in perceptions of PCC among HCPs, based on factors such as the PCCs ethical underpinnings, its operationalisation into concrete working routines, and each HCPs' unique recognition of PCC and the value they placed on it. CONCLUSIONS: We identified nine CFIR constructs that seem pertinent to HCPs' perceptions of PCC. HCPs report an array of mixed perceptions of PCC, underlining its complex nature. The perceptions are shaped by a range of factors, such as their individual understandings of the concept and the operationalisation of PCC in their local context. Stakeholders in charge of implementing PCC might use the results as a guide, delineating factors that may be important to consider in a wide range of healthcare contexts.