Patient reported outcome measures (PROMs) capture patients' views of their health status and the use of PROMs as part of standard care of children and young people has the potential to improve communication between patients/carers and clinicians and the quality of care. Electronic systems for the collection of or access to PROMs and integrating PROMs into electronic health records facilitates their implementation in routine care and could help maximise their value. Yet little is known about the technical aspects of implementation including the electronic systems available for collection and capture and how this may influence the value of PROMs in routine care which this scoping review aims to explore. The Joanna Briggs Institute review process was used. Seven databases were searched (Emcare, Embase MEDLINE, APA PsychInfo, Scopus and Web of Science), initially in February 2021 and updated in April 2023. Only studies that mentioned the use of electronic systems for the collection, storage and/or access of PROMs as part of standard care of children and young people in secondary (or tertiary) care settings were included. Data were analysed using frequency counts and thematically mapped using basic content analysis in relation to the research questions. From the 372 studies that were eligible for full text review, 85 studies met the inclusion criteria. The findings show that there is great variability in the electronic platforms used in the collection, storage and access of PROMs resulting in different configurations and fragmented approaches to implementation. There appears to be a lack of consideration on the technical aspects of the implementation such as the accessibility, useability and interoperability of the data collected. Electronic platforms for the collection and capture of PROMs in routine care of CYP is popular, yet, further understanding of the technical considerations in the use of electronic systems for implementation is needed to maximise the potential value and support the scalability of PROMs in routine care.