Digital communication technologies can be used for team consultation, case management, and information sharing in health and mental health services for children and young people (CYP). The objective of the systematic review was to investigate the evidence as to whether digitally-mediated team communication for CYP improves outcomes. We searched PsycINFO, PubMed, Web of Science, and Cochrane Library for relevant studies. Results were synthesised narratively. Seven studies were identified from 439 initial records. Analysis highlighted that digitally-mediated team communication is generally valued by professionals for supporting practice and that there is overall satisfaction with the process. There was preliminary evidence (from one study) that clinical outcomes from digitally-mediated team communication are comparable to those achieved by a collaborative service model with direct specialist care to service users via digital communication technology. There is a need for further high-quality research into clinical outcomes and service user experience, as well as financial implications.