Background: A growing workforce is being employed internationally to assist patients in navigating between health and social care providers. Commonly used role titles include patient navigator, link worker, and coordinator, to name a few. These professionals operate under various care models including care navigation, social prescribing, case management, and care coordination. Improving the understanding of these roles by health and social care providers may help to better embed care navigators into existing systems to support care integration. Methods: An umbrella review was conducted (PROSPERO: CRD42024572605) and five databases (MEDLINE, Embase, CINAHL, Scopus, PsycINFO) were searched to May 2024. Reviews were included if they discussed the role or function, or models of care where workers who coordinated services involving health and social or community care. A thematic data synthesis approach was used for analysis. Results: Twenty-six review articles were included, which synthesised 824 unique primary peer-reviewed sources. Seventy-eight unique role titles were used to describe care navigators, which aggregated under seven broad role categories: Patient Navigator, Link Worker, Care Coordinator, Case Manager, Social Prescriber, Intermediary, Health Mediator. Among the significant variability and complexity of role scope and role titles used in the field, the most common titles were Patient Navigator (n=11 reviews) and Link Worker (n=9 reviews). Tasks related to care navigation, building service users’ capacity for self-management, and providing person-centred care overlapped substantially across all role categories. Patient Navigators’ scope of practice included education, appointment coordination, and assistance with logistic issues (e.g., transportation), while the roles of Link Workers typically provided referral-based personalised navigation and developed capacity for self-management. Conclusions: Interchangeable role titles and overlapping scope and tasks create complexity and confusion for service users, providers, and researchers. An international Delphi study could create a consensus on the nomenclature and taxonomy for navigator roles interfacing between health and social care systems to clarify role functions and boundaries to improve integrated service delivery. Developing professional identities, training, and strategies to seamlessly embed such roles into existing health and social care structures is also needed.