There are substantial unmet needs for rehabilitation and numerous barriers to accessing services. Efforts need to focus on building the capacity for rehabilitation research predominantly in low- and middle-income countries. The comprehensive data that this review provides is useful for raising awareness for the need of rehabilitation at policy level. Implications for rehabilitation There is a profound need for rehabilitation services due to the ageing population and growing prevalence of non-communicable diseases. This scoping review shows that the need for rehabilitation considerably outstrips the provision of services. There are substantial unmet needs for rehabilitation and numerous barriers to accessing services. Concerted global action to scale up quality rehabilitation services is needed, especially in low- and middle-income countries.