METHODS: Six electronic databases were searched for relevant studies from 2000 to 2019. Forty-one eligible studies were identified. RESULTS: Findings suggest that the people with disabilities' choice to seek healthcare services or not, as well as the quality of intervention provided by primary healthcare providers, are influenced by three types of barriers: cultural beliefs or attitudinal barriers, informational barriers, and practical or logistical barriers. CONCLUSION: In order to achieve full health coverage at acceptable quality for people with disabilities, it is necessary not only to consider the different barriers, but also their combined effect on people with disabilities and their households. It is only then that more nuanced and effective interventions to improve access to primary healthcare, systematically addressing barriers, can be designed and implemented.IMPLICATIONS FOR REHABILITATIONPeople with disabilities in both high income and low- and middle-income country settings are more likely to experience poorer general health than people without disabilities.Barriers to accessing primary healthcare services for people with disabilities result from a complex and dynamic interacting system between attitudinal and belief system barriers, informational barriers, and practical and logistical barriers.Given primary healthcare is often the initial point of contact for referral to specialty care and rehabilitation services, it is crucial for people with disabilities to access primary healthcare services in order to get appropriate referrals for such services, specifically rehabilitation as appropriate.To achieve full health coverage at acceptable quality for people with disabilities, starting with primary healthcare, it is necessary for healthcare stakeholders, including rehabilitation professionals, to consider the combined and cumulative effects of the various barriers to healthcare on people with disabilities and their families and develop an understanding of how healthcare decisions are made by people with disabilities at the personal and the household level.