Objective: To verify the association between social determinants of health and access to health services for COVID-19 patients. Method: Analytical, cross-sectional study, carried out in three states in the Northeast of Brazil (Ceará, Maranhão and Pernambuco), with 968 patients, using questionnaires with sociodemographic data, determinants and the Primary Care Assessment Tool, adapted to the reality of COVID-19, with 58 items, classified as high (score ≥ 6.6) and low (score < 6.6), whose high value reveals better standards of access to health services. The Chi-square test was used for comparative analysis. Results: There was a significant difference (p < 0.05) between the domains of the instrument and the following determinants: age, skin color, body mass index, origin, schooling, employment, services close to home, first service, income and means of transport. Conclusion: Access to health services for people with COVID-19 was associated with various determinants, including individual, behavioural and social ones, correlated with the structural and organizational aspects of the health services offered by the three states of Northeastern Brazil.