Correction to: Health Res Policy Sys (2021) 19:77 http://doi.org/10.1186/s12961-021–00730-0

It was highlighted that the original article [1] contained some typesetting errors in Table 1. Namely onn the row for "Medicaid $ per enrollee," there is an incorrect value (5,1205,120). That value should be 5,120 and in the Republican row there was an extra mention of value "34 (35.4)". This Correction article shows the correct table. The original article has been updated.

Table 1 Demographic variables and primary care access by Affordable Care Act Medicaid expansion status, 2012–2015