Among adults aged 18 years or older, 13.9% were without a usual place of health care in 2017.
Adults in the South (16.4%) were more likely be without a usual place of health care compared with adults in the West (14.4%) and Midwest (12.7%). Adults in the Northeast (9.4%) were least likely to be without a usual place of health care.
Source: Tables of Summary Health Statistics, 2017. https://ftp.cdc.gov/pub/Health_Statistics/NCHS/NHIS/SHS/2017_SHS_Table_A-16.pdf.