National Neighborhood Data Archive (NaNDA): Ophthalmologists by Census Tract and ZCTA, United States, 1990-2021

Description This dataset contains measures of the number and density of ophthalmologists per United States Census Tract or ZIP Code Tabulation Area (ZCTA) from 1990 through 2021. The dataset includes four separate files for four different geographic areas (GIS shapefiles from the United States Census Bureau). The four geographies include:<br>Census Tract 2010Census Tract 2020 ZIP Code Tabulation Area (ZCTA) 2010ZIP Code Tabulation Area (ZCTA) 2020 Information about which dataset to use can be found in the Usage Notes section of this document.<br>