Geocommons Hospital Referral Region KML Boundaries Data Sources May 21, 2014August 3, 20180 Geocommons is a public community of users who are building an open repository of data and maps. This particular dataset provides Hospital Referral Region (HRR) boundaries in KML as well as Shapefile format. The boundaries data were originally taken from Dartmouth Health Atlas Crosswalks and Boundary Files Information on the HRR locations is also downloadable as a spreadsheet in the XLSX format. https://www.cms.gov/Research-Statistics-Data-and-Systems/Statistics-Trends-and-Reports/Medicare-Geographic-Variation/GV_PUF.html Are you using this data source? Share your experience with it by leaving a reply below!