Hospital Service Areas
Hospital Service Areas (HSAs) were created through The Dartmouth Atlas of Health Care many years ago using ZIP Code boundaries (not to be confused with ZCTA boundaries). ZIP Code boundaries and the Census geographic units in MABLE do not share a geographic hierarchy, so they do not link together without overlap between the geographies. HSAs are nested within HRRs (see next entry for HRRs).
A base crosswalk file was created for MABLE between 2010 Census Blocks (using internal points) and HSAs, using point-in-polygpon GIS processing allowing HSAs to be added to the MABLE database.
For more information on the creation of HSAs see
For questions about HSA data, contact Nancy Marth at the Dartmouth Institute For Health Policy and Clinical Practice.
Hospital Referral Regions
These regions are closely related to the HSA geographies described just above. The methodology
for creating them, contact information, etc. are the same. HSA's nest within these referral
For additional background information on any of the geographic units
maintained or utilized by the Census Bureau you can view the
Geographic Areas Reference
Manual which is now available on the Geography Divsion's
Other useful links: