Who Serves Where: A Geospatial Analysis of Access to Endocrine Surgeons in the United States and Puerto Rico.

backgroundThe association between surgical volume and patient outcome is well established, with higher case volume associated with a lower risk of complications. We hypothesized that the geographic distribution of endocrine/head and neck surgeons with an endocrine focus in the United States and Puerto Rico may limit access to many potential patients, particularly in rural areas.

methodsWe used web-based directories from the American Association of Endocrine Surgeons, American Head and Neck Society, and the American Academy of Otolaryngology-Head and Neck Surgery to identify endocrine surgery specialists in the United States and Puerto Rico. Using geographic coordinates and OpenStreetMap and Valhalla software, we calculated the areas within a 60-, 90-, or 120-minute driving distance from specialist offices. We used 2020 U.S. Census Data to calculate census tract populations inside or outside the accessible areas.

resultsExcluding duplicate providers across organizations, we geocoded 603 specialist addresses in the United States and Puerto. We found that 23.76% (78.3 million) of Americans do not have access to a society-affiliated endocrine/head and neck surgeon with an endocrine focus within a 60-minute drive, 14.37% (47.4 million) within a 90-minute drive, and 8.38% (27.6 million) within a 120-minute drive. We observed that the areas of coverage are primarily focused on metropolitan areas.

conclusionNearly one-third of Americans do not have access to a society-affiliated endocrine/head and neck surgeon with an endocrine focus within a 1-hour drive, highlighting a concerning geographic barrier to care. Further work is needed to facilitate patient access and mitigate disparities in quality care.