In most of rural America, a colonoscopy means a long drive — or it doesn't happen. This is a county-by-county map of where gastroenterology care is registered, and where colorectal cancer is hitting hardest.
GI access shades each county by how much gastroenterology is registered there — the deepest shade is a county with no GI registered to a primary in-county practice address. Colorectal-cancer mortality shades each county against the national county median (14.7 per 100,000). The two views together show where the workforce gap and the outcomes line up. Hover any county for its numbers.
A caveat, stated up front. The supply view rests on a public registry (the CMS Doctors & Clinicians file), counted by primary specialty and primary practice address. It's a snapshot that lags — it won't capture a recent arrival, locum coverage, or a clinician who registers a primary address elsewhere. It shows where standing in-county GI care is registered, not a literal census of every clinician. The relative pattern — vast rural under-coverage — is what's robust.