We don’t sell ranking and don’t accept payment to move a provider up the list. For final hire decisions, verify licensing, insurance, and references directly with the applicable licensing or credentialing body.
No bulk-licensing source family is currently ingested for this vertical. Hire-time checking still routes through the body named above.
5.52 active gastroenterologists per 100,000 residents — ranked 27 of 51 U.S. states + DC.
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South Dakota has 51 active gastroenterologists (5.52 per 100,000 residents) — ranked 27 of 51 U.S. states + DC. Source: CMS NPPES NPI Registry + U.S. Census Bureau, snapshot 2026-05-06. Threshold for "underserved" in the parent study: 4 per 100,000. Citation: Fonteum Research, /research/gastroenterologist-supply-by-state-2026.