Marc Ginsberg (University of Illinois at Chicago), The Ultra (And Nearly Ultra) Locality Rules Persist! Why Continue To Ignore Modern Medicine and Contort The Standard of Care? (2024):

The use of the locality rule to define or modify the medical standard of care is inconsistent with modern medicine.  Nevertheless, various states in the U.S. continue to adhere to a locality rule.  This paper revisits this topic, about which I have previously written, by focusing on Idaho, Nebraska, Tennessee and Arkansas.  The paper concludes by suggesting that locality rules should be eliminated in favor of a national standard of care.