The details of one's insurance coverage may require or encourage registration with a primary care provider. 2017 data suggest that almost 20 percent of primary care physicians ere practicing in National Committee for Quality Assurance recognized patient-centered medical homes with 100 insurers providing financial incentives, targeted contractual arrangements or technical assistance. Percentages/numbers likely of be higher now. https://www.ncqa.org/wp-content/uploads/2019/06/06142019_WhitePaper_Milliman_BusinessCasePCMH.pdf