This post responds to several requests for our office to estimate the cost of providing full-scope Medi-Cal coverage to undocumented adults over the age of 19 who are currently eligible for restricted-scope Medi-Cal coverage (that is, primarily emergency and pregnancy-related services). Based on a number of key assumptions, we estimate the total net state cost of this coverage expansion is approximately $3 billion in 2018-19. This net cost would be fully a state cost, and represents the change between the cost of providing full-scope Medi-Cal and the costs of providing restricted-scope Medi-Cal to the undocumented adult population.