I am looking for data that contains a list of National Provider Identification Numbers (NPI) that correspond to Medicaid Provider Identification Numbers or OSHPD ID numbers. In particular, does anyone know of a source that contains OSHPD ID and NPI codes for each California Hospital/Clinic?
I am aware that these NPI files contains NPI's linking to providers. But I am curious if there are separate sources that already link California's identifying variables for healthcare providers with the NPI key variable. Otherwise, it would require a significant amount of dirty work to algorithm match them and I may as well see if the work is already done.