NBER affiliates can access this and other data through the NBER computing system. Files can be located using the directory path of each download link replacing "https://data.nber.org/" with "/homes/data/". For example, these POS datasets can be found under "/homes/data/pos/" on the internal NBER computer cluster. For more information on the data available on the internal server see NBER Internal Data Collection page.
Provider of service data is collected from CMS Form 1539 plus Medicare/Medicaid applications for certification:
The naming covention changed to mnemonic names from PROVNNNN-type names in 2011. A crosswalk for select variables is available.
The Provider of Service file includes provider ZIP Code. A ZIP Code distance database is also available.
The provider category code variable lists the categories of providers or suppliers from 1991-on that are included in the provider of service file.
Some Hospitals ( provider category = "01" ) have an "E" or "F" in position 6 of the provider number. The "E" indicates a Non-federal emergency hospital. The "F" indicates a Federal emergency hospital. See 2779E on page 13 of R29SOMA.pdf. These hospitals are non-participating hospitals where participting is defined in part of Title XVIII in 1866.
The Provider of Services file is a historic file, so only a recent file might be needed.