docs(data-integration): key facility Locations on ccn or ncpdp_id - #65
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akim1995 wants to merge 2 commits into
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docs(data-integration): key facility Locations on ccn or ncpdp_id#65akim1995 wants to merge 2 commits into
akim1995 wants to merge 2 commits into
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A Medicare-certified facility has a CMS Certification Number and a pharmacy has an NCPDP Provider ID. Both identify the site and survive the address being reworded, which is what mints duplicate Locations today.
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Two optional columns on
facilities, and a rule for what keys a Location.Locations are currently keyed on the address, because a practitioner roster carries no site key. That is right for a practice site and wrong to generalise: two provider classes do have a stable per-location identifier, both already present on their billing data.
ccnncpdp_idAn identifier is preferred over the address because it survives rewording between extracts. That is not theoretical:
address-variants.mdmeasured 1,086 of 13,481 distinct (street, ZIP) places carrying more than one raw spelling, covering 24% of the published directory. Externally, CMS directory reviews put ~48.7% of Medicare Advantage locations at one or more inaccuracy, and a study of 4,754 dermatologist listings found 45.5% duplicated within a single plan's own directory.Both columns are optional and neither changes the fallback: with no identifier the address still keys the Location.
The same two rows and the same cross-cutting rule are going into
spec-provider-directory-csv.md.