The encrypted NCPDP identifier for a business entity that has been reported to serve as the headquarters for chains, buying groups or third party contracting organizations. There may be multiple relationship IDs (variable called RELATIONSHIP_ID) that link to a common parent organization.
This variable was new in 2012.
A single parent organization ID will generally relate to multiple CCW_PHARM_IDs (i.e., multiple pharmacies can have the same parent company).
Additional details regarding the National Council for Prescription Drug Programs (NCPDP) source data are available at: https://www.ncpdpdataq.org/dataQInfo/pages/dataQFiles.htm.
Source: NCDPD DataQ™