Get the National Drug Codes (NDCs) for the RxNorm concept identified by rxcui. The history parameter selects NDCs currently associated with the concept (i.e., NDCs present in the current version of RxNorm), NDCs ever associated with the concept, or NDCs ever associated with the concept or any obsolete concept remapped into it.
The result status element categorizes NDC associations as "direct" or "indirect". NDCs associated by RxNorm with rxcui are categorized as "direct". If history option 2 was requested, NDCs that RxNorm associated with another concept, which subsequently was remapped to rxcui, are also included and are categorized as "indirect".
For each NDC association, the result indicates by startDate and endDate the first and last releases of RxNorm that indicated the association. NDC associations that are still in effect have an endDate of the current RxNorm release.
Current and Historical: concepts in current and previous RxNorm data sets.
National Drug Codes (NDC) ever associated with a concept.
RxNorm identifier of a drug product (term type SBD, SCD, BPCK, or GPCK)
NDCs presently directly associated
NDCs ever directly associated
NDCs ever (in)directly associated