RxNorm
RxNorm is the US normalized naming system for clinical drugs, providing standard identifiers that let different medication vocabularies interoperate.
RxNorm is a normalized drug-naming system maintained by the US National Library of Medicine. It provides standard names and identifiers (RxCUIs) for clinical drugs and links them to the many proprietary and commercial vocabularies that pharmacies, EHRs, and drug-knowledge vendors use.
RxNorm operates at the level of the clinical drug concept — the ingredient, strength, and dose form — which makes it ideal for prescribing, medication reconciliation, and clinical decision support. It is the connective tissue that lets two systems agree they are talking about the same medication.
RxNorm is frequently crosswalked with NDC (National Drug Code) for the dispensing and billing side, where package- and manufacturer-level granularity matters.
How this relates to Health1st
Health1st's Terminology Agent crosswalks RxNorm ↔ NDC and normalizes local medication codes with confidence scoring, so medication data survives translation between EHR, SCRIPT, and FHIR without losing meaning.
Related terms
The NDC is the FDA identifier for a specific drug product at the package level — identifying manufacturer, product, and package size for dispensing and billing.
NCPDP SCRIPT is the national standard for electronic prescribing transactions between prescribers and pharmacies.
RTPB surfaces patient-specific drug coverage and out-of-pocket cost inside the prescribing workflow, so clinicians can pick affordable, covered medications at the point of care.
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