The NDF-RT API will be decommissioned on January 2, 2019
  • RxNav

    RxNav is a browser for several drug information sources, including RxNorm and RxTerms. RxNav finds drugs in RxNorm from the names and codes in its constituent vocabularies.

    rxnav formview image rxnav simplified image pill image status view atc class view
  • APIs

    Application Program Interfaces (APIs) are available to users to retrieve data from several drug information sources, including RxNorm and RxTerms.

    Currently there are seven APIs available - RxNorm, Prescribable RxNorm, RxClass, NDF-RT, RxTerms, RxCUI History and Drug Interaction

    Other API graph Aug 2015 rxnormapi call function April 2018
  • RxMix

    RxMix is a web application that allows users to combine functions from eight different APIs to create custom applications that can be run interactively or in a batch mode.

    rxmix flow image rxmix output image
  • RxClass

    The RxClass Browser is a web application for exploring and navigating through the class hierarchies to find the RxNorm drug members associated with each class.

    rxclass browser image rxclass selection image rxclass Venn diagram

RxNav brand names


RxNav-in-a-Box provides users with a locally-installable version of RxNav and companion RESTful APIs, including RxNorm, RxTerms, RxClass and drug-drug interactions. A beta version is now available for users to download. Details

Video Tutorials



New Class Type in RxClass

Therapeutic Categories (TC) class type has been added to RxClass and the RxClass API. Therapeutic Categories is a small, experimental collection of general therapeutic intents of drug generic ingredients, organized into an organ system-oriented classification hierarchy. API example

VA Class Id Change

The VA Class identifiers in RxClass have been changed from the NDF-RT unique identifiers (NUIs) to the 5-digit VA class ids. Example

New Fields in ndcstatus

Several new fields have been added to the RESTful resource ndcstatus in the RxNorm API to provide more information about the National Drug Codes (NDCs).

API Usage RxNorm (September 2018) Other APIs (September 2018)
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