Prescribable RxNorm API


Information returned
A property of a concept
Service domain
HTTP request
GET  /REST/Prescribe/rxcui/rxcui/property.xml?propName=propName


Get the value(s) of property propName of the RxNorm concept identified by rxcui.

Results include a category for each property. See getPropNames for the properties and their respective category.


Active: concepts in the current RxNorm data set that have an atom with SAB=RXNORM and SUPPRESS=N


rxcuiPathRequiredRxNorm identifier

Notation for results

One of:
Get results in XML
Get results in JSON
propNameQueryRequiredProperty name

(See getPropNames for the menu.)

All query parameters are case-insensitive.

Note that HTTP requires that query parameters be "URL encoded". For full information on URL encoding, please refer to IETF RFC 3986, "Uniform Resource Identifier".

Output structure

Results are available as either XML or JSON.

  • The XML result has the root element rxnormdata. It is described in the XML Schema for the Prescribable RxNorm API; the relevant element structure is summarized below. Elements that would be empty might be left out.

  • The JSON result is an object {...}, analogous to the content of the XML rxnormdata. Fields that might occur multiple times in the XML are expressed as an array. Fields that would be empty might be null or left out. Numbers are expressed as strings.

Both XML and JSON results follow the same outline:

Root element in XML, or anonymous object in JSON
Collection of properties
propConcept (array)
One property name and value. Repeated for additional values
RxNav category that includes the property
Property name
Value of the property

Example: UNII_CODE identifier for morphine (RxCUI=7052)

XML: https://rxnav.nlm.nih.gov/REST/Prescribe/rxcui/7052/property?propName=UNII_CODE

JSON: https://rxnav.nlm.nih.gov/REST/Prescribe/rxcui/7052/property.json?propName=UNII_CODE

An XML result is shown below.