RxCUI History RESTful API


THIS API WAS DEPRECATED IN JULY 2020 and removed in January 2021. See /historystatus and /allconceptsbystatus resources in the RxNorm API for replacement resources.

The RxCUI History RESTful web API is a web service developed at the National Library of Medicine for accessing RxNorm concept history data. Representational state transfer (REST) is a style of software architecture for distributed hypermedia systems such as the World Wide Web. REST-style architectures consist of clients and servers. Clients initiate requests to servers; servers process requests and return appropriate responses. Requests and responses are built around the transfer of "representations" of "resources". A resource can be essentially any coherent and meaningful concept that may be addressed. A representation of a resource is typically a document that captures the current or intended state of a resource.

The RxCUI History RESTful web API is a simple web service implemented using HTTP and can be thought of as a collection of resources, specified as URIs. Some characteristics of the RxCUI History RESTful web API:
The following table lists the RxCUI History API resources. The query string fields are described in the detailed sections for each resource.


REST Resource Description
/concept Deprecated July 2020. Get the history information for an RxNorm concept (specified by RxCUI)
/status Deprecated July 2020. Get the concepts of a specified status