Recent Articles

Representing an unknown NPI number

May 15th, 2014|0 Comments

The article Identifiers in CDA presents an overview of how identifiers are represented in the XML syntax of CDA documents. It describes the two primary attributes of identifier XML elements: root and extension.

The article The […]

The id element

May 15th, 2014|0 Comments

Many of the XML elements in a CDA document have a sub-element named id.

The id Element Contains a Unique Identifier for its Parent Object/Item
The id element is generally used to provide an internal unique identifier […]


March 17th, 2014|0 Comments

Refer to the articles OIDs and GUIDs and UUIDs, for an introduction and overview of these two types of unique identifiers that are prevalent in CDA documents.

This article discusses the relative merits of each type […]


March 17th, 2014|0 Comments

In CDA documents, there are primarily two types of identifiers that are used – OIDs and GUIDs/UUIDs. Most of the articles in CDA PRO Know related to identifiers focus on OIDs – as OIDs are […]

How should we manage our OIDs?

March 13th, 2014|0 Comments

The article OIDs, introduces and overviews the concept of OIDs (object identifiers) that are very prevalent in CDA documents. It is recommended that readers of this article first be familiar with that material.

Every Organization is […]

Unique Device Identification (UDI) in C-CDA

March 4th, 2014|0 Comments

Unique Device Identification (UDI) is a standard of the US Food and Drug Administration (FDA) for associating and displaying unique identifiers on medical devices.
In C-CDA, there is an explicit reference to UDI in […]


February 6th, 2014|0 Comments

A fundamental need throughout a CDA document is the ability to use unique identifiers.

The preferred form of identifier in all HL7 standards is something called an Object Identifier, which is commonly abbreviated OID. In CDA, […]

Identifiers in CDA

February 6th, 2014|0 Comments

Identifiers are used throughout CDA documents to uniquely identify people, places, and things.

Some identifiers are created by HL7 for use in CDA documents and related standards. These identifiers generally use OIDs. Examples of such identifiers […]