Identifier Systems

Identifier Systems are composed of strings (typically numeric or alphanumeric) that have a common purpose and/or context. They are primarily used to uniquely identify individual entities (patients, organizations, devices, documents, etc.). Each identifier value is unique within the Identifier System. Identifier System values have no inherent meaning without its system context.

Patient IDs, lab order numbers, device serial numbers, and claim IDs are examples of local Identifier Systems, defined and managed within a single organization. Systems such as the Global Trade Item Number (GTIN), US state driver’s license numbers, and country passport numbers are examples of jurisdictional Identifier Systems, issued by recognized authorities for use across organizations.