| Code | Display | Definition |
| UDI | Universal Device Identifier | A identifier assigned to a device using the Universal Device Identifier framework as defined by FDA (http://www.fda.gov/MedicalDevices/DeviceRegulationandGuidance/UniqueDeviceIdentification/). |
| SNO | Serial Number | An identifier affixed to an item by the manufacturer when it is first made, where each item has a different identifier. |
| SB | Social Beneficiary Identifier | An identifier issued by a governmental organization to an individual for the purpose of the receipt of social services and benefits. |
| PLAC | Placer Identifier | The identifier associated with the person or service that requests or places an order. |
| FILL | Filler Identifier | The Identifier associated with the person, or service, who produces the observations or fulfills the order requested by the requestor. |
