Patient
(0010,0021)
Issuer of Patient ID
Keyword: IssuerOfPatientID
Identifier of the Assigning Authority that issued the Patient ID. Used in multi-domain environments.
Tag Attributes
- Tag ID
- (0010,0021)
- Compact
- 00100021
- Keyword
- IssuerOfPatientID
- VR
- LO — Long String
- VM
- 1
- Retired
- No
Module(s)
Patient Module
Engineering Notes
Essential for multi-site deployments where the same MRN number could exist across facilities. Without Issuer, patient matching is ambiguous.
Troubleshooting
In federated or multi-site PACS, always populate Issuer of Patient ID to prevent cross-site patient ID collisions.