OID Registration

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IHE maintains a namespace under an object identifier (OID) obtained from the IANA. The structure of the root OID ( is described below:

1 = International Organization for Standardization (ISO)
3 = Organization identification schemes registered according to ISO/IEC 6523-2
6 = United States Department of Defense (DoD)
1 = Internet
4 = Internet Assigned Numbers Authority (IANA)
1 = Private enterprises
19376 = Integrating the Healthcare Enterprise International

Top-level OIDs under this namespace are assigned and registered by the IHE Documentation Specialist. Send inquiries about assignment of top-level domains to:

IHE Domain Namespaces

Each IHE domain manages its own subdomain under the root OID for IHE domain namespaces ( The root OID for each domain is provided below, along with a link to a page describing its OID assignments.

Domain Top-level OID
Anatomic Pathology (ANAPATH)

Cardiology(CARD) Dental (DENT) Endoscopy (ENDO) Eye Care (EYECARE) IT Infrastructure(ITI) Laboratory(LAB) Pathology and Laboratory Medicine (PaLM) "Patient Care Coordination (PCC)

" Patient Care Device (PCD) Pharmacy(PHARM) Quality, Research and Public Health (QRPH) Radiation Oncology (RO) Radiology (RAD)