OID Reference
Quick reference guide for Object Identifiers (OIDs) commonly used in C-CDA documents.
What is an OID?
An Object Identifier (OID) is a globally unique identifier used in HL7 standards to identify templates, code systems, and other healthcare data elements. OIDs follow the ISO/ITU-T standard format (e.g., 2.16.840.1.113883.10.20.22.1.1).
Document Type OIDs
C-CDA R2.1 Document Templates
| Document Type |
OID |
Template ID |
| US Realm Header |
2.16.840.1.113883.10.20.22.1.1 |
2015-08-01 |
| Continuity of Care Document (CCD) |
2.16.840.1.113883.10.20.22.1.2 |
2015-08-01 |
| Consultation Note |
2.16.840.1.113883.10.20.22.1.4 |
2015-08-01 |
| Discharge Summary |
2.16.840.1.113883.10.20.22.1.8 |
2015-08-01 |
| History and Physical |
2.16.840.1.113883.10.20.22.1.3 |
2015-08-01 |
| Progress Note |
2.16.840.1.113883.10.20.22.1.9 |
2015-08-01 |
| Procedure Note |
2.16.840.1.113883.10.20.22.1.6 |
2015-08-01 |
| Operative Note |
2.16.840.1.113883.10.20.22.1.7 |
2015-08-01 |
| Care Plan |
2.16.840.1.113883.10.20.22.1.15 |
2015-08-01 |
| Transfer Summary |
2.16.840.1.113883.10.20.22.1.13 |
2015-08-01 |
| Referral Note |
2.16.840.1.113883.10.20.22.1.14 |
2015-08-01 |
| Unstructured Document |
2.16.840.1.113883.10.20.22.1.10 |
2015-08-01 |
Section Template OIDs
All 29 C-CDA R2.1 Sections
| Section Name |
OID |
Template ID |
| Advance Directives Section |
2.16.840.1.113883.10.20.22.2.21 |
2015-08-01 |
| Allergies and Intolerances Section |
2.16.840.1.113883.10.20.22.2.6.1 |
2015-08-01 |
| Assessment Section |
2.16.840.1.113883.10.20.22.2.8 |
2014-06-09 |
| Assessment and Plan Section |
2.16.840.1.113883.10.20.22.2.9 |
2014-06-09 |
| Chief Complaint Section |
2.16.840.1.113883.10.20.22.2.13 |
2014-06-09 |
| Chief Complaint and Reason for Visit Section |
2.16.840.1.113883.10.20.22.2.13 |
2014-06-09 |
| Encounters Section |
2.16.840.1.113883.10.20.22.2.22.1 |
2015-08-01 |
| Family History Section |
2.16.840.1.113883.10.20.22.2.15 |
2015-08-01 |
| Functional Status Section |
2.16.840.1.113883.10.20.22.2.14 |
2014-06-09 |
| General Status Section |
2.16.840.1.113883.10.20.22.2.45 |
2015-08-01 |
| Goals Section |
2.16.840.1.113883.10.20.22.2.60 |
2015-08-01 |
| Health Concerns Section |
2.16.840.1.113883.10.20.22.2.58 |
2015-08-01 |
| History of Past Illness Section |
2.16.840.1.113883.10.20.22.2.20 |
2015-08-01 |
| History of Present Illness Section |
2.16.840.1.113883.10.20.22.2.33 |
2015-08-01 |
| Immunizations Section |
2.16.840.1.113883.10.20.22.2.2.1 |
2015-08-01 |
| Instructions Section |
2.16.840.1.113883.10.20.22.2.45 |
2014-06-09 |
| Interventions Section |
2.16.840.1.113883.10.20.21.2.3 |
2015-08-01 |
| Medical Equipment Section |
2.16.840.1.113883.10.20.22.2.23 |
2014-06-09 |
| Medications Section |
2.16.840.1.113883.10.20.22.2.1.1 |
2014-06-09 |
| Mental Status Section |
2.16.840.1.113883.10.20.22.2.56 |
2015-08-01 |
| Nutrition Section |
2.16.840.1.113883.10.20.22.2.57 |
2015-08-01 |
| Payers Section |
2.16.840.1.113883.10.20.22.2.18 |
2015-08-01 |
| Physical Exam Section |
2.16.840.1.113883.10.20.2.10 |
2015-08-01 |
| Plan of Treatment Section |
2.16.840.1.113883.10.20.22.2.10 |
2014-06-09 |
| Problem Section |
2.16.840.1.113883.10.20.22.2.5.1 |
2015-08-01 |
| Procedures Section |
2.16.840.1.113883.10.20.22.2.7.1 |
2014-06-09 |
| Reason for Visit Section |
2.16.840.1.113883.10.20.22.2.12 |
2014-06-09 |
| Results Section |
2.16.840.1.113883.10.20.22.2.3.1 |
2015-08-01 |
| Review of Systems Section |
2.16.840.1.113883.10.20.22.2.40 |
2015-08-01 |
| Social History Section |
2.16.840.1.113883.10.20.22.2.17 |
2015-08-01 |
| Vital Signs Section |
2.16.840.1.113883.10.20.22.2.4.1 |
2015-08-01 |
Code System OIDs
Standard Terminologies
| Code System |
OID |
Usage |
| SNOMED CT |
2.16.840.1.113883.6.96 |
Clinical terms, problems, procedures |
| LOINC |
2.16.840.1.113883.6.1 |
Lab results, document types, vital signs |
| RxNorm |
2.16.840.1.113883.6.88 |
Medications and drugs |
| CPT-4 |
2.16.840.1.113883.6.12 |
Procedures and services |
| ICD-10-CM |
2.16.840.1.113883.6.90 |
Diagnosis codes |
| ICD-10-PCS |
2.16.840.1.113883.6.4 |
Procedure codes |
| ICD-9-CM |
2.16.840.1.113883.6.103 |
Legacy diagnosis codes |
| CVX |
2.16.840.1.113883.12.292 |
Vaccine codes |
| NDC |
2.16.840.1.113883.6.69 |
National Drug Codes |
| UCUM |
2.16.840.1.113883.6.8 |
Units of measure |
| NCI Thesaurus |
2.16.840.1.113883.3.26.1.1 |
Cancer and research terms |
| HL7 ActCode |
2.16.840.1.113883.5.4 |
HL7-defined act codes |
| HL7 RoleCode |
2.16.840.1.113883.5.111 |
HL7-defined role codes |
| HL7 ParticipationType |
2.16.840.1.113883.5.90 |
Participation types |
| HL7 AdministrativeGender |
2.16.840.1.113883.5.1 |
Gender codes |
| HL7 MaritalStatus |
2.16.840.1.113883.5.2 |
Marital status codes |
| HL7 RaceCategory |
2.16.840.1.113883.6.238 |
Race and ethnicity |
| HL7 NullFlavor |
2.16.840.1.113883.5.1008 |
Null/missing value reasons |
Entry Template OIDs
Common Entry Templates
| Entry Template |
OID |
Template ID |
| Allergy Intolerance Observation |
2.16.840.1.113883.10.20.22.4.7 |
2014-06-09 |
| Medication Activity |
2.16.840.1.113883.10.20.22.4.16 |
2014-06-09 |
| Problem Observation |
2.16.840.1.113883.10.20.22.4.4 |
2015-08-01 |
| Procedure Activity |
2.16.840.1.113883.10.20.22.4.14 |
2014-06-09 |
| Result Observation |
2.16.840.1.113883.10.20.22.4.2 |
2015-08-01 |
| Vital Sign Observation |
2.16.840.1.113883.10.20.22.4.27 |
2014-06-09 |
| Immunization Activity |
2.16.840.1.113883.10.20.22.4.52 |
2015-08-01 |
| Encounter Activity |
2.16.840.1.113883.10.20.22.4.49 |
2015-08-01 |
| Social History Observation |
2.16.840.1.113883.10.20.22.4.38 |
2014-06-09 |
| Family History Observation |
2.16.840.1.113883.10.20.22.4.46 |
2015-08-01 |
Value Set OIDs
Commonly Used Value Sets
| Value Set |
OID |
Purpose |
| Problem Type |
2.16.840.1.113883.3.88.12.3221.7.2 |
Classify problem types |
| Allergy/Adverse Event Type |
2.16.840.1.113883.3.88.12.3221.6.2 |
Allergy classification |
| Medication Route FDA |
2.16.840.1.113883.3.88.12.3221.8.7 |
Drug administration routes |
| Body Site Value Set |
2.16.840.1.113883.3.88.12.3221.8.9 |
Anatomical locations |
| Problem Severity |
2.16.840.1.113883.3.88.12.3221.6.8 |
Problem severity levels |
| Vital Sign Result Type |
2.16.840.1.113883.3.88.12.80.62 |
Types of vital signs |
Organization and Provider OIDs
Identity System OIDs
| System |
OID |
Usage |
| NPI (National Provider Identifier) |
2.16.840.1.113883.4.6 |
Provider identification |
| TIN (Tax ID Number) |
2.16.840.1.113883.4.2 |
Organization identification |
| SSN (Social Security Number) |
2.16.840.1.113883.4.1 |
Patient identification (avoid) |
| State License |
2.16.840.1.113883.4.3.{state} |
State-issued IDs |
| DEA Number |
2.16.840.1.113883.4.814 |
Drug prescriber ID |
Using OIDs in ccdakit
In Python Code
from ccdakit.models.sections import AllergiesSection
# OID is automatically included when building sections
section = AllergiesSection()
# The template OID 2.16.840.1.113883.10.20.22.2.6.1 is added automatically
# For code systems in observations
from ccdakit.models.datatypes import CD
code = CD(
code="1234567",
code_system="2.16.840.1.113883.6.96", # SNOMED CT OID
display_name="Example Finding"
)
Verifying OIDs
When validating C-CDA documents, validators check that:
- Template OIDs match declared conformance level
- Template IDs (dates) are correct for the version
- Code system OIDs are valid and appropriate for the context
- Referenced value sets are from approved OIDs
Quick Lookup Tips
- Document Level: Always starts with
2.16.840.1.113883.10.20.22.1.x
- Section Level: Usually
2.16.840.1.113883.10.20.22.2.x
- Entry Level: Usually
2.16.840.1.113883.10.20.22.4.x
- Code Systems: All start with
2.16.840.1.113883.6.x
- HL7 Vocabulary:
2.16.840.1.113883.5.x for HL7 tables
Additional Resources
Notes
- OIDs must be globally unique
- Never create your own OIDs for standard elements
- Template IDs (dates) indicate the version of the template
- Code system OIDs are stable, but value sets can evolve
- Always use official OIDs from HL7 specifications