ICD-O

E22272

disease coding system medical classification oncology classification system

ICD-O (International Classification of Diseases for Oncology) is a specialized coding system used worldwide for classifying tumors by site, morphology, behavior, and grade in cancer registration and research.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (7)

Label	Occurrences
ICD-O canonical	2
ICD-O-3.2	2
ICD-O-1	1
ICD-O-2	1
ICD-O-3	1
ICD-O-3.1	1
International Classification of Diseases for Oncology	1

How this entity was disambiguated

This entity first appeared as the object of triple T154011 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: ICD-O
Context triple: [International Classification of Diseases, relatedTo, ICD-O]

A. International Classification of Diseases
The International Classification of Diseases is a globally used diagnostic system that standardizes codes for diseases, health conditions, and related medical problems to support clinical care, research, and health statistics.
B. SNOMED CT
SNOMED CT is a comprehensive, multilingual clinical healthcare terminology used worldwide to standardize the recording and sharing of medical information in electronic health records.
C. International Classification of Health Interventions
The International Classification of Health Interventions is a standardized global system developed by the World Health Organization to categorize and code medical and health-related procedures and interventions for use in clinical practice, research, and health statistics.
D. International Classification of Primary Care
The International Classification of Primary Care is a standardized system used worldwide to code and organize data on patient reasons for encounter, diagnoses, and primary care processes in general practice settings.
E. Division of Cancer Treatment and Diagnosis
The Division of Cancer Treatment and Diagnosis is a branch of the National Cancer Institute that supports the development, evaluation, and clinical testing of new cancer therapies and diagnostic tools.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: ICD-O
Target entity description: ICD-O (International Classification of Diseases for Oncology) is a specialized coding system used worldwide for classifying tumors by site, morphology, behavior, and grade in cancer registration and research.

A. International Classification of Diseases
The International Classification of Diseases is a globally used diagnostic system that standardizes codes for diseases, health conditions, and related medical problems to support clinical care, research, and health statistics.
B. SNOMED CT
SNOMED CT is a comprehensive, multilingual clinical healthcare terminology used worldwide to standardize the recording and sharing of medical information in electronic health records.
C. International Classification of Health Interventions
The International Classification of Health Interventions is a standardized global system developed by the World Health Organization to categorize and code medical and health-related procedures and interventions for use in clinical practice, research, and health statistics.
D. International Classification of Primary Care
The International Classification of Primary Care is a standardized system used worldwide to code and organize data on patient reasons for encounter, diagnoses, and primary care processes in general practice settings.
E. Division of Cancer Treatment and Diagnosis
The Division of Cancer Treatment and Diagnosis is a branch of the National Cancer Institute that supports the development, evaluation, and clinical testing of new cancer therapies and diagnostic tools.
F. None of above. chosen

Statements (52)

Predicate	Object
instanceOf	disease coding system ⓘ medical classification ⓘ oncology classification system ⓘ
abbreviation	ICD-O self-link ⓘ
codeStructure	alphanumeric topography codes ⓘ numeric morphology codes ⓘ
component	behavior code ⓘ grade code ⓘ morphology code ⓘ topography code ⓘ
edition	ICD-O self-linksurface differs ⓘ surface form: ICD-O-1 ICD-O self-linksurface differs ⓘ surface form: ICD-O-2 ICD-O self-linksurface differs ⓘ surface form: ICD-O-3 ICD-O self-linksurface differs ⓘ surface form: ICD-O-3.1 ICD-O self-linksurface differs ⓘ surface form: ICD-O-3.2
field	cancer epidemiology ⓘ cancer registration ⓘ cancer research ⓘ oncology ⓘ
fullName	ICD-O self-linksurface differs ⓘ surface form: International Classification of Diseases for Oncology
geographicUse	worldwide ⓘ
language	English ⓘ
latestEdition	ICD-O self-linksurface differs ⓘ surface form: ICD-O-3.2
maintainedBy	World Health Organization ⓘ
primaryPurpose	standardized coding of neoplasms for registration and research ⓘ
publisher	World Health Organization ⓘ
relatedTo	International Classification of Diseases ⓘ surface form: ICD International Classification of Diseases ⓘ
scope	cancers ⓘ neoplasms ⓘ tumors ⓘ
topographyBasedOn	International Classification of Diseases ⓘ surface form: ICD-10 International Classification of Diseases ⓘ
usedBy	cancer registrars ⓘ epidemiologists ⓘ pathologists ⓘ public health agencies ⓘ
usedFor	classifying tumors by behavior ⓘ classifying tumors by grade ⓘ classifying tumors by morphology ⓘ classifying tumors by topography ⓘ coding histology of tumors ⓘ coding primary site of tumors ⓘ coding tumor behavior ⓘ coding tumor grade ⓘ international comparison of cancer statistics ⓘ linking cancer registry data with pathology reports ⓘ standardizing cancer incidence data ⓘ
usedIn	cancer registries ⓘ cancer research databases ⓘ hospital-based cancer registries ⓘ population-based cancer registries ⓘ

How these facts were elicited

Referenced by (9)

Full triples — surface form annotated when it differs from this entity's canonical label.

International Classification of Diseases → relatedTo → ICD-O ⓘ

ICD-O → fullName → ICD-O self-linksurface differs ⓘ

this entity surface form: International Classification of Diseases for Oncology

ICD-O → abbreviation → ICD-O self-link ⓘ