ICD-O-3
Pronunciation: I-C-D-O-three
Also written as: ICD-O-3 — International Classification of Diseases for Oncology, Third Edition
International Classification of Diseases for Oncology, Third Edition - the standard for coding cancer diagnoses and morphology.
Full Definition
The International Classification of Diseases for Oncology, Third Edition (ICD-O-3) is a domain-specific extension of the International Statistical Classification of Diseases and Related Health Problems for tumor diseases. ICD-O-3 provides codes for both the topography (anatomic site) and morphology (histologic type) of neoplasms. The classification is essential for cancer registry operations, epidemiological studies, and health services research. In oncology informatics, ICD-O-3 codes must be accurately assigned, validated, and mapped to other coding systems for data exchange and analysis purposes.
Usage
Usage note: Always include the '3' to specify the third edition. Write as 'ICD-O-3' with hyphens, not 'ICDO3' or 'ICD O 3'.
In Context
- "The adenocarcinoma was coded as 8140/3 in ICD-O-3 morphology classification." — Pathology report coding
- "Data quality checks identified discrepancies between ICD-O-3 site and behavior codes." — Registry quality control procedures