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The international edition of ICD-O-3, published in English by the World Health Organization. It is the English reference edition for cancer registries. Around 1,600 codes across two axes: topography (C-codes) and morphology (M-codes).

Quick start

System identifier: icdo3int
SDK examples will follow once the JavaScript and .NET SDKs support ICD-O-3. Use the REST API directly in the meantime.
API reference →

Dual-axis coding

Every tumor is returned as a paired topography code (anatomical site, e.g., C18.2) and morphology code (histological type and behavior, e.g., 8480/3). See the ICD-O-3 overview for the behavior suffixes.

Language support

The international edition works best in English. No translation step is required; the model processes the input text directly.