---
id: "icd_o"
kind: "datatype"
status: "draft"
is_pii: false
categories: ["medical"]
langs: ["common"]
quality: 80
url: "http://registry.apicrafter.io/datatype/icd_o"
---

# ICD-O morphology code (`icd_o`)

> **Draft.** Draft records have not been reviewed yet and may be incomplete or wrong; do not treat them as authoritative for legal or compliance decisions.

Code of a tumour type in the International Classification of Diseases for Oncology: four digits for the histology and a behaviour digit after a slash, such as 8140/3 for adenocarcinoma. The code is sometimes written with the prefix M.

- Personal data (PII): no
- Categories: Medical/pharma identifiers (medical)
- Countries: global
- Languages: Common to most languages (common)
- Classification: categorical

## Detection

Regular expression (Python `re`):

```
^M?[89]\d{3}(?:/[0-3])?$
```

## Examples

- `8561/0` — Warthin's tumor
- `M9860/3` — myeloid leukemia

## Mappings

- bioregistry: `icdo`
- wikidata: `P563`

## Sources

- wikipedia: <https://en.wikipedia.org/wiki/International_Classification_of_Diseases_for_Oncology>
- wikidata: <https://www.wikidata.org/wiki/Property:P563>

## Quality

Score 80/100. Missing: negative example, translation, detector coverage.

JSON: <http://registry.apicrafter.io/api/v1/datatypes/icd_o.json> · Edit: <https://github.com/apicrafter/metacrafter-registry/edit/main/data/datatypes/any/medical/icd_o.yaml>