# mCODE (minimal Common Oncology Data Elements)

Source: https://onco.cc/terms/mcode/  
OnCo record `mcode` (Term). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

A standard checklist of cancer data every electronic record should capture the same way, so data can flow between hospitals, registries, and research.

## Summary

mCODE, the minimal Common Oncology Data Elements, is a standard checklist of cancer data that every electronic record should capture in the same way, so information can flow between hospitals, registries and research. Technically it is an HL7 FHIR implementation guide developed by ASCO, MITRE and CodeX, covering diagnosis, staging, biomarkers, treatment and outcomes. It has been adopted by EHR vendors and is required in some CMS and FDA pilots. The term is linked to the Oncology EHR modules and treatment pathways and Oncology EHR and real-world data platforms technologies, both of which reference it, and it underpins the cost idea of answering prior authorisation requests in seconds from the medical record, which depends on structured oncology data being available in FHIR form.

## Fields

- Kind: Term
- Last checked: 2026-09-08

## Sources

- mCODE: https://hl7.org/fhir/us/mcode/

## Connected records

- technologies: [Oncology EHR and real-world data platforms](https://onco.cc/technologies/oncology-real-world-data/), [Oncology EHR modules and treatment pathways](https://onco.cc/technologies/hospital-information-systems-oncology/)
- ideas: [Answer prior authorisation requests in seconds from the medical record](https://onco.cc/ideas/idea-cost-real-time-pa-fhir/)

---
JSON: https://onco.cc/api/v1/entities/mcode.json