International Classification of Diseases, Tenth Revision (ICD 10)

Why it matters

Most national health returns, mortality reports and many insurance schemes still rely on ICD 10 codes. A clinical system that cannot code in ICD 10 cannot feed national reporting, and a system that codes only in ICD 10 will need replacing when the ministry moves to ICD 11.

Key points

• WHO stopped maintaining ICD 10 in 2018; future enhancements are made only in ICD 11 [1].
• Countries can continue to use ICD 10 for as long as necessary, although WHO encourages prompt adoption of ICD 11 [1].
• WHO publishes mapping tables to compare data across revisions, but states that they are not intended for directly converting data [1].
• ICD 11 came into effect on 1 January 2022 [2], so many ministries are now planning a transition period in which both revisions are in use.
• The practical requirement for procurement is a system that supports both revisions, so the transition does not require another purchase.

In Moana

Moana codes diagnoses in ICD 10 and ICD 11, so facilities can report in the revision their ministry uses today and move to ICD 11 without changing system.

Sources

1. ICD 11 implementation, frequently asked questions, World Health Organization, accessed 2026
2. The 72nd World Health Assembly resolution for ICD 11 adoption, World Health Organization, 2019