National Library of Medicine, National Institutes of Health, Bethesda, MD 20894, United States.
National Health Services, Leeds, United Kingdom.
J Am Med Inform Assoc. 2024 Aug 1;31(8):1631-1637. doi: 10.1093/jamia/ocae143.
To explore the feasibility and challenges of mapping between SNOMED CT and the ICD-11 Foundation in both directions, SNOMED International and the World Health Organization conducted a pilot mapping project between September 2021 and August 2022.
Phase 1 mapped ICD-11 Foundation entities from the endocrine diseases chapter, excluding malignant neoplasms, to SNOMED CT. In phase 2, SNOMED CT concepts equivalent to those covered by the ICD-11 entities in phase 1 were mapped to the ICD-11 Foundation. The goal was to identify equivalence between an ICD-11 Foundation entity and a SNOMED CT concept. Postcoordination was used for mapping to ICD-11. Each map was done twice independently, the results were compared, and discrepancies were reconciled.
In phase 1, 59% of 637 ICD-11 Foundation entities had an exact match in SNOMED CT. In phase 2, 32% of 1893 SNOMED CT concepts had an exact match in the ICD-11 Foundation, and postcoordination added 15% of exact match. Challenges encountered included non-synonymous synonyms, mismatch in granularity, composite conditions, and residual categories.
This pilot project shed light on the tremendous amount of effort required to create a map between the 2 coding systems and uncovered some common challenges. Future collaborative work between SNOMED International and WHO will likely benefit from its findings. It is recommended that the 2 organizations should clarify goals and use cases of mapping, provide adequate resources, set up a road map, and reconsider their original proposal of incorporating SNOMED CT into the ICD-11 Foundation ontology.
探索在双向（SNOMED International 和世界卫生组织）对 SNOMED CT 与 ICD-11 基础进行映射的可行性和挑战。为此，SNOMED International 和世界卫生组织于 2021 年 9 月至 2022 年 8 月开展了一项试点映射项目。
第 1 阶段将不包括恶性肿瘤的内分泌疾病章节的 ICD-11 基础实体映射到 SNOMED CT。在第 2 阶段，将与第 1 阶段涵盖的 ICD-11 实体相对应的 SNOMED CT 概念映射到 ICD-11 基础。目标是确定 ICD-11 基础实体与 SNOMED CT 概念之间的等价性。后协调用于映射到 ICD-11。每个映射都独立进行了两次，比较了结果，并解决了差异。
在第 1 阶段，637 个 ICD-11 基础实体中有 59%在 SNOMED CT 中有精确匹配。在第 2 阶段，1893 个 SNOMED CT 概念中有 32%在 ICD-11 基础中有精确匹配，后协调增加了 15%的精确匹配。遇到的挑战包括非同义词、粒度不匹配、复合条件和剩余类别。
该试点项目揭示了创建这两个编码系统之间映射所需的大量工作，并发现了一些共同的挑战。SNOMED International 和世界卫生组织未来的合作工作可能会受益于其研究结果。建议这两个组织应明确映射的目标和用例，提供足够的资源，制定路线图，并重新考虑将 SNOMED CT 纳入 ICD-11 基础本体的原始提议。
