MeSH 2026 Update: Replaced Medical Subject Headings from 2023-2026

The MeSH 2026 Update - Replace Report lists where existing Medical Subject Headings terms have been replaced by others, including changes from 2023 onward. It is published by datadiscovery.nlm.nih.gov and was last updated on February 10, 2026. The dataset includes 11 columns tracking the replacement details for Descriptors and Supplementary Concept Records.

Use Cases

• Track vocabulary evolution by analyzing REPLACED_NAME, REPLACEMENT_NAME, and Year columns.
• Map legacy terms to current ones using REPLACED_UI and REPLACEMENT_OPTION_UI for data integration.
• Identify newly introduced terms versus consolidations using the IS_NEW and REPLACEMENT_REC_CLASS columns.
• Understand the rationale for term changes by reviewing the NOTE column (from 11 available columns).

Strengths

• Covers a multi-year update period from 2023 to 2026.
• Provides 11 detailed columns for tracking term replacement metadata.
• Published by the authoritative National Library of Medicine (NLM) via its datadiscovery platform.

Limitations

• Row count is unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

datadiscovery.nlm.nih.gov

Collection Method

Official vocabulary update report from the National Library of Medicine.

Time Range

Covers changes from 2023 to 2026.

Freshness

Last updated 2026-02-10 20:39:19.