Abstract
Effective coding is key to the development and use of the WHO Essential Diagnostics List
Highlights
The WHO new Essential Diagnostics List (EDL) aims to provide a structure for identifying, promoting, and increasing the supply and availability of the most effective and important in-vitro diagnostics
The diversity of these applications can result in multiple coding systems being implemented in different clinical information technology (IT) systems even within the same health-care institution, which can add to complexity and increase the difficulty of linked data analysis
The EDL is expected to have a substantial effect on the availability of the most important diagnostics in lowincome and middle-income countries (LMICs) because it provides an evidence-based template to guide government purchasing, while directing scarce resources towards the most important tests
Summary
The WHO new Essential Diagnostics List (EDL) aims to provide a structure for identifying, promoting, and increasing the supply and availability of the most effective and important in-vitro diagnostics (a full list of the included diagnostics is available in the appendix). In high-income countries, coding systems such as SNOMED CT, ICD11, and Logical Observation Identifiers Names and Codes (LOINC) together provide precise clinical vocabularies that allow medics to very describe medical conditions and treatments in electronic health record systems.
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