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Table 1 The topics of extension codes in ICD-11-MMS, with examples

From: ICD-11: an international classification of diseases for the twenty-first century

Topics

Types and examples

Severity scale value

None, mild, moderate…. Grade 0/1/2…

Temporality

Course of the condition. Time in life. Pregnancy duration

Aetiology

Causation. Infectious agents. Allergens

Topology scale value

Relational. Distributional. Laterality. Regional

Anatomy and topography

Functional anatomy. Body regions. Partonomic view

Histopathology

Gliomas: benign, malignant, uncertain, in situ

Dimensions of injury

Types of fractures and whether open or into a joint

Dimensions of external causes

Type and part of place. Activity. Objects. Alcohol and drugs

Consciousness

Components of Glasgow Coma Scale. Pupil reaction

Substances

Medicaments (e.g., oxycodone). Chemicals (e.g., parathion)

Diagnosis code descriptors

Diagnosis timing/certainty/method of confirmation

Capacity or context

Condition of fetus/newborn reported in context of the mother

Health devices, equipment, and supplies

Medical devices, surgical instruments, dialysis supplies