Dose syntax implementation guidance for FHIR STU3

This guidance is under active development by NHS Digital and content may be added or updated on a regular basis.

Units of Measure

A unit of measure is required when describing a dosage and can be supplied via one of the following:

The Unified Code for Units of Measure (UCUM)

The Unified Code for Units of Measure (UCUM) is preferred and should be used where possible.

Examples of when a UCUM unit of measure would be used are:

  • gram (g)
  • milliliter (ml)
  • percent (%)
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