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ATC Classification (Anatomical Therapeutic Chemical)

Code System Pharma specification sold

The Anatomical Therapeutic Chemical (ATC) classification system and the Defined Daily Dose (DDD) as a measuring unit have become the gold standard for international drug utilization monitoring and research....

WHO Collaborating Centre for Drug Statistics Methodology, from their own opening paragraph

Other pharma data models

ISO 11238 IDMP (Identification of Medicinal Products) Information Model National Drug Code (NDC) Code System SPL (Structured Product Labeling) Exchange Schema
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Model Details
Steward WHO Collaborating Centre for Drug Statistics Methodology
Layer Code System
Domain Pharma
Status live
Access Specification sold by the steward
Go to the steward →
How I know this

Compiled for the API Evangelist data model catalog, then confirmed against the steward's own site.

Confirmed 2026-08-11

Evidence: name evidence 2/2. Found something wrong? Tell me — corrections are cheap and I would rather be right.

Modernity Profile
Access Enclosed
Assessed 33.0% of the rubric

Not enough of this standard was readable to place it in a band. That is a limit of what I could see, not a finding against the standard.

A separate measure from the Kin Score, which rates API providers. This rates how current a standard is in how it is expressed, published and paid for — not how good it is. EDIFACT and X12 score low here and move an enormous share of world trade.

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