Integrated Campaign Registry (ICR) Implementation Guide
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CodeSystem: ICR Denominator Source

Official URL: https://icr.healthcampaigns.org/CodeSystem/icr-denominator-source-cs Version: 0.1.0
Draft as of 2026-08-07 Computable Name: ICRDenominatorSourceCS

The method/source behind a target-population estimate. Every estimate carries its source and date — the denominator is the dominant source of error in campaign analytics (working doc §4.2).

This Code system is referenced in the content logical definition of the following value sets:

This case-sensitive code system https://icr.healthcampaigns.org/CodeSystem/icr-denominator-source-cs defines the following codes:

CodeDisplayDefinition
census National census Direct census count.
census-projection Census projection Forward-projected census figure.
microcensus Microcensus / enumeration Local enumeration from microplanning or household registration.
worldpop WorldPop modelled estimate Modelled gridded population estimate (WorldPop).
grid3 GRID3 modelled estimate Modelled gridded population estimate (GRID3).
hmis HMIS-derived Derived from routine HMIS targets or registers.
govt-estimate Government estimate An official government figure whose underlying method is unspecified — the low-precision escape that lets early or administrative estimates declare a source (v0.1: denominator-source is mandatory on every estimate).
unknown Unknown Source not recorded — for historical/back-loaded datasets where provenance cannot be reconstructed.
other Other Other source — record detail in text.