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Figure 1. Number of Countries Using Various Primary Care Coding and Nomenclature Systems

Highlights of Moving Toward International Standards in Primary Care Informatics: Clinical Vocabulary

Bar chart shows the number of countries using the following systems: ICD-9, 18; ICD-10, 4; Read Codes (both versions), 6; SNOMED, 4; ICPC, 16; UMLS, 2; ICHPCC, 3; Other ICPC modifications, 3; Other, 6.

Note: ICD-9 is International Classification of Diseases, 9th Revision. ICD-10 is International Classification of Diseases, 10th Revision. SNOMED is Systematized Nomenclature of Human and Veterinary Medicine. ICPC is International Classification of Primary Care. UMLS is Unified Medical Language System. ICHPCC is International Classification of Health Problems in Primary Care.

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Page last reviewed November 1995
Internet Citation: Figure 1. Number of Countries Using Various Primary Care Coding and Nomenclature Systems: Highlights of Moving Toward International Standards in Primary Care Informatics: Clinical Vocabulary. November 1995. Agency for Healthcare Research and Quality, Rockville, MD. http://archive.ahrq.gov/research/findings/final-reports/pcinform/fig01.html