K31.9 is the ICD-10 code for Disease of stomach and duodenum, unspecified. It is a four-character subcategory of K31 (Other diseases of stomach and duodenum), the most specific level in the WHO edition. It belongs to the block K20–K31 (Diseases of oesophagus, stomach and duodenum) in Chapter XI, Diseases of the digestive system.
- Code type
- Subcategory (4 characters)
- Chapter
- XI · K00–K93
- Classification
- WHO ICD-10, 2019 version
K31.9 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
K31.9Sjukdom i magsäcken och tolvfingertarmen, ospecificerad
K31.9Uspesifisert sykdom i magesekk eller tolvfingertarm
DK319Sygdom i mavesækken eller duodenum UNS
K31.9Määrittämätön mahalaukku- ja/tai pohjukaissuolisairaus
K31.9Krankheit des Magens und des Duodenums, nicht näher bezeichnet
K31.9Maladie de l'estomac et du duodénum, sans précision
K31.9ziekte van maag en duodenum, niet-gespecificeerd
K31.9Disease of stomach and duodenum, unspecified
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
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