K21.0 is the ICD-10 code for Gastro-oesophageal reflux disease with oesophagitis. It is a four-character subcategory of K21 (Gastro-oesophageal reflux disease), 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
What K21.0 includes
Conditions and terms that are coded here.
- Reflux oesophagitis
K21.0 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
K21.0Gastroøsofageal reflukssykdom med øsofagitt
DK210Gastro-øsofagal refluks med øsofagitis
K21.0Ruokatorven refluksisairaus ja ruokatorvitulehdus
K21.0Gastroösophageale Refluxkrankheit mit Ösophagitis
K21.0Reflux gastroœsophagien avec œsophagite
K21.0gastro-oesofageale reflux met oesofagitis
Listed through more specific codes:
- K21.00Gastro-esophageal reflux disease with esophagitis, without bleeding
- K21.01Gastro-esophageal reflux disease with esophagitis, with bleeding
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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