R18 is the ICD-10 code for Ascites. It is a three-character category that is not subdivided further. It belongs to the block R10–R19 (Symptoms and signs involving the digestive system and abdomen) in Chapter XVIII, Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.
- Code type
- Category (3 characters)
- Chapter
- XVIII · R00–R99
- Classification
- WHO ICD-10, 2019 version
What R18 includes
Conditions and terms that are coded here.
- Fluid in peritoneal cavity
R18 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
R18Ascites
DR18Ascites
- DR189Ascites UNS
R18Vesivatsa (askites)
R18Aszites
R18Ascite
R18ascites
Listed through more specific codes:
- R18.0Malignant ascites
- R18.8Other ascites
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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