ICD-10-CM · Chapter 18 · R00-R99
R18 Ascites
Includes
- fluid in peritoneal cavity
Excludes 1 (cannot be coded together)
- ascites in alcoholic cirrhosis (K70.31)
- ascites in alcoholic hepatitis (K70.11)
- ascites in toxic liver disease with chronic active hepatitis (K71.51)
Subcodes
Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.
| Code | Description | Billable |
|---|---|---|
| R18..0 | Malignant ascites | Yes |
| R18..8 | Other ascites | Yes |
Last reviewed: September 2026