ICD-10-CM Diagnosis Code (2025)
Official Description for R18.0
Malignant ascites
Coding Notes & Guidelines for R18.0
Code First
- malignancy, such as:
- malignant neoplasm of ovary (C56.-)
- secondary malignant neoplasm of retroperitoneum and peritoneum (C78.6)
Parent Code (Less Specific):
About ICD-10-CM Code R18.0 (Malignant ascites)
ICD-10-CM code R18.0 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM R18.0 became effective on October 1, 2024.
This page provides detailed information about R18.0 - Malignant ascites. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Malignant ascites.