R18.0 MALIGNANT ASCITES

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Code Information

Diagnosis Code: R18.0

Short Description: Malignant ascites

Long Description: Malignant ascites

The code R18.0 is VALID for claim submission

Code Classification:

Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00–R99)
- Symptoms and signs involving the digestive system and abdomen (R10-R19)
  - Ascites (R18)
    - R18.0 Malignant ascites

This code is valid for unacceptable principal diagnosis

Code Version: 2022 ICD-10-CM

Synonyms

Ascitic fluid examination abnormal
Ascitic fluid: malignant cells
Malignant ascites
Peritoneal fluid abnormal

Diagnostic Related Group(s)

The code R18.0 is grouped in the following Diagnostic Related Group(s) (MS-DRG v39.0)

Signs And Symptoms With Mcc (947)
Signs And Symptoms Without Mcc (948)

References to Index of Diseases and Injuries

The code R18.0 has the following ICD-10-CM references to the Index of Diseases and Injuries

Code First:
- malignancy, such as:
- malignant neoplasm of ovary (@C56*.-)
- secondary malignant neoplasm of retroperitoneum and peritoneum (@C78.6*)

Crosswalk Information

ICD-10 Code		ICD-9 Code	ICD-9 Description
R18.0		789.51	Malignant ascites

This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code	ICD-10 Description
R18	Ascites
R18.8	Other ascites

This page was last updated on: 10/1/2023

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