ICD-10 Diagnosis Code R18.0

Malignant ascites

Diagnosis Code R18.0

ICD-10: R18.0
Short Description: Malignant ascites
Long Description: Malignant ascites
This is the 2018 version of the ICD-10-CM diagnosis code R18.0

Valid for Submission
The code R18.0 is valid for submission for HIPAA-covered transactions.

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)

Information for Medical Professionals

According to ICD-10-CM guidelines this code should not to be used as a principal diagnosis code when a related definitive diagnosis has been established.

Code Edits
The following edits are applicable to this code:
Unacceptable principal diagnosis Additional informationCallout TooltipUnacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual’s health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Diagnostic Related Groups
The diagnosis code R18.0 is grouped in the following Diagnostic Related Group(s) (MS-DRG V35.0)


Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

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

Index of Diseases and Injuries
References found for the code R18.0 in the Index of Diseases and Injuries:

Information for Patients

Liver Diseases

Also called: Hepatic disease

Your liver is the largest organ inside your body. It helps your body digest food, store energy, and remove poisons.

There are many kinds of liver diseases:

  • Diseases caused by viruses, such as hepatitis A, hepatitis B, and hepatitis C
  • Diseases caused by drugs, poisons, or too much alcohol. Examples include fatty liver disease and cirrhosis.
  • Liver cancer
  • Inherited diseases, such as hemochromatosis and Wilson disease

Symptoms of liver disease can vary, but they often include swelling of the abdomen and legs, bruising easily, changes in the color of your stool and urine, and jaundice, or yellowing of the skin and eyes. Sometimes there are no symptoms. Tests such as imaging tests and liver function tests can check for liver damage and help to diagnose liver diseases.

  • ALP isoenzyme test (Medical Encyclopedia)
  • Ascites (Medical Encyclopedia)
  • Diet - liver disease (Medical Encyclopedia)
  • Hepatic encephalopathy (Medical Encyclopedia)
  • Hepatomegaly (Medical Encyclopedia)
  • Liver disease (Medical Encyclopedia)
  • Liver scan (Medical Encyclopedia)

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