ICD Code R18.8

ICD code R18.8 is used to indicate the presence of ascites (the accumulation of fluid in the abdomen) that does not fall under more specific categories, meaning it is due to causes other than the most common or well-defined types.

1. Presence of abnormal accumulation of fluid in the peritoneal cavity not attributable to cirrhosis, malignancy, or heart failure

2. Clinical evidence of ascites on physical examination, such as abdominal distension, shifting dullness, or fluid wave

3. Imaging studies (ultrasound, CT, or MRI) confirming ascitic fluid without a clear etiology linked to common causes

4. Laboratory analysis of ascitic fluid excluding infection, malignancy, or portal hypertension as primary causes

5. Symptoms may include abdominal discomfort, bloating, early satiety, and weight gain due to fluid accumulation

6. Exclusion of specific types of ascites, such as chylous, hemorrhagic, or malignant ascites

Relevant CPT codes that may be used to treat ICD code R18.8 include:

- 49083 (Abdominal paracentesis, with imaging guidance)

- 49080 (Abdominal paracentesis, without imaging guidance)

- 49405 (Insertion of tunneled intraperitoneal catheter, with subcutaneous port)

- 49406 (Removal of tunneled intraperitoneal catheter)

- 36556 (Insertion of non-tunneled centrally inserted central venous catheter, age 5 years or older)

- 99201–99499 (Evaluation and management codes, as appropriate for office or inpatient visits related to management of ascites)

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