2013 ICD-9-CM Diagnosis Code 511.9
Unspecified pleural effusion
- presence of fluid in the pleural cavity resulting from excessive transudation or exudation from the pleural surfaces; it is a sign of disease and not a diagnosis in itself.
- An abnormal collection of fluid between the thin layers of tissue (pleura) lining the lung and the wall of the chest cavity.
- Increased amounts of fluid within the pleural cavity containing no malignant cells
- ICD-9-CM 511.9 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Applies To
Convert 511.9 to ICD-10-CM 
ICD-9-CM Volume 2 Index entries containing back-references to 511.9:
chest 
bacterial, nontuberculous 
