Patient presents with symptoms suggestive of pleural effusion, including dyspnea, pleuritic chest pain, and cough.  On physical examination, decreased breath sounds, dullness to percussion, and reduced tactile fremitus were noted over the affected area.  Imaging studies, specifically a chest x-ray and subsequent pleural ultrasound, confirmed the presence of fluid in the pleural space.  Thoracentesis was performed, and pleural fluid analysis is pending.  Differential diagnosis includes transudative pleural effusion causes such as congestive heart failure, cirrhosis, and nephrotic syndrome, as well as exudative effusion etiologies such as pneumonia, malignancy, and tuberculosis.  Treatment plan includes addressing the underlying cause of the effusion and symptomatic management with oxygen therapy and pain control.  Further evaluation may include pleural biopsy if the fluid analysis suggests malignancy or infection.  Patient education provided regarding the condition, potential complications such as empyema and pneumothorax, and the importance of follow-up care.  ICD-10 code J90 will be used for the diagnosis of pleural effusion, with additional codes added based on the underlying etiology once confirmed.  CPT codes for the thoracentesis and pleural fluid analysis will be documented and billed accordingly.  Continued monitoring of respiratory status and symptomatic management are essential components of the ongoing care plan.