Patient presents with acute pulmonary edema, manifesting as severe shortness of breath (dyspnea), orthopnea, and paroxysmal nocturnal dyspnea.  Physical exam reveals tachypnea, tachycardia, bibasilar crackles, and possible S3 gallop.  The patient reports a history of congestive heart failure (CHF) and hypertension, which are likely contributing factors to the fluid buildup in the lungs.  Differential diagnoses considered include acute respiratory distress syndrome (ARDS), pneumonia, and pleural effusion.  Chest X-ray demonstrates interstitial edema and Kerley B lines, confirming the diagnosis of pulmonary edema.  Initial treatment includes supplemental oxygen, intravenous diuretics (furosemide) to reduce fluid overload, and continuous cardiac monitoring.  Patient's condition is being closely monitored for improvement.  Further investigations, such as echocardiography and B-type natriuretic peptide (BNP) levels, may be ordered to assess cardiac function and guide treatment.  Medical coding for this encounter will include ICD-10 code J81.0 for pulmonary edema and relevant codes for CHF and hypertension.  Medical billing will reflect the provided services, including evaluation and management (E and M), diagnostic testing, and therapeutic interventions.  Patient education provided on fluid restriction, medication compliance, and follow-up care.  Prognosis depends on underlying cause and response to treatment.