Patient presents with symptoms suggestive of pneumonitis.  Clinical presentation includes [Insert presenting symptoms e.g., cough, shortness of breath, dyspnea, fever, chest pain, fatigue, hypoxia].  Onset of symptoms occurred [Insert timeframe e.g., gradually over the past week, acutely two days ago].  Patient history includes [Insert relevant medical history e.g., recent upper respiratory infection, exposure to environmental toxins, history of autoimmune disease, medication history including amiodarone, methotrexate, radiation therapy].  Physical examination reveals [Insert findings e.g., diminished breath sounds, crackles, wheezing, tachypnea].  Differential diagnosis includes infection, aspiration, hypersensitivity pneumonitis, drug-induced pneumonitis, radiation pneumonitis, and interstitial lung disease.  Ordered tests include chest x-ray, chest CT scan, pulmonary function tests (PFTs), arterial blood gas (ABG), and possibly bronchoscopy with bronchoalveolar lavage (BAL) to evaluate for infectious or non-infectious etiologies.  Initial impression suggests [Insert suspected etiology e.g., possible viral pneumonitis, suspected drug-induced pneumonitis].  Treatment plan includes [Insert treatment plan e.g., supplemental oxygen, corticosteroids, antibiotics if bacterial infection suspected, supportive care].  Patient education provided on symptom management, follow-up care, and potential complications.  Diagnosis will be further refined pending results of diagnostic tests.  Follow-up scheduled in [Insert timeframe e.g., one week, two weeks].  ICD-10 code considerations include J18.9 for Pneumonia, unspecified organism, or more specific codes based on etiology once confirmed.  Medical billing and coding will reflect the definitive diagnosis and procedures performed.  Patient advised to return to the clinic or emergency department if symptoms worsen or new symptoms develop.