A patient is referred to a pulmonologist when pneumonia is severe, slow to heal, or complicated by other lung or health problems. This specialist steps in if symptoms don’t improve with regular antibiotics or if breathing difficulties and complications like fluid buildup occur. Pulmonologists use advanced tools such as chest CT scans, bronchoscopy, and lung function tests to assess the lungs in detail. They can also provide oxygen therapy, drain chest fluid, or manage ventilator support when needed, offering expert care for faster and more complete recovery.