In simple words: This code represents bleeding in the lungs of infants older than 28 days, where the cause is unknown.

Acute idiopathic pulmonary hemorrhage in infants (AIPHI). Acute idiopathic hemorrhage in infants over 28 days old. Excludes1: perinatal pulmonary hemorrhage (P26.-) and von Willebrand disease (D68.0-).

Example 1: A 2-month-old infant presents with coughing, difficulty breathing, and blood in the sputum. After a thorough investigation, including ruling out infections, congenital abnormalities, and bleeding disorders, no clear cause for the pulmonary hemorrhage is found, and the diagnosis of AIPHI is made., A 6-week-old infant is brought to the emergency room with sudden onset of respiratory distress and blood-tinged secretions from the nose and mouth. Initial tests do not reveal any obvious cause for the bleeding. Following further investigation and consultation with specialists, the infant is diagnosed with AIPHI., A 3-month-old infant is admitted to the hospital with repeated episodes of coughing up blood. After extensive testing, including blood work, imaging studies, and bronchoscopy, no specific cause for the bleeding can be identified, leading to a diagnosis of AIPHI.

Detailed history and physical examination findings, including age of onset, symptoms, and any associated conditions. Results of laboratory tests, such as blood counts, coagulation studies, and cultures, to rule out other potential causes. Imaging studies, like chest X-rays or CT scans, to evaluate the extent of the hemorrhage. Bronchoscopy findings, if performed, to directly visualize the airways and obtain samples for analysis.