Other specified diseases of pulmonary circulation

This code signifies various less common or atypical conditions affecting the pulmonary arteries, capillaries, and veins that are not specifically classified elsewhere. It encompasses a range of pulmonary vascular disorders beyond the more frequently encountered pulmonary embolism or primary pulmonary hypertension. These conditions can lead to impaired blood flow and gas exchange within the lungs.

Apply this code when documentation specifies a disease of the pulmonary circulation that doesn't fit into more specific ICD-9-CM categories for pulmonary hypertension, embolism, or other defined conditions. Examples include pulmonary veno-occlusive disease, pulmonary capillary hemangiomatosis, or other rare or ill-defined pulmonary vascular anomalies. The physician's notes should clearly describe the specific pulmonary circulatory disorder.

• Ensure the documentation explicitly states a "disease of pulmonary circulation" and not a sequela of another condition.
• Avoid using this code if a more specific ICD-9-CM code exists for the documented pulmonary circulatory disorder.
• Consider sequencing this code after the primary underlying condition if the pulmonary circulatory disease is a manifestation or complication.