Pulmonary heart disease and diseases of pulmonary circulation (I26-I28)

ICD-10 codes I26-I28 classify conditions related to pulmonary heart disease and disorders of the pulmonary circulation, including pulmonary embolism, various forms of pulmonary hypertension, and diseases affecting pulmonary vessels. These codes specify conditions ranging from acute pulmonary embolism to chronic pulmonary hypertension and congenital or acquired pulmonary vessel abnormalities.

This range begins with I26, covering pulmonary embolism such as septic pulmonary embolism or saddle embolus, often specifying whether acute right heart strain (acute cor pulmonale) is present. The I27 codes describe other pulmonary heart diseases like primary pulmonary hypertension (also known as idiopathic or heritable pulmonary arterial hypertension), secondary pulmonary hypertension due to lung, heart or systemic causes, and chronic complications such as cor pulmonale. The range also includes Eisenmenger's syndrome and various other pulmonary hypertension types linked to conditions like lung disease or left heart disease. The final subset, I28, identifies other diseases of pulmonary vessels such as pulmonary artery aneurysms or arteriovenous fistulas. These detailed codes assist healthcare professionals and coders in accurately identifying pulmonary vascular and heart conditions for clinical, billing, and epidemiological purposes.