Aneurysm of pulmonary artery

This code represents an acquired dilation or ballooning of the pulmonary artery, which is the main blood vessel carrying deoxygenated blood from the heart to the lungs. This condition can be asymptomatic or lead to symptoms such as dyspnea, chest pain, or hemoptysis due to compression of surrounding structures or rupture.

Assign this code when documentation explicitly states an acquired aneurysm of the pulmonary artery. This diagnosis is typically supported by imaging studies such as CT angiography, MRI, or echocardiography, confirming the presence and location of the aneurysm.

• Differentiate carefully between acquired and congenital pulmonary artery aneurysms; congenital forms are excluded.
• Ensure the documentation specifies "pulmonary artery" to avoid confusion with aneurysms of other vessels.
• Code any associated conditions, such as pulmonary hypertension or connective tissue disorders, as secondary diagnoses.