Aneurysm of pulmonary artery

This code signifies an abnormal, localized dilation or ballooning of the pulmonary artery, which is the major blood vessel carrying deoxygenated blood from the heart to the lungs. This condition can be congenital or acquired and may lead to serious complications such as rupture, thrombosis, or compression of adjacent structures.

Use this code when documentation explicitly states a diagnosis of an aneurysm affecting the pulmonary artery. This typically applies to patients identified through imaging studies like CT scans, MRIs, or echocardiograms that visualize the pulmonary vasculature. Supporting documentation should clearly specify the presence and location of the aneurysm.

• Differentiate from pulmonary artery dilatation without true aneurysm formation.
• Do not confuse with aneurysms of other major arteries (e.g., aortic aneurysm).
• Consider sequencing this code as a primary diagnosis if it is the reason for the encounter or as a secondary diagnosis if it is a co-morbidity impacting treatment.