Aneurysm of aorta, specified as syphilitic

This code represents an aneurysm affecting the aorta, where the underlying cause is explicitly documented as syphilis. It indicates a late-stage manifestation of syphilis impacting the cardiovascular system, specifically leading to the dilation or ballooning of the aortic wall.

Use this code when physician documentation clearly states "syphilitic aneurysm of aorta" or "aortic aneurysm due to syphilis." This diagnosis typically arises in patients with a history of untreated or inadequately treated syphilis presenting with cardiovascular symptoms.

• Ensure the documentation explicitly links the aortic aneurysm to syphilis; "aortic aneurysm" alone is insufficient.
• Do not use this code if the cause of the aortic aneurysm is not specified as syphilitic; use a more general aortic aneurysm code.
• Consider sequencing this code after the primary diagnosis if the aneurysm is a complication of another condition being treated.