Thoracic aortic aneurysm, without rupture, unspecified

This code signifies a localized dilation or bulging of the thoracic aorta, the major blood vessel carrying blood from the heart through the chest, which has not ruptured. It indicates the presence of an aneurysm in the chest portion of the aorta without specifying the exact location within the thoracic segment (e.g., ascending, descending, arch) and without evidence of a life-threatening tear or burst.

Use this code when documentation clearly states a thoracic aortic aneurysm is present but does not specify if it's in the ascending, descending, or arch segments, and explicitly confirms there is no rupture. This code is appropriate when the physician's notes indicate "thoracic aortic aneurysm, unruptured" or "thoracic aortic aneurysm, NOS" (not otherwise specified).

• Do not use this code if the documentation specifies the exact location within the thoracic aorta (e.g., ascending, descending, arch); instead, use a more specific I71.2x code.
• Avoid this code if there is any indication of rupture; refer to codes in the I71.1x series for ruptured thoracic aneurysms.
• Ensure the medical record supports the "unspecified" nature of the aneurysm's location within the thoracic aorta. If a more specific location is known, query the provider for clarification.