Arteriovenous malformation, site unspecified

This code signifies an abnormal, tangled connection between arteries and veins, bypassing the capillary system, where the specific anatomical location of this malformation is not documented. These direct shunts can lead to high-pressure flow into veins, potentially causing rupture, hemorrhage, or ischemia in surrounding tissues.

Use this code when documentation confirms an arteriovenous malformation (AVM) but does not specify its location (e.g., cerebral, pulmonary, spinal, peripheral). This is appropriate for initial diagnostic findings or when the exact site is still under investigation.

• Avoid using this code if the AVM's anatomical site is known; instead, code to the most specific location available.
• Review imaging reports (MRI, CT angiogram, conventional angiography) for precise anatomical detail.
• Consider if an additional code for any associated symptoms or complications (e.g., hemorrhage, neurological deficits) is also warranted.