Injury of unspecified iliac blood vessel(s), sequela

This code signifies a long-term or late effect resulting from an injury to an unspecified blood vessel within the iliac region. This could involve any of the iliac arteries or veins, and the specific vessel is not documented. The "sequela" designation indicates that the initial injury has healed, but residual problems or conditions persist.

Utilize this code when documentation clearly indicates a current condition or complication directly attributable to a past injury of an iliac blood vessel, and the specific vessel (e.g., common, external, internal iliac artery/vein) is not identified. This is appropriate for follow-up encounters addressing chronic issues stemming from such an injury.

• Always assign an additional code to describe the specific sequela or residual condition (e.g., chronic pain, vascular insufficiency).
• Ensure the "S" seventh character is used for sequela, indicating a late effect.
• Avoid using this code if the specific iliac blood vessel injured is known and documented; instead, use a more precise code from the S35.5 subcategory.