Oth injury of left innominate or subclavian vein, sequela

This code indicates a long-term complication or residual effect stemming from a previous injury to the left innominate (brachiocephalic) or subclavian vein, where the specific nature of the original injury is known but not captured by more specific codes. These sequelae could include chronic pain, venous insufficiency, or other persistent issues directly attributable to the past trauma.

Use this code when documenting a current condition that is a direct result of an old, resolved injury to the left innominate or subclavian vein. This applies when the acute phase of the injury has passed, and the patient is now presenting with a lasting consequence. Examples include chronic venous obstruction or post-thrombotic syndrome following a remote penetrating trauma to the left subclavian vein.

• Always assign this code as a secondary diagnosis, following the code for the specific sequela (e.g., chronic venous insufficiency).
• Ensure documentation clearly links the current condition to a past injury of the specified vein.
• The "S" seventh character indicates a sequela, meaning the initial injury has healed, but its lasting effects are being treated.