Unsp inj less saphenous at low leg level, left leg, sequela

This code signifies an unspecified injury to the lesser saphenous vein in the left lower leg, indicating that the specific nature of the trauma (e.g., laceration, contusion) is not documented. The "sequela" designation means this code is used for the long-term effects or complications of an initial injury, not the acute event itself.

Apply this code when documenting a chronic or residual issue related to a past injury of the left lesser saphenous vein, where the exact type of injury is unknown. This is appropriate for follow-up encounters addressing persistent symptoms or complications from a previous, unspecified trauma to this specific vein.

• Ensure documentation clearly supports a "sequela" encounter, not an initial injury.
• Verify the injury is to the lesser saphenous vein and specifically on the left leg.
• If the specific type of injury is known, a more precise code from the S85.4- category should be used.