Abscess of tendon sheath, left lower leg

This code signifies an infection with pus formation within the synovial sheath surrounding a tendon in the patient's left lower leg. This condition, often bacterial, can lead to pain, swelling, and impaired tendon function.

Apply this code when documentation clearly indicates a localized collection of pus within a tendon sheath affecting the left lower leg. Supporting documentation should include physician notes detailing findings such as fluctuance, erythema, and purulent discharge, often confirmed by imaging or aspiration.

• Ensure laterality is precisely documented (left lower leg).
• Distinguish from cellulitis or fasciitis without tendon sheath involvement.
• Consider an additional code for the causative organism if identified and documented.