Abscess of tendon sheath, unspecified lower leg

This code signifies an infection with pus formation within the synovial sheath surrounding a tendon in the lower leg, where the specific location within the lower leg is not documented. This condition typically presents with localized pain, swelling, redness, and warmth along the tendon's course, often limiting movement.

Apply this code when documentation clearly indicates an abscess of a tendon sheath in the lower leg, but the precise anatomical site (e.g., ankle, foot, calf) is not specified. This code is appropriate when the provider's notes describe an infected tenosynovitis or purulent tenosynovitis of the lower leg without further anatomical detail.

• Ensure the documentation explicitly states "abscess" or "purulent" within the tendon sheath; simple tenosynovitis without infection is coded differently.
• Prioritize more specific codes if the documentation identifies the exact tendon or anatomical region (e.g., ankle, foot) of the abscess.
• Always review for associated systemic infections or underlying causes that may require additional coding.