Abscess of tendon sheath, left upper arm

This code signifies an infection with pus formation within the synovial sheath surrounding a tendon in the patient's left upper arm. This condition, often bacterial, can lead to pain, swelling, and restricted movement of the affected limb.

Apply this code when documentation clearly indicates an abscess involving a tendon sheath specifically located in the left upper arm. This typically follows a diagnosis of tenosynovitis with evidence of purulent collection, often confirmed by imaging or surgical findings.

• Ensure laterality (left) and anatomical site (upper arm) are explicitly documented.
• Distinguish from cellulitis or abscesses of the surrounding soft tissue not involving the tendon sheath.
• Consider an additional code for the causative organism if identified and documented.