Abscess of tendon sheath, right shoulder

This code describes an infection with pus formation within the synovial sheath surrounding a tendon in the right shoulder. This condition, often bacterial, leads to inflammation, pain, and restricted movement of the affected tendon.

Use this code when documentation clearly indicates an abscess involving a tendon sheath in the right shoulder. Supporting documentation should include clinical findings of infection (e.g., erythema, warmth, fluctuance, purulent drainage) and a definitive diagnosis of abscess.

• Specify laterality; this code is for the right shoulder only.
• Distinguish from simple tenosynovitis (M65.8xx) or cellulitis (L03.11x) without abscess formation.
• Code any underlying systemic infection or causative organism (e.g., Staphylococcus aureus) as an additional diagnosis.