Swan-neck deformity of right finger(s)

This code describes a specific digital deformity characterized by hyperextension of the proximal interphalangeal (PIP) joint and compensatory flexion of the distal interphalangeal (DIP) joint, affecting one or more fingers of the patient's right hand. This results in a characteristic "swan-neck" appearance of the affected digit(s).

Apply this code when documentation clearly indicates a swan-neck deformity present in any finger(s) of the right hand. This condition is often associated with rheumatoid arthritis, psoriatic arthritis, or trauma. Supporting documentation should specify the laterality and the nature of the deformity.

• Ensure the documentation explicitly states "right finger(s)" to justify laterality.
• Do not confuse with boutonnière deformity, which involves flexion of the PIP joint and hyperextension of the DIP joint.
• Code any underlying systemic conditions, such as rheumatoid arthritis, as primary diagnoses when applicable, with the swan-neck deformity as a secondary diagnosis.