Disp fx of proximal phalanx of right thumb, sequela

This code signifies a long-term complication or late effect stemming from a previously sustained fracture of the thumb's proximal phalanx on the right hand, where the bone fragments were not in their normal anatomical alignment at the time of the original injury. This could include chronic pain, deformity, nonunion, malunion, or restricted range of motion directly attributable to the past displaced fracture.

Use this code when documenting conditions that are residual effects of a healed or unhealed displaced fracture of the right thumb's proximal phalanx, occurring at least a year after the initial injury. This is appropriate for follow-up visits addressing ongoing issues like chronic stiffness, arthritis, or nerve damage resulting from the original fracture.

• Always use this code as a secondary diagnosis, following a code that describes the specific sequela (e.g., M20.001 for acquired deformity of thumb).
• Ensure documentation clearly links the current condition to the past displaced fracture of the right thumb's proximal phalanx.
• The "S" seventh character indicates sequela, meaning the condition is a late effect of the original injury, not the acute fracture itself.