Unsp fx upper end r rad, subs for opn fx type I/2 w nonunion

This code describes a situation where a patient has an unconfirmed type of fracture at the top part of their right radius bone. This specific encounter is for ongoing treatment of a previously open fracture (where the bone broke through the skin) that is now failing to heal properly.

Use this code when documenting a follow-up visit for a patient with a right radial head or neck fracture that was initially an open fracture (Gustilo type I or II) and is currently experiencing nonunion. This applies when the exact fracture pattern of the upper radius was not specified in the initial diagnosis.

• Ensure documentation clearly states "nonunion" for the fracture.
• Verify the fracture was initially an "open" fracture, specifically Gustilo type I or II.
• Confirm this is a subsequent encounter, not the initial treatment.