Oth fx upr end r rad, subs for opn fx type 3A/B/C w nonunion

This code signifies a subsequent encounter for an open fracture of the upper end of the right radius, specifically involving a Type IIIA, IIIB, or IIIC open fracture that has developed nonunion. Nonunion indicates a failure of the bone to heal after a sufficient period of time, requiring further medical intervention. The "subsequent encounter" aspect means the patient is receiving ongoing care for this previously diagnosed and treated fracture complication.

Use this code when a patient presents for follow-up care, treatment, or evaluation of a right radial head or neck fracture that was initially an open Type IIIA, IIIB, or IIIC injury and has now been diagnosed with nonunion. This applies to situations such as surgical intervention for nonunion (e.g., bone grafting, revision fixation), ongoing conservative management, or assessment of the nonunion's progression.

• Ensure documentation clearly specifies the right radius, the "upper end" location, and the open fracture type (IIIA, IIIB, or IIIC).
• Verify that "nonunion" is explicitly documented by the provider, not just delayed healing.
• Confirm this is a subsequent encounter for the fracture, not the initial treatment.