Oth fx fourth MC bone, right hand, subs for fx w delay heal

This code signifies a fracture of the fourth metacarpal bone in the right hand, which is not a Salter-Harris, Boxer's, or other specified type. The fracture is currently in a phase of delayed healing, meaning the bone is not mending at the expected rate for its type and location. This indicates ongoing medical management is required due to the prolonged healing process.

This code is appropriate when a patient presents for follow-up care of a right fourth metacarpal fracture that has not healed within the typical timeframe. It should be used for subsequent encounters where the physician documents delayed union or non-union is suspected but not yet confirmed as a nonunion. This code is applicable for ongoing treatment, imaging, or evaluation related to the delayed healing.

• Ensure documentation clearly specifies "delayed healing" for the right fourth metacarpal fracture.
• Verify the encounter is "subsequent" and not an initial treatment for the fracture.
• Distinguish from nonunion (M84.3x) if delayed healing progresses to a confirmed nonunion.