Unsp fx fourth MC bone, left hand, subs for fx w delay heal

This code signifies a fracture of the fourth metacarpal bone in the left hand where the specific type of fracture (e.g., transverse, oblique) is not documented. The patient is in a subsequent phase of care, and the fracture is exhibiting delayed healing, meaning it is taking longer than expected to unite.

This code is appropriate for follow-up encounters where a patient with a previously diagnosed, unspecified left fourth metacarpal fracture is being evaluated for slow or insufficient bone healing. It is used when the physician explicitly documents "delayed healing" for this specific fracture.

• Ensure documentation clearly states "delayed healing" for the left fourth metacarpal fracture.
• Verify that the encounter is for follow-up care, not initial treatment.
• Confirm that the fracture type is indeed unspecified in the medical record.