Unsp fx first MC bone, unsp hand, subs for fx w delay heal

This code signifies a fracture of the first metacarpal bone (thumb) where the specific location or type of fracture is not documented. The injury has been previously treated, but the bone is not healing at the expected rate.

Apply this code when a patient presents for follow-up care of a previously diagnosed and treated first metacarpal fracture, and the physician's documentation explicitly states "delayed healing" without specifying the exact fracture type or laterality. This is appropriate for subsequent encounters after initial treatment.

• Ensure documentation clearly indicates "delayed healing" for a subsequent encounter.
• Only use this code when the specific fracture type (e.g., Bennett's, Rolando's) is not identified, and the hand laterality is also unspecified.
• Pair with an external cause code if the mechanism of injury is relevant and documented.