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

This code describes a fracture of the first metacarpal bone (thumb) in the right hand, where the specific type of fracture is not documented. It indicates that the patient is in a phase of treatment where the fracture is not healing at the expected rate.

This code is appropriate for follow-up encounters for a right thumb metacarpal fracture that is demonstrating delayed union or non-union, and the initial fracture type was not specified. It should be used when the patient is receiving ongoing care for the slow-healing fracture.

• Ensure documentation clearly states "delayed healing" or "delayed union" for the right first metacarpal fracture.
• Verify that the encounter is for follow-up care, not initial treatment.
• If the specific type of first metacarpal fracture (e.g., Bennett's, Rolando's) is known, a more specific code should be used.