Nondisp fx of shaft of first MC bone, unsp hand, init

This code describes a break in the main body (shaft) of the thumb metacarpal bone that has not shifted out of its normal alignment. It applies to an injury where the skin remains intact over the fracture site, and it is the patient's first presentation for this specific injury.

Use this code for a patient presenting with a newly diagnosed, non-displaced fracture of the first metacarpal shaft, confirmed by imaging, where the injury is closed. This would be appropriate for the initial visit to a physician or emergency department for evaluation and management of this specific fracture.

• Ensure documentation specifies "nondisplaced" and "shaft" of the first metacarpal.
• Verify the encounter is truly the "initial encounter" for this specific fracture.
• Confirm the fracture is "closed" (no open wound communicating with the fracture site).