Nondisp fx of proximal phalanx of unsp thumb, init

This code signifies a break in the bone of the thumb's first segment, closest to the hand, where the bone fragments remain in their normal anatomical position. It indicates the initial treatment for this type of fracture, which has not broken through the skin. The specific thumb (left or right) is not documented or known.

Apply this code when a patient presents with a newly diagnosed, non-displaced fracture of the proximal phalanx of the thumb, and the medical record does not specify which thumb is affected. This is appropriate for the initial encounter for treatment of a closed fracture, such as after a fall or direct impact to the thumb.

• Ensure documentation explicitly states "nondisplaced" and "proximal phalanx" of the thumb.
• Only use this code for the initial encounter for treatment of the fracture.
• Confirm the fracture is "closed" (skin intact) before applying this code.