Nondisp fx of pisiform, unsp wrist, init for opn fx

This diagnosis code indicates a break in the pisiform bone, one of the small carpal bones in the wrist, where the bone fragments have not separated or shifted from their normal alignment. It specifically applies when the fracture has broken through the skin, exposing the bone to the external environment, and is being treated for the first time.

This code is appropriate for documenting an initial encounter for an open, nondisplaced fracture of the pisiform bone, regardless of which wrist is affected. It would be used when a patient presents with a new injury involving an open wound directly communicating with the fracture site.

• Ensure documentation clearly states the fracture is "nondisplaced" and "open."
• Verify this is the initial treatment for the fracture; subsequent care would require a different encounter character.
• Do not use this code if the fracture is displaced or if the open wound is not directly related to the fracture.