Unsp fx shaft of unsp ulna, init for opn fx type I/2

This code signifies a break in the main part (shaft) of the ulna bone, where the specific location of the fracture along the shaft is not documented. It also indicates that the fracture is open, meaning the bone has broken through the skin, and is classified as either Type I or Type II according to the Gustilo-Anderson classification. This is the initial encounter for treatment of this injury.

This code is appropriate when documentation confirms an open fracture of the ulnar shaft, but lacks precise details regarding the fracture's exact segment (e.g., proximal, middle, distal third). It is used for the initial phase of care, such as emergency department visits or initial hospitalization, for an open fracture that is described as Type I or II.

• Ensure the documentation clearly states "open fracture" and specifies Gustilo-Anderson Type I or II.
• Only use this code for the initial treatment encounter; subsequent encounters will require different seventh characters.
• If the specific location of the shaft fracture (e.g., proximal, middle, distal) is documented, a more specific code should be selected.