Nondisp transverse fx unsp patella, init for opn fx type I/2

This code describes a break across the patella (kneecap) that has not shifted out of alignment. The fracture is exposed to the outside environment through a wound, classified as either Type I or Type II according to the Gustilo-Anderson classification, indicating a relatively clean wound with minimal to moderate soft tissue damage.

Use this code for initial encounters when documentation confirms a transverse patellar fracture that is nondisplaced and presents as an open fracture of Gustilo-Anderson Type I or II. This typically occurs following direct trauma to the knee, such as a fall or direct impact, where the skin is broken and communicates with the fracture site.

• Ensure the documentation clearly specifies "nondisplaced" and "transverse" for the patellar fracture.
• Verify the open fracture type (Gustilo-Anderson I or II) is explicitly stated or clearly inferable from the wound description.
• This "B" encounter code is only for the initial treatment phase of the fracture.