Nonunion of Fx
733.82 Nonunion of fracture
Here is some add'l info to assist you from coding clinic and you may consider a V code for the infection if that is appropriate.
Malunion vs. nonunion of fracture - guidelines
Coding Clinic, Second Quarter 1994 Page: 5
Effective with discharges: April 1, 1994
Malunion versus Nonunion
"Malunion" (code 733.81, Malunion of fracture) implies that bony healing has occurred but the fracture fragments are in poor position. Treatment of a malunion, in general, involves the surgical cutting of the bone (osteotomy), repositioning the bone, and usually the addition of some type of internal fixation with or without bone graft. Malunions are frequently diagnosed during a fracture's healing stages. Many malunions may be left without surgical interventions in hopes that the patient will have no functional problems. Surgery usually results from some functional disability or pain as a result of the less than anatomical position of the bones.
"Nonunion" (code 733.82, Nonunion of fracture) implies that no healing has occurred between fracture parts. Treatment of a nonunion, in general, involves opening the fracture, scraping away the intervening soft tissue (usually scar tissue) and doing a partial debridement of the bone end with repositioning of the bone. Usually, some type of internal fixation and bone grafting is also performed. The treatment of a nonunion is more complicated and difficult to perform than treatment of a malunion.