The patient is a 26-year-old male who comes into the ER complaining of pain in his left arm. X-rays reveal a malunion of a fracture he sustained six months ago skiing. The patient also has a diagnosis of AIDS with a past history of pneumonia due to AIDS. This is coded as ________.
1) AIDS, pneumonia, malunion of fracture
2) Malunion of fracture, AIDS
3) AIDS, malunion of fracture, pneumonia
4) Malunion of fracture