| Source ICD-10 | Mapping Type | Target ICD-9 |
| Recommended Mapping (based on statistical analysis) |
| S52241N (Diagnosis) - Displ spiral fx shaft of ulna, r arm, 7thN (Displaced spiral fracture of shaft of ulna, right arm, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion) | Single To Single | 73382 (Diagnosis) - Nonunion of fracture |
| CMS/CDC General Equivalence Mappings |
| S52241N (Diagnosis) - Displ spiral fx shaft of ulna, r arm, 7thN (Displaced spiral fracture of shaft of ulna, right arm, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion) | Single To Single | Alternative #1: 73382 (Diagnosis) - Nonunion of fracture |