| Source ICD-10 | Mapping Type | Target ICD-9 |
| Recommended Mapping (based on statistical analysis) |
| S8290XC (Diagnosis) - Unsp fracture of unsp lower leg, init for opn fx type 3A/B/C (Unspecified fracture of unspecified lower leg, initial encounter for open fracture type IIIA, IIIB, or IIIC) | Single To Single | 8271 (Diagnosis) - Fx lower limb NEC-open (Other, multiple and ill-defined fractures of lower limb, open) |
| CMS/CDC General Equivalence Mappings |
| S8290XC (Diagnosis) - Unsp fracture of unsp lower leg, init for opn fx type 3A/B/C (Unspecified fracture of unspecified lower leg, initial encounter for open fracture type IIIA, IIIB, or IIIC) | Single To Single | Alternative #1: 8271 (Diagnosis) - Fx lower limb NEC-open (Other, multiple and ill-defined fractures of lower limb, open) |