| Source ICD-10 | Mapping Type | Target ICD-9 |
| Recommended Mapping (based on statistical analysis) |
| S20129A (Diagnosis) - Blister (nonthermal) of breast, unsp breast, init encntr (Blister (nonthermal) of breast, unspecified breast, initial encounter) | Single To Single | 9112 (Diagnosis) - Blister trunk (Blister of trunk, without mention of infection) |
| CMS/CDC General Equivalence Mappings |
| S20129A (Diagnosis) - Blister (nonthermal) of breast, unsp breast, init encntr (Blister (nonthermal) of breast, unspecified breast, initial encounter) | Single To Single | Alternative #1: 9112 (Diagnosis) - Blister trunk (Blister of trunk, without mention of infection) |