| Source ICD-10 | Mapping Type | Target ICD-9 |
| Recommended Mapping (based on statistical analysis) |
| O43101 (Diagnosis) - Malformation of placenta, unspecified, first trimester | Single To Single | 65671 (Diagnosis) - Oth placent cond-deliver (Other placental conditions, affecting management of mother, delivered, with or without mention of antepartum condition) |
| CMS/CDC General Equivalence Mappings |
| O43101 (Diagnosis) - Malformation of placenta, unspecified, first trimester | Single To Single | Alternative #1: 65671 (Diagnosis) - Oth placent cond-deliver (Other placental conditions, affecting management of mother, delivered, with or without mention of antepartum condition) |
Single To Single | Alternative #2: 65673 (Diagnosis) - Oth placent cond-antepar (Other placental conditions, affecting management of mother, antepartum condition or complication) |