| Source ICD-10 | Mapping Type | Target ICD-9 |
| Recommended Mapping (based on statistical analysis) |
| O411490 (Diagnosis) - Placentitis, unsp trimester, not applicable or unspecified (Placentitis, unspecified trimester, not applicable or unspecified) | Single To Single | 65840 (Diagnosis) - Amniotic infection-unsp (Infection of amniotic cavity, unspecified as to episode of care or not applicable) |
| CMS/CDC General Equivalence Mappings |
| O411490 (Diagnosis) - Placentitis, unsp trimester, not applicable or unspecified (Placentitis, unspecified trimester, not applicable or unspecified) | Single To Single | Alternative #1: 65840 (Diagnosis) - Amniotic infection-unsp (Infection of amniotic cavity, unspecified as to episode of care or not applicable) |