| Source ICD-10 | Mapping Type | Target ICD-9 |
| Recommended Mapping (based on statistical analysis) |
| O2690 (Diagnosis) - Pregnancy related conditions, unsp, unspecified trimester (Pregnancy related conditions, unspecified, unspecified trimester) | Single To Single | 64690 (Diagnosis) - Preg compl NOS-unspec (Unspecified complication of pregnancy, unspecified as to episode of care or not applicable) |
| CMS/CDC General Equivalence Mappings |
| O2690 (Diagnosis) - Pregnancy related conditions, unsp, unspecified trimester (Pregnancy related conditions, unspecified, unspecified trimester) | Single To Single | Alternative #1: 64690 (Diagnosis) - Preg compl NOS-unspec (Unspecified complication of pregnancy, unspecified as to episode of care or not applicable) |