| Source ICD-10 | Mapping Type | Target ICD-9 |
| Recommended Mapping (based on statistical analysis) |
| P0730 (Diagnosis) - Preterm newborn, unspecified weeks of gestation | Single To Single | 76509 (Diagnosis) - Extreme immat 2500+g (Extreme immaturity, 2,500 grams and over) |
| CMS/CDC General Equivalence Mappings |
| P0730 (Diagnosis) - Preterm newborn, unspecified weeks of gestation | Single To Single | Alternative #1: 76509 (Diagnosis) - Extreme immat 2500+g (Extreme immaturity, 2,500 grams and over) |
Single To Single | Alternative #2: 76519 (Diagnosis) - Preterm NEC 2500+g (Other preterm infants, 2,500 grams and over) | Single To Single | Alternative #3: 76520 (Diagnosis) - Weeks of gestation NOS (Unspecified weeks of gestation) |