Table 1.
Diagnoses of risk factors
| Risk factors | ICD-9-CM codes (2010–2015) | ICD-10-CM codes (2016–2019) |
|---|---|---|
| Maternal risk factors | ||
| Maternal fever | 659.20, 659.21, 659.23, 780.6 | O75.2, R50. 9 |
| Chorioamnionitis | 658.4x, 762.7 | O41.101x, O41.102x, O41.103x, O41.1090, O41.121x, O41.122x, O41.123x, O41.1290, P02.7 |
| Genitourinary tract infections | 599.0, 646.6x | N39.0, O23.xx |
| Group B streptococcus (GBS) colonization | V02.51 | Z22.330 |
| Pneumonia | 480.x-486 | J12.xx-J18.x |
| Premature rupture of membranes (PROM) | 658.1x | O42 |
| Delivery by Cesarean section | 669.70, 669.71, V30.01, V31.01, V32.01, V33.01, V34.01, V35.01, V36.01, V37.01, V39.01 | O82, Z38.01, Z38.31, Z38.62, Z38.64,, Z38.66, Z38.69, DRG 765, DRG 766 |
| Maternal systemic lupus erythematosus (SLE) | 710.0 | M32.xx |
| Maternal diabetes mellitus | 250.xx, 648.0x | E08.xxx-E13.xxx, O24.xxx |
| Neonatal risk factors | ||
| Birth injury | 767.x | P10.x-P15.x |
| Meconium aspiration syndrome (MAS) | 770.1 | P24.0x, P24.1x |