| P19 | Metabolic acidemia in newborn |
| P19.0 | Metabolic acidemia in newborn first noted before onset of labor |
| P19.1 | Metabolic acidemia in newborn first noted during labor |
| P19.2 | Metabolic acidemia noted at birth |
| P19.9 | Metabolic acidemia, unspecified |
| P22 | Respiratory distress of newborn |
| P22.0 | Respiratory distress syndrome of newborn |
| P22.1 | Transient tachypnea of newborn |
| P22.8 | Other respiratory distress of newborn |
| P22.9 | Respiratory distress of newborn, unspecified |
| P23 | Congenital pneumonia |
| P23.0 | Congenital pneumonia due to viral agent |
| P23.1 | Congenital pneumonia due to Chlamydia |
| P23.2 | Congenital pneumonia due to staphylococcus |
| P23.3 | Congenital pneumonia due to streptococcus, group B |
| P23.4 | Congenital pneumonia due to Escherichia coli |
| P23.5 | Congenital pneumonia due to Pseudomonas |
| P23.6 | Congenital pneumonia due to other bacterial agents |
| P23.8 | Congenital pneumonia due to other organisms |
| P23.9 | Congenital pneumonia, unspecified |
| P24 | Neonatal aspiration |
| P24.0 | Meconium aspiration |
| P24.00 | Meconium aspiration without respiratory symptoms |
| P24.01 | Meconium aspiration with respiratory symptoms |
| P24.1 | Neonatal aspiration of (clear) amniotic fluid and mucus |
| P24.10 | Neonatal aspiration of (clear) amniotic fluid and mucus without respiratory symptoms |
| P24.11 | Neonatal aspiration of (clear) amniotic fluid and mucus with respiratory symptoms |
| P24.2 | Neonatal aspiration of blood |
| P24.20 | Neonatal aspiration of blood without respiratory symptoms |
| P24.21 | Neonatal aspiration of blood with respiratory symptoms |
| P24.3 | Neonatal aspiration of milk and regurgitated food |
| P24.30 | Neonatal aspiration of milk and regurgitated food without respiratory symptoms |
| P24.31 | Neonatal aspiration of milk and regurgitated food with respiratory symptoms |
| P24.8 | Other neonatal aspiration |
| P24.80 | Other neonatal aspiration without respiratory symptoms |
| P24.81 | Other neonatal aspiration with respiratory symptoms |
| P24.9 | Neonatal aspiration, unspecified |
| P25 | Interstitial emphysema and related conditions originating in the perinatal period |
| P25.0 | Interstitial emphysema originating in the perinatal period |
| P25.1 | Pneumothorax originating in the perinatal period |
| P25.2 | Pneumomediastinum originating in the perinatal period |
| P25.3 | Pneumopericardium originating in the perinatal period |
| P25.8 | Other conditions related to interstitial emphysema originating in the perinatal period |
| P26 | Pulmonary hemorrhage originating in the perinatal period |
| P26.0 | Tracheobronchial hemorrhage originating in the perinatal period |
| P26.1 | Massive pulmonary hemorrhage originating in the perinatal period |
| P26.8 | Other pulmonary hemorrhages originating in the perinatal period |
| P26.9 | Unspecified pulmonary hemorrhage originating in the perinatal period |
| P27 | Chronic respiratory disease originating in the perinatal period |
| P27.0 | Wilson-Mikity syndrome |
| P27.1 | Bronchopulmonary dysplasia originating in the perinatal period |
| P27.8 | Other chronic respiratory diseases originating in the perinatal period |
| P27.9 | Unspecified chronic respiratory disease originating in the perinatal period |
| P28 | Other respiratory conditions originating in the perinatal period |
| P28.0 | Primary atelectasis of newborn |
| P28.1 | Other and unspecified atelectasis of newborn |
| P28.10 | Unspecified atelectasis of newborn |
| P28.11 | Resorption atelectasis without respiratory distress syndrome |
| P28.19 | Other atelectasis of newborn |
| P28.2 | Cyanotic attacks of newborn |
| P28.3 | Primary sleep apnea of newborn |
| P28.4 | Other apnea of newborn |
| P28.5 | Respiratory failure of newborn |
| P28.8 | Other specified respiratory conditions of newborn |
| P28.81 | Respiratory arrest of newborn |
| P28.89 | Other specified respiratory conditions of newborn |
| P28.9 | Respiratory condition of newborn, unspecified |
| P29 | Cardiovascular disorders originating in the perinatal period |
| P29.0 | Neonatal cardiac failure |
| P29.1 | Neonatal cardiac dysrhythmia |
| P29.11 | Neonatal tachycardia |
| P29.12 | Neonatal bradycardia |
| P29.2 | Neonatal hypertension |
| P29.3 | Persistent fetal circulation |
| P29.4 | Transient myocardial ischemia in newborn |
| P29.8 | Other cardiovascular disorders originating in the perinatal period |
| P29.81 | Cardiac arrest of newborn |
| P29.89 | Other cardiovascular disorders originating in the perinatal period |
| P29.9 | Cardiovascular disorder originating in the perinatal period, unspecified |