Appendix A. ICD-9 codes.
| Diagnosis | Code | Description |
|---|---|---|
| Maternal | ||
| Abnormal fetal heart rate | 659.71 | Abnormality in fetal heart rate or rhythm, delivered |
| Anxiety | 293.84 | Anxiety disorder in conditions classified elsewhere |
| 300.00 | Anxiety state, unspecified | |
| 300.01 | Panic disorder without agoraphobia | |
| 300.02 | Generalized anxiety disorder | |
| 300.09 | Other anxiety states | |
| Chorioamnionitis | 658.4x | Infection of amniotic cavity |
| Depression | 296.2x | Major depressive disorder, single episode |
| 296.3x | Major depressive disorder, recurrent episode | |
| 311 | Depressive disorder, not otherwise classified | |
| Diabetes, gestational | 648.8x | Abnormal maternal glucose tolerance |
| Diabetes, pregestational | 250.x | Diabetes mellitus |
| 648.0x | Diabetes mellitus of the mother complicating pregnancy | |
| Hypertension, chronic | 401.x | Essential hypertension |
| 402.x | Hypertensive heart disease | |
| 403.x | Hypertensive chronic kidney disease | |
| 404.x | Hypertensive heart and chronic kidney disease | |
| 405.x | Secondary hypertension | |
| 642.0x | Benign essential hypertension complicating pregnancy | |
| 642.1x | Hypertension secondary to renal disease complicating pregnancy | |
| 642.2x | Other preexisting hypertension complicating pregnancy | |
| Hypertension, gestational | 642.3x | Transient hypertension of pregnancy |
| 642.4x | Mild or unspecified preeclampsia | |
| 642.5x | Severe preeclampsia | |
| 642.6x | Eclampsia | |
| 642.7x | Preeclampsia or eclampsia superimposed on preexisting hypertension | |
| 642.9x | Unspecified hypertension complicating pregnancy | |
| Placental abruption | 641.2x | Premature separation of the placenta |
| Postpartum hemorrhage | 666.0x | Third-stage postpartum hemorrhage |
| 666.1x | Other immediate postpartum hemorrhage | |
| 666.2x | Delayed and secondary postpartum hemorrhage | |
| 666.3x | Postpartum coagulation defects | |
| Preterm rupture of membranes | 658.11 | Premature rupture of membranes, delivered, with or without mention of antepartum condition |
| Previous cesarean | 654.21 | Previous cesarean delivery, delivered |
| Severe laceration | 664.2x | Third-degree perineal laceration during delivery |
| 664.3x | Fourth-degree perineal laceration during delivery | |
| Shoulder dystocia | 660.4x | Shoulder (girdle) dystocia during labor and delivery |
| Neonatal | ||
| Abstinence syndrome | 292.0 | Drug withdrawal |
| 779.5 | Drug withdrawal syndrome in newborn | |
| Birth defects | Numerous | http://www.mdch.state.mi.us/pha/osr/CHI/birthdefects/BXDefectCodeGroups.html |
| Encephalopathy | 348.3x | Encephalopathy |
| 768.7x | Hypoxic–ischemic encephalopathy | |
| 779.2 | Cerebral depression, coma, and other abnormal cerebral signs in fetus or newborn | |
| Hypoglycemia | 251.2 | Hypoglycemia, unspecified |
| 775.6 | Neonatal hypoglycemia | |
| Hypoxia | 768.7x | Hypoxic–ischemic encephalopathy |
| 768.9 | Unspecified birth asphyxia in liveborn infant | |
| 770.12 | Meconium aspiration with respiratory symptoms | |
| 770.88 | Hypoxemia of newborn | |
| 775.81 | Other acidosis of newborn | |
| Persistent pulmonary hypertension | 747.83 | Persistent fetal circulation |
| Respiratory failure | V46.11 | Dependence on respirator, status |
| 518.81 | Acute respiratory failure | |
| 518.83 | Chronic respiratory failure | |
| 518.84 | Acute and chronic respiratory failure | |
| 770.84 | Respiratory failure of newborn | |
| 770.87 | Respiratory arrest of newborn | |
| Seizures | 345.x | Epilepsy and recurrent seizures |
| 779.0 | Convulsions in newborn | |
| Sepsis | 038.x | Septicemia |
| 771.81 | Septicemia of newborn | |
| 785.52 | Septic shock | |
| 995.91 | Sepsis | |
| 995.92 | Severe sepsis | |
Abbreviation: ICD-9, International Classification of Diseases, ninth edition.