Table 1.

ICD codes for HIE as a secondary source to query candidate patients

ICD-9	Meaning	ICD-10	Meaning
768.70	Hypoxic-ischemic encephalopathy, unspecified	P91.60	Hypoxic ischemic encephalopathy [HIE], unspecified
768.71	Mild hypoxic-ischemic encephalopathy	P91.61	Mild hypoxic ischemic encephalopathy [HIE]
768.72	Moderate hypoxic-ischemic encephalopathy	P91.62	Moderate hypoxic ischemic encephalopathy [HIE]
768.73	Severe hypoxic-ischemic encephalopathy	P91.63	Severe hypoxic ischemic encephalopathy [HIE]
779.2	Cerebral depression, coma, and other abnormal cerebral signs in fetus or newborn	P91.4	Neonatal cerebral depression

Italic plain font for ICD-9 (left half of the table) and italic font for ICD-10 codes (right half of the table)