Severe hypoxic ischemic encephalopathy [HIE]

This code signifies a severe form of brain injury in a newborn resulting from a lack of oxygen and blood flow to the brain, typically occurring around the time of birth. It indicates significant neurological impairment due to the extent of the hypoxic-ischemic insult.

This code is appropriate for neonates diagnosed with severe HIE, characterized by profound neurological signs such as coma, absent reflexes, and severe seizures. Documentation should explicitly state "severe HIE" or describe clinical findings consistent with severe encephalopathy following an hypoxic-ischemic event.

• Ensure documentation clearly specifies the severity as "severe" HIE, as other codes exist for mild and moderate forms.
• Always sequence this code after the underlying cause of the HIE, if known and documented (e.g., birth asphyxia).
• Do not confuse with codes for other types of neonatal encephalopathy not directly caused by hypoxia-ischemia.