Subarachnoid (nontraumatic) hemorrhage of newborn

This code signifies bleeding into the subarachnoid space surrounding the brain in a newborn, not caused by trauma. This condition often results from hypoxic-ischemic events, prematurity, or underlying vascular malformations, leading to neurological complications.

Apply this code when documentation confirms a spontaneous, non-traumatic subarachnoid hemorrhage in a neonate. This diagnosis is typically supported by neuroimaging (e.g., cranial ultrasound, CT, MRI) demonstrating blood in the subarachnoid space, along with clinical signs such as seizures, apnea, or altered consciousness in the absence of a traumatic birth injury.

• Differentiate from traumatic subarachnoid hemorrhage (P52.0), which has a different etiology.
• Ensure documentation specifies "nontraumatic" or provides sufficient clinical context to rule out trauma.
• Code any associated neurological sequelae or underlying conditions as additional diagnoses.