Nontraumatic acute subdural hemorrhage

This code signifies a sudden onset of bleeding into the subdural space, located between the dura mater and arachnoid mater, that is not caused by external trauma. It results in a collection of blood that can compress the brain, leading to neurological deficits.

Apply this code when documentation clearly states "nontraumatic acute subdural hemorrhage" or similar phrasing indicating a spontaneous, rapid accumulation of blood in the subdural space without a traumatic etiology. Supporting documentation often includes imaging reports (CT or MRI) confirming the hemorrhage and its acute nature, along with physician notes ruling out trauma.

• Differentiate carefully between acute, subacute, and chronic subdural hemorrhages; this code is specific to acute.
• Ensure the documentation explicitly states "nontraumatic" or provides sufficient detail to rule out trauma.
• Do not confuse with I60.- (nontraumatic subarachnoid hemorrhage) or I61.- (nontraumatic intracerebral hemorrhage).