Ntrm subarach hemorrhage from left middle cerebral artery

This code signifies a spontaneous (nontraumatic) bleeding into the subarachnoid space of the brain, specifically originating from the left middle cerebral artery. This type of hemorrhage is often caused by a ruptured aneurysm, leading to sudden and severe headache, neurological deficits, and potential life-threatening complications.

Apply this code when documentation clearly indicates a subarachnoid hemorrhage that is not due to trauma, and the source is identified as the left middle cerebral artery. This typically follows diagnostic imaging such as CT angiography or cerebral angiography confirming the location of the bleed.

• Ensure documentation explicitly states "nontraumatic" or "spontaneous" to differentiate from traumatic subarachnoid hemorrhage (S06.6-).
• Verify the specific artery involved (left middle cerebral artery) as other codes exist for different arterial sources.
• Code the underlying cause of the hemorrhage, such as a ruptured cerebral aneurysm (I67.1), as an additional diagnosis if known and documented.