Ntrm subarach hemor from left posterior communicating artery

This code signifies a spontaneous bleeding event into the subarachnoid space of the brain, specifically originating from the left posterior communicating artery. This type of hemorrhage is not caused by trauma and often results from a ruptured aneurysm.

Apply this code when documentation clearly states a nontraumatic subarachnoid hemorrhage with the precise anatomical origin identified as the left posterior communicating artery. This diagnosis is typically confirmed by imaging studies such as CT angiography or cerebral angiography.

• Ensure the documentation explicitly states "nontraumatic" or "spontaneous" to differentiate from traumatic subarachnoid hemorrhage.
• Verify the specific artery involved; do not use this code for unspecified arteries or other named arteries.
• Code any associated aneurysm (e.g., I67.1) as an additional diagnosis, if documented.