Brown-Sequard syndrome at C4, init

This code signifies Brown-Sequard syndrome resulting from a lesion at the C4 level of the cervical spinal cord. This syndrome is characterized by hemisection of the spinal cord, leading to ipsilateral motor paralysis and loss of proprioception/vibration sensation, along with contralateral loss of pain and temperature sensation below the level of the lesion.

Use this code for patients presenting with the classic neurological deficits of Brown-Sequard syndrome specifically localized to the C4 spinal cord segment. Documentation should clearly indicate the C4 level involvement and that this is the initial encounter for this condition. This code is appropriate following acute spinal cord injury, tumors, or other lesions causing this specific neurological presentation.

• Ensure documentation explicitly states "Brown-Sequard syndrome" and specifies the C4 level.
• The "A" seventh character indicates an initial encounter; use subsequent characters for follow-up care.
• Always code any underlying cause of the spinal cord lesion (e.g., fracture, tumor) in addition to this code.