Diagnosing and monitoring of reversible cerebral vasoconstriction syndromes or.Detecting severe stenosis in the major basal intra-cranial arteries for members who have neurological signs or symptoms or carotid bruits or.Detecting microemboli in cerebral artery embolism following stroke or transient ischemic attack or.Detecting noncardiac right-to-left shunts or.Detecting arterio-venous malformations (AVMs) and studying their supply arteries and flow patterns or.Assessing stroke risk of children (2 to 16 years of age) with sickle cell anemia (although the optimal time is unknown, accepted guidelines state that re-screening should be considered approximately every 6 months) or.Assessing persons with suspected brain death or.Assessing persons suspected of having patent foramen ovale/paradoxical embolism (symptoms include visual disturbance, weakness, hemiplegia, or slurred speech) or.Assessing patterns and extent of collateral circulation in persons with known regions of severe stenosis or occlusion, including persons with Moyamoya syndrome or.Assessing collateral blood flow and embolization during carotid endarterectomy or.This Clinical Policy Bulletin addresses transcranial doppler ultrasonography.Īetna considers transcranial Doppler ultrasonography (TDU) medically necessary when used for any of the following indications: Number: 0353 Table Of Contents Policy Applicable CPT / HCPCS / ICD-10 Codes Background References
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