Noninvasive Tests of Carotid Function

NCD212 covers a range of noninvasive tests of carotid function, including specified direct tests (e.g., carotid phonoangiography, direct/spectral bruit analysis, Doppler flow velocity, ultrasound B-scan/Doppler) and indirect orbital/cerebral tests (e.g., periorbital Doppler, oculoplethysmography, ophthalmodynamometry). The listed names are not exhaustive or standardized; acceptability of other or variably named tests is determined by local Medicare contractors or medical consultants. The policy does not specify documentation, diagnostic codes, or frequency limits.

"Carotid phonoangiography (direct test) is an acceptable noninvasive test of carotid function for diagnostic evaluation."

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