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CPT Code 95921 – testing of autonomic nervous system function; cardiovagal innervation (parasympathetic function), including 2 or more of the following: heart rate response to deep breathing with recorded R-R interval, Valsalva ratio, and 30:15 ratio. CPT 2013, Standard edition.
CPT Code 95922 – testing of autonomic nervous system function; vasomotor adrenergic innervation (sympathetic adrenergic function), including beat-to-beat blood pressure and R-R interval changes during Valsalva maneuver and at least 5 minutes of passive tilt.
CPT Code 95924 – combined parasympathetic and sympathetic adrenergic function testing with at least 5 minutes of passive tilt.
CPT Code 95943 – simultaneous, independent, quantitative measures of both parasympathetic function and sympathetic function, based on time-frequency analysis of heart rate variability concurrent with time-frequency analysis of continuous respiratory activity, with mean heart rate and blood pressure measures, during rest, paced (deep) breathing, Valsalva maneuvers, and head-up postural change.
CPT Code 93040 – rhythm ECG, one to three leads, with interpretation.
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