4A00X4ZBillable procedure code
Measurement of Central Nervous Electrical Activity, External Approach
Measurement and Monitoring·Physiological Systems·Table 4A0·FY 2027
ICD-10-PCS classifies this procedure as 4A00X4Z: Measurement of Central Nervous Electrical Activity, External Approach. Table 4A0, part of Section 4 (Measurement and Monitoring) contains it. The procedure targets the Physiological Systems body system. The approach used is External.
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What the code means
Measurement: root operation
Determining the level of a physiological or physical function at a point in time
External: approach
Procedures performed directly on the skin or mucous membrane and procedures performed indirectly by the application of external force through the skin or mucous membrane