4A01X4ZMeasurement of Peripheral Nervous Electrical Activity, External Approach
- Billable / Specific Code
4A01X4Z is a billable ICD-10-PCS procedure code for Measurement of Peripheral Nervous Electrical Activity, External Approach. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The root operation Measurement involves determining the level of a physiological or physical function at a point in time.
Code Identity
PCS Table Breakdown
Each ICD-10-PCS code is built from seven characters, each an axis of the procedure. Hover or tap the icons for the official CMS definitions.
| Position | Designation | Value | Meaning |
|---|---|---|---|
| 1 | Section | 4 | Measurement and Monitoring |
| 2 | Body System | A | Physiological Systems |
| 3 | Operation | 0 | Measurement |
| 4 | BodySystem | 1 | Peripheral Nervous |
| 5 | Approach | X | External |
| 6 | Function/Device | 4 | Electrical Activity |
| 7 | Qualifier | Z | No Qualifier |
Convert to ICD-9-PCS
Closest ICD-9-PCS equivalents for 4A01X4Z under the General Equivalence Mappings.
Similar Procedure Codes
Questions About 4A01X4Z
Is 4A01X4Z a billable code?
Yes. 4A01X4Z is a complete seven-character ICD-10-PCS code, specific enough to report Measurement of Peripheral Nervous Electrical Activity, External Approach on inpatient claims from October 1, 2025 through September 30, 2026.
What do the characters in 4A01X4Z mean?
4A01X4Z breaks down character by character: the 1st character 4 is the Section (Measurement and Monitoring); the 2nd character A is the Body System (Physiological Systems); the 3rd character 0 is the Operation (Measurement); the 4th character 1 is the BodySystem (Peripheral Nervous); the 5th character X is the Approach (External); the 6th character 4 is the Function/Device (Electrical Activity); the 7th character Z is the Qualifier (No Qualifier).
What is the ICD-9-PCS equivalent of 4A01X4Z?
Under the General Equivalence Mappings, Measurement of Peripheral Nervous Electrical Activity, External Approach crosswalks to ICD-9-PCS 89.14. The mapping is approximate, so confirm it fits the documentation.
