4A1074GMonitoring of Central Nervous Electrical Activity, Intraoperative, Via Natural or Artificial Opening
- Billable / Specific Code
4A1074G is a billable ICD-10-PCS procedure code for Monitoring of Central Nervous Electrical Activity, Intraoperative, Via Natural or Artificial Opening. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The root operation Monitoring involves determining the level of a physiological or physical function repetitively over a period of 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 | 1 | Monitoring |
| 4 | BodySystem | 0 | Central Nervous |
| 5 | Approach | 7 | Via Natural or Artificial Opening |
| 6 | Function/Device | 4 | Electrical Activity |
| 7 | Qualifier | G | Intraoperative |
Convert to ICD-9-PCS
Closest ICD-9-PCS equivalents for 4A1074G under the General Equivalence Mappings.
Code History
- 4A1034G — Monitoring of CNS Electr Activity, Intraop, Perc Approach
Similar Procedure Codes
Questions About 4A1074G
Is 4A1074G a billable code?
Yes. 4A1074G is a complete seven-character ICD-10-PCS code, specific enough to report Monitoring of Central Nervous Electrical Activity, Intraoperative, Via Natural or Artificial Opening on inpatient claims from October 1, 2025 through September 30, 2026.
What do the characters in 4A1074G mean?
4A1074G 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 1 is the Operation (Monitoring); the 4th character 0 is the BodySystem (Central Nervous); the 5th character 7 is the Approach (Via Natural or Artificial Opening); the 6th character 4 is the Function/Device (Electrical Activity); the 7th character G is the Qualifier (Intraoperative).
What is the ICD-9-PCS equivalent of 4A1074G?
Under the General Equivalence Mappings, Monitoring of Central Nervous Electrical Activity, Intraoperative, Via Natural or Artificial Opening crosswalks to ICD-9-PCS 94. The mapping is approximate, so confirm it fits the documentation.
