ICD 10 Code `4A1004Z`

Monitoring of Central Nervous Electrical Activity, Open Approach
“Monitoring of Central Nervous Electr Activity, Open Approach” for short

2025 Billable Code

4A1004Z is a valid billable ICD-10 procedure code for Monitoring of Central Nervous Electrical Activity, Open Approach. It is found in the 2025 version of the ICD-10 Procedure Coding System (PCS) and can be used in all HIPAA-covered transactions from Oct 01, 2024 - Sep 30, 2025.

Monitoring involves:
Determining the level of a physiological or physical function repetitively over a period of time.

Open approach involves:
Cutting through the skin or mucous membrane and any other body layers necessary to expose the site of the procedure

ICD-10-PCS code structure for 4A1004Z — See Table View

1: Section	`4`	Measurement and Monitoring
2: Body System	`A`	Physiological Systems
3: Root Operation	`1`	Monitoring
4: Body Part	`0`	Central Nervous
5: Approach	`0`	Open
6: Device	`4`	Electrical Activity
7: Qualifier	`Z`	No Qualifier

See also

The ICD-10-PCS Index of common procedure terms.
Measurement and Monitoring terms in the ICD-10-PCS Definitions table. These definitions may also provide additional explanation and/or examples within this section.
The ICD-10-PCS Device Aggregation Table containing entries that correlate a specific ICD-10-PCS device value with a general device value to be used in tables containing only general device values.

ICD 10 Code 4A1004Z

ICD 10 Code `4A1004Z`