ICD-10-PCS › 4 Measurement and Monitoring › 4A Physiological Systems › 4A1 Measurement and Monitoring,... › 4A128FZ

Valid for claims with a date of service in the current code year.

Valid FY2018 onwards.

What has happened to this code

What this code says

Each character is read in its own position, so the same letter means different things in different places. Definitions are CMS's own.

3. Root operation Monitoring

Determining the level of a physiological or physical function repetitively over a period of time

5. Approach Via Natural or Artificial Opening Endoscopic

Entry of instrumentation through a natural or artificial external opening to reach and visualize the site of the procedure

Codes in the same group

Code	Description	Status
4A1002Z	Monitoring of Central Nervous Conductivity, Open Approach	Valid
4A1004G	Monitoring of Central Nervous Electrical Activity, Intraoperative, Open Approach	Valid
4A1004Z	Monitoring of Central Nervous Electrical Activity, Open Approach	Valid
4A100BZ	Monitoring of Central Nervous Pressure, Open Approach	Valid
4A1034G	Monitoring of Central Nervous Electrical Activity, Intraoperative, Percutaneous Approach	Valid
4A1034Z	Monitoring of Central Nervous Electrical Activity, Percutaneous Approach	Valid
4A103BD	Monitoring of Intracranial Pressure, Percutaneous Approach	Valid
4A103KD	Monitoring of Intracranial Temperature, Percutaneous Approach	Valid
4A103RD	Monitoring of Intracranial Saturation, Percutaneous Approach	Valid
4A1074G	Monitoring of Central Nervous Electrical Activity, Intraoperative, Via Natural or Artificial Opening	Valid
4A1074Z	Monitoring of Central Nervous Electrical Activity, Via Natural or Artificial Opening	Valid
4A107BD	Monitoring of Intracranial Pressure, Via Natural or Artificial Opening	Valid