Measurement of Cardiac Rhythm, Via Natural or Artificial Opening

ValidICD-10-PCS procedure code.

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

Valid FY2018 onwards.

What has happened to this code

Every change the publisher made, from 2018 to now.

FY2018 Added to the code set Measurement of Cardiac Rhythm, Via Natural or Artificial Opening

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

Determining the level of a physiological or physical function at a point in time

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

Code	Description	Status
4A0002Z	Measurement of Central Nervous Conductivity, Open Approach	Valid
4A0004Z	Measurement of Central Nervous Electrical Activity, Open Approach	Valid
4A000BZ	Measurement of Central Nervous Pressure, Open Approach	Valid
4A0034Z	Measurement of Central Nervous Electrical Activity, Percutaneous Approach	Valid
4A003BD	Measurement of Intracranial Pressure, Percutaneous Approach	Valid
4A003KD	Measurement of Intracranial Temperature, Percutaneous Approach	Valid
4A003RD	Measurement of Intracranial Saturation, Percutaneous Approach	Valid
4A0074Z	Measurement of Central Nervous Electrical Activity, Via Natural or Artificial Opening	Valid
4A007BD	Measurement of Intracranial Pressure, Via Natural or Artificial Opening	Valid
4A007KD	Measurement of Intracranial Temperature, Via Natural or Artificial Opening	Valid
4A007RD	Measurement of Intracranial Saturation, Via Natural or Artificial Opening	Valid
4A0084Z	Measurement of Central Nervous Electrical Activity, Via Natural or Artificial Opening Endoscopic	Valid

ICD-10-PCS FY2027 code set, published by the Centers for Medicare and Medicaid Services (CMS).

Effective October 1, 2026.