Updated on: March 16, 2016

ICD-10-PCS Table 4A0: Cardiac Catheterization and Other Measurements

Original story posted on: May 8, 2012

The ICD-10-PCS root operation Table 4A0 classifies procedures and tests that involve measurement, which is defined in ICD-10-PCS as determining the level of a physiological or physical function at a certain point in time.

An ICD-10-PCS code is derived by choosing a specific value for each of the seven characters in the root operation table. Coding specialists must be cautious, however, because the same value placed in a different position in the code would denote something entirely different (i.e. the value “3” in the first character means something different than “3” in the second character or “3” in the third character, and so on). Each charac­ter in the seven-character code represents an aspect of a procedure, as shown in the ICD-10-PCS Table 4A0, which is provided below:



ICD-10-PCS Implementation Exercise: Audit the Documentation found in “Measurement” Reports:

  • Generate a report citing all 2011 inpatient cases that contain any of the “measurement”  ICD-9-CM procedure codes listed above. The report’s data elements should include, at minimum, patient account numbers, discharge dates, the “measurement” ICD-9-CM procedure codes and surgeon names/ID numbers.

Review each operative report or diagnostic study report assigned to a “measurement” ICD-9-CM procedure code and try to re-code the report in ICD-10-PCS (a sample of reports can be used for the high-volume “measurement” services).

  • Document the ICD-10-PCS code assigned to each report, and when appropriate include any comments on why the case could not be coded in ICD-10-PCS (i.e. insufficient documentation).
  • Use the audit findings to educate physicians and other clinicians on the additional level of documentation that will be needed for timely and accurate coding of measurement procedures and tests under ICD-10-PCS.



In order to access the 2012 ICD-10-PCS mapping files, go online to


Under the “Downloads” subheading, scroll down and download the folder titled 2012 Mapping - "ICD-10-PCS to ICD-9-CM" and "ICD-9-CM to ICD-10-PCS"; and User Guide, Reimbursement Guide - Procedures [ZIP, 827KB]

Once the folder is open, you will find several files; you will need the following file to view the ICD-9-CM procedure codes that are mapped to the ICD-10-PCS Table 4A0:

“gem_pcsi9” – This file lists the ICD-10-PCS codes in the first column and the ICD-9-CM procedure codes in the second column.

In order to access the 2012 ICD-10-PCS code book electronic files, go online to http://www.cms.gov/Medicare/Coding/ICD10/2012-ICD-10-PCS.html.

Under the “Downloads” subheading, scroll down and download the folder titled 2012 Code Tables and Index [ZIP, 4MB]

Once the folder is open, you will find several files; you will need the following file:

“pcs_2012.pdf” –    This is the ICD-10-PCS index and root operation tables.

Disclaimer: Every reasonable effort was made to ensure the accuracy of this information at the time it was published. However, due to the nature of industry changes over time we cannot guarantee its validity after the year it was published.
Lolita M. Jones, MSHS, RHIA, CCS

Lolita M. Jones, MSHS, RHIA, CCS has provided Product Consultant services to a warehousing and analytics start-up that developed and marketed decision support software, health outcomes services, and regulatory compliance toolsets. Her goal is to combine her medical coding expertise with data mining-pattern recognition, to help improve data accuracy and compliance in medical coding and reimbursement (i.e., ICD-10-CM, ICD-10-PCS, CPT, HCPCS Level II, modifiers, DRGs, APCs, and eAPGs). Ms. Jones also provides remote and on-site training/consulting in her newly developed Healthcare Data Mining Clinic educational series. She is currently pursuing a Graduate Certificate in Healthcare Data Analytics from a top university. Ms. Jones is based in New York and can be reached at .