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ICD-10-PCS 2027 procedure code

4A1HXFZMonitoring of Products of Conception, Cardiac Rhythm, External Approach

✓ Valid for 2027Female only

Short description: Monitoring of POC, Cardiac Rhythm, Extern Approach

Code unchanged since ICD-10-PCS took effect on October 1, 2015. Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data

About 4A1HXFZ

4A1HXFZ is the ICD-10-PCS code for a monitoring procedure on the products of conception, cardiac using an external approach with rhythm. In ICD-10-PCS, monitoring means determining the level of a physiological or physical function repetitively over a period of time.

In plain terms, this corresponds to other fetal monitoring, the ICD-9-CM procedure title it maps to (75.34).

For a different body part, codes include 4A12XFZ (cardiac).

The same procedure with a different approach is coded 4A1H7FZ (via natural or artificial opening) and 4A1H8FZ (via natural or artificial opening endoscopic).

With a different device, use 4A1HX4Z (electrical activity), 4A1HXCZ (rate) and 4A1HXHZ (sound).

It doesn't appear in the MS-DRG procedure index, so on its own it doesn't change the DRG assignment.

It has been valid since ICD-10-PCS took effect on October 1, 2015.

What each character means

1. Section
4Measurement and Monitoring
2. Body System
APhysiological Systems
3. Operation
1Monitoring

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

4. Body System
HProducts of Conception, Cardiac
5. Approach
XExternal

Procedures performed directly on the skin or mucous membrane and procedures performed indirectly by the application of external force through the skin or mucous membrane

6. Function / Device
FRhythm
7. Qualifier
ZNo Qualifier

Other versions of this procedure

Different body system

ICD-9-CM equivalent

Converter →
  • 75.34Other fetal monitoringapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about 4A1HXFZ

Is 4A1HXFZ a valid ICD-10-PCS code for 2027?

Yes. 4A1HXFZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 4A1HXFZ?

The CMS GEMs map 4A1HXFZ to ICD-9-CM 75.34 (Other fetal monitoring).