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ICD-10-PCS 2027 procedure code

4A1B7BZMonitoring of Gastrointestinal Pressure, Via Natural or Artificial Opening

✓ Valid for 2027

Short description: Monitoring of Gastrointestinal Pressure, Via Opening

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 4A1B7BZ

4A1B7BZ is the ICD-10-PCS code for a monitoring procedure on the gastrointestinal using a via natural or artificial opening approach with pressure. 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 esophageal manometry, the ICD-9-CM procedure title it maps to (89.32).

For a different body part, codes include 4A167BZ (lymphatic), 4A1D7BZ (urinary) and 4A1J7BZ (products of conception, nervous).

The same procedure with a different approach is coded 4A1B8BZ (via natural or artificial opening endoscopic).

With a different device, use 4A1B78Z (motility) and 4A1B7GZ (secretion).

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
BGastrointestinal
5. Approach
7Via Natural or Artificial Opening

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

6. Function / Device
BPressure
7. Qualifier
ZNo Qualifier

Other versions of this procedure

Different function / device

ICD-9-CM equivalent

Converter →
  • 89.32Esophageal manometryapproximate

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 4A1B7BZ

Is 4A1B7BZ a valid ICD-10-PCS code for 2027?

Yes. 4A1B7BZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 4A1B7BZ?

The CMS GEMs map 4A1B7BZ to ICD-9-CM 89.32 (Esophageal manometry).