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ICD-10-PCS 2027 procedure code

4A0C8BZMeasurement of Biliary Pressure, Via Natural or Artificial Opening Endoscopic

✓ Valid for 2027

Short description: Measurement of Biliary Pressure, Endo

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 4A0C8BZ

4A0C8BZ is the ICD-10-PCS code for a measurement procedure on the biliary using a via natural or artificial opening endoscopic approach with pressure. In ICD-10-PCS, measurement means determining the level of a physiological or physical function at a point in time.

In plain terms, this corresponds to pressure measurement of sphincter of Oddi, the ICD-9-CM procedure title it maps to (51.15).

For a different body part, codes include 4A068BZ (lymphatic), 4A0B8BZ (gastrointestinal), 4A0D8BZ (urinary) and 4A0J8BZ (products of conception, nervous).

The same procedure with a different approach is coded 4A0C3BZ (percutaneous), 4A0C4BZ (percutaneous endoscopic) and 4A0C7BZ (via natural or artificial opening).

With a different device, use 4A0C85Z (flow).

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
0Measurement

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

4. Body System
CBiliary
5. Approach
8Via Natural or Artificial Opening Endoscopic

Entry of instrumentation through a natural or artificial external opening to reach and visualize 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 →
  • 51.15Pressure measurement of sphincter of Oddiapproximate

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 4A0C8BZ

Is 4A0C8BZ a valid ICD-10-PCS code for 2027?

Yes. 4A0C8BZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 4A0C8BZ?

The CMS GEMs map 4A0C8BZ to ICD-9-CM 51.15 (Pressure measurement of sphincter of Oddi).