Skip to content
Dx

ICD-10-PCS 2027 procedure code

4A0C45ZMeasurement of Biliary Flow, Percutaneous Endoscopic Approach

✓ Valid for 2027O.R. procedure

Short description: Measurement of Biliary Flow, Perc Endo 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 4A0C45Z

4A0C45Z is the ICD-10-PCS code for a measurement procedure on the biliary using a percutaneous endoscopic approach with flow. 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 other diagnostic procedures on biliary tract, the ICD-9-CM procedure title it maps to (51.19).

The same procedure with a different approach is coded 4A0C35Z (percutaneous), 4A0C75Z (via natural or artificial opening) and 4A0C85Z (via natural or artificial opening endoscopic).

With a different device, use 4A0C4BZ (pressure).

It is an operating-room procedure in the MS-DRG logic for DRG 356 (Other Digestive System O.R. Procedures with MCC), DRG 357 (Other Digestive System O.R. Procedures with CC), DRG 358 (Other Digestive System O.R. Procedures without CC/MCC), DRG 420 (Hepatobiliary Diagnostic Procedures with MCC), DRG 421 (Hepatobiliary Diagnostic Procedures with CC) and DRG 422 (Hepatobiliary Diagnostic Procedures without CC/MCC), under the surgical categories “Other Digestive System O.R. Procedures” and “Hepatobiliary Diagnostic Procedures”.

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
4Percutaneous Endoscopic

Entry, by puncture or minor incision, of instrumentation through the skin or mucous membrane and any other body layers necessary to reach and visualize the site of the procedure

6. Function / Device
5Flow
7. Qualifier
ZNo Qualifier

Other versions of this procedure

Different function / device

MS-DRG v44.0 grouping

All DRGs →

Surgical MS-DRGs this procedure can group to, depending on the principal diagnosis's MDC.

ICD-9-CM equivalent

Converter →
  • 51.19Other diagnostic procedures on biliary tractapproximate

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 4A0C45Z

Is 4A0C45Z a valid ICD-10-PCS code for 2027?

Yes. 4A0C45Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 4A0C45Z an O.R. procedure?

Yes. 4A0C45Z is an O.R. procedure in MS-DRG v44.0.

What DRG does 4A0C45Z group to?

Depending on the principal diagnosis, 4A0C45Z can group to MS-DRG 356, MS-DRG 357, MS-DRG 358, MS-DRG 420, MS-DRG 421 and MS-DRG 422.

What is the ICD-9 procedure code for 4A0C45Z?

The CMS GEMs map 4A0C45Z to ICD-9-CM 51.19 (Other diagnostic procedures on biliary tract).