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ICD-10-PCS 2027 procedure code

0WHH4YZInsertion of Other Device into Retroperitoneum, Percutaneous Endoscopic Approach

✓ Valid for 2027O.R. procedure

Short description: Insert of Oth Dev into Retroperitoneum, 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 0WHH4YZ

0WHH4YZ is the ICD-10-PCS code for a insertion procedure on the retroperitoneum using a percutaneous endoscopic approach with other device. In ICD-10-PCS, insertion means putting in a nonbiological appliance that monitors, assists, performs, or prevents a physiological function but does not physically take the place of a body part.

In plain terms, this corresponds to incision of peritoneum, the ICD-9-CM procedure title it maps to (54.95).

For a different body part, codes include 0WH04YZ (head), 0WH14YZ (cranial cavity), 0WH24YZ (face), 0WH34YZ (oral cavity and throat), 0WH44YZ (upper jaw), 0WH54YZ (lower jaw) and 16 more.

The same procedure with a different approach is coded 0WHH0YZ (open) and 0WHH3YZ (percutaneous).

With a different device, use 0WHH41Z (radioactive element) and 0WHH43Z (infusion device).

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) and DRG 358 (Other Digestive System O.R. Procedures without CC/MCC), under the surgical category “Other Digestive System O.R. Procedures”.

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

What each character means

1. Section
0Medical and Surgical
2. Body System
WAnatomical Regions, General
3. Operation
HInsertion

Putting in a nonbiological appliance that monitors, assists, performs, or prevents a physiological function but does not physically take the place of a body part

Includes: Insertion of radioactive implant, insertion of central venous catheter

4. Body Part
HRetroperitoneum

Includes: Retroperitoneal cavity; Retroperitoneal space

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. Device
YOther Device

Includes: Alfapump(R) system

7. Qualifier
ZNo Qualifier

Other versions of this procedure

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 →
  • 54.95Incision of peritoneumapproximate

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 0WHH4YZ

Is 0WHH4YZ a valid ICD-10-PCS code for 2027?

Yes. 0WHH4YZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0WHH4YZ an O.R. procedure?

Yes. 0WHH4YZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 0WHH4YZ group to?

Depending on the principal diagnosis, 0WHH4YZ can group to MS-DRG 356, MS-DRG 357 and MS-DRG 358.

What is the ICD-9 procedure code for 0WHH4YZ?

The CMS GEMs map 0WHH4YZ to ICD-9-CM 54.95 (Incision of peritoneum).