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ICD-10-PCS 2027 procedure code

021W4ZPBypass Thoracic Aorta, Descending to Pulmonary Trunk, Percutaneous Endoscopic Approach

✓ Valid for 2027O.R. procedure

Short description: Bypass Thor Aorta Desc to Pulm Trunk, Perc Endo Approach

Code last changed in FY2017 (effective October 1, 2016). Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data

About 021W4ZP

021W4ZP is the ICD-10-PCS code for a bypass procedure on the thoracic aorta, descending using a percutaneous endoscopic approach (qualifier: pulmonary trunk). In ICD-10-PCS, bypass means altering the route of passage of the contents of a tubular body part.

In plain terms, this corresponds to systemic to pulmonary artery shunt, the ICD-9-CM procedure title it maps to (39.0).

For a different body part, codes include 02164ZP (right atrium), 02174ZP (left atrium), 021K4ZP (right ventricle), 021L4ZP (left ventricle), 021V4ZP (superior vena cava) and 021X4ZP (thoracic aorta, ascending/arch).

The same procedure with a different approach is coded 021W0ZP (open).

With a different device, use 021W48P (zooplastic tissue), 021W49P (autologous venous tissue), 021W4AP (autologous arterial tissue), 021W4JP (synthetic substitute) and 021W4KP (nonautologous tissue substitute).

It is an operating-room procedure in the MS-DRG logic for DRG 270 (Other Major Cardiovascular Procedures with MCC), DRG 271 (Other Major Cardiovascular Procedures with CC) and DRG 272 (Other Major Cardiovascular Procedures without CC/MCC), under the surgical category “Other Major Cardiovascular 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
2Heart and Great Vessels
3. Operation
1Bypass

Altering the route of passage of the contents of a tubular body part

Rerouting contents of a body part to a downstream area of the normal route, to a similar route and body part, or to an abnormal route and dissimilar body part. Includes one or more anastomoses, with or without the use of a device

Includes: Coronary artery bypass, colostomy formation

4. Body Part
WThoracic Aorta, Descending
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
ZNo Device
7. Qualifier
PPulmonary Trunk

Other versions of this procedure

Different approach

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 →
  • 39.0Systemic to pulmonary artery shuntapproximate

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)
  • FY2017 (effective 10/1/2016): Title revised — was “Bypass Thoracic Aorta to Pulmonary Trunk, Percutaneous Endoscopic Approach”

Common questions about 021W4ZP

Is 021W4ZP a valid ICD-10-PCS code for 2027?

Yes. 021W4ZP is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 021W4ZP an O.R. procedure?

Yes. 021W4ZP is an O.R. procedure in MS-DRG v44.0.

What DRG does 021W4ZP group to?

Depending on the principal diagnosis, 021W4ZP can group to MS-DRG 270, MS-DRG 271 and MS-DRG 272.

What is the ICD-9 procedure code for 021W4ZP?

The CMS GEMs map 021W4ZP to ICD-9-CM 39.0 (Systemic to pulmonary artery shunt).