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ICD-10-PCS 2027 procedure code

021W09QBypass Thoracic Aorta, Descending to Right Pulmonary Artery with Autologous Venous Tissue, Open Approach

✓ Valid for 2027O.R. procedure

Short description: Bypass Thor Aorta Desc to R Pulm Art w Autol Vn, Open

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 021W09Q

021W09Q is the ICD-10-PCS code for a bypass procedure on the thoracic aorta, descending using an open approach with autologous venous tissue (qualifier: right pulmonary artery). 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 021609Q (right atrium), 021709Q (left atrium), 021K09Q (right ventricle), 021L09Q (left ventricle), 021V09Q (superior vena cava) and 021X09Q (thoracic aorta, ascending/arch).

The same procedure with a different approach is coded 021W49Q (percutaneous endoscopic).

With a different device, use 021W08Q (zooplastic tissue), 021W0AQ (autologous arterial tissue), 021W0JQ (synthetic substitute), 021W0KQ (nonautologous tissue substitute) and 021W0ZQ (no device).

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
0Open

Cutting through the skin or mucous membrane and any other body layers necessary to expose the site of the procedure

6. Device
9Autologous Venous Tissue
7. Qualifier
QPulmonary Artery, Right

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 →
  • 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 Right Pulmonary Artery with Autologous Venous Tissue, Open Approach”

Common questions about 021W09Q

Is 021W09Q a valid ICD-10-PCS code for 2027?

Yes. 021W09Q is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 021W09Q an O.R. procedure?

Yes. 021W09Q is an O.R. procedure in MS-DRG v44.0.

What DRG does 021W09Q group to?

Depending on the principal diagnosis, 021W09Q can group to MS-DRG 270, MS-DRG 271 and MS-DRG 272.

What is the ICD-9 procedure code for 021W09Q?

The CMS GEMs map 021W09Q to ICD-9-CM 39.0 (Systemic to pulmonary artery shunt).