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ICD-10-PCS 2027 procedure code

02170ZQBypass Left Atrium to Right Pulmonary Artery, Open Approach

✓ Valid for 2027O.R. procedure

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 02170ZQ

02170ZQ is the ICD-10-PCS code for a bypass procedure on the left atrium using an open approach (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 creation of conduit between atrium and pulmonary artery, the ICD-9-CM procedure title it maps to (35.94).

For a different body part, codes include 02160ZQ (right atrium), 021K0ZQ (right ventricle), 021L0ZQ (left ventricle), 021V0ZQ (superior vena cava), 021W0ZQ (thoracic aorta, descending) and 021X0ZQ (thoracic aorta, ascending/arch).

The same procedure with a different approach is coded 02174ZQ (percutaneous endoscopic).

With a different device, use 021708Q (zooplastic tissue), 021709Q (autologous venous tissue), 02170AQ (autologous arterial tissue), 02170JQ (synthetic substitute) and 02170KQ (nonautologous tissue substitute).

It is an operating-room procedure in the MS-DRG logic for DRG 228 (Other Cardiothoracic Procedures with MCC) and DRG 229 (Other Cardiothoracic Procedures without MCC), under the surgical category “Other Cardiothoracic 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
7Atrium, Left

Includes: Atrium pulmonale; Left auricular appendix

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
ZNo Device
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.

MDC 05 · Diseases and Disorders of the Circulatory System · Other Cardiothoracic Procedures

ICD-9-CM equivalent

Converter →
  • 35.94Creation of conduit between atrium and pulmonary arteryapproximate

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 02170ZQ

Is 02170ZQ a valid ICD-10-PCS code for 2027?

Yes. 02170ZQ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 02170ZQ an O.R. procedure?

Yes. 02170ZQ is an O.R. procedure in MS-DRG v44.0.

What DRG does 02170ZQ group to?

Depending on the principal diagnosis, 02170ZQ can group to MS-DRG 228 and MS-DRG 229.

What is the ICD-9 procedure code for 02170ZQ?

The CMS GEMs map 02170ZQ to ICD-9-CM 35.94 (Creation of conduit between atrium and pulmonary artery).