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ICD-10-PCS 2027 procedure code

021749RBypass Left Atrium to Left Pulmonary Artery with Autologous Venous Tissue, Percutaneous Endoscopic Approach

✓ Valid for 2027O.R. procedure

Short description: Bypass L Atrium to L Pulm Art w Autol Vn, Perc Endo

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 021749R

021749R is the ICD-10-PCS code for a bypass procedure on the left atrium using a percutaneous endoscopic approach with autologous venous tissue (qualifier: left 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 021649R (right atrium), 021K49R (right ventricle), 021L49R (left ventricle), 021V49R (superior vena cava), 021W49R (thoracic aorta, descending) and 021X49R (thoracic aorta, ascending/arch).

The same procedure with a different approach is coded 021709R (open).

With a different device, use 021748R (zooplastic tissue), 02174AR (autologous arterial tissue), 02174JR (synthetic substitute), 02174KR (nonautologous tissue substitute) and 02174ZR (no device).

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
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
9Autologous Venous Tissue
7. Qualifier
RPulmonary Artery, Left

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.

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 021749R

Is 021749R a valid ICD-10-PCS code for 2027?

Yes. 021749R is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 021749R an O.R. procedure?

Yes. 021749R is an O.R. procedure in MS-DRG v44.0.

What DRG does 021749R group to?

Depending on the principal diagnosis, 021749R can group to MS-DRG 228 and MS-DRG 229.

What is the ICD-9 procedure code for 021749R?

The CMS GEMs map 021749R to ICD-9-CM 35.94 (Creation of conduit between atrium and pulmonary artery).