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ICD-10-PCS 2027 procedure code

021749SBypass Left Atrium to Right Pulmonary Vein with Autologous Venous Tissue, Percutaneous Endoscopic Approach

✓ Valid for 2027O.R. procedure

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

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 021749S

021749S is the ICD-10-PCS code for a bypass procedure on the left atrium using a percutaneous endoscopic approach with autologous venous tissue (qualifier: right pulmonary vein). 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 total repair of total anomalous pulmonary venous connection, the ICD-9-CM procedure title it maps to (35.82).

For a different body part, codes include 021V49S (superior vena cava).

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

With a different device, use 021748S (zooplastic tissue), 02174AS (autologous arterial tissue), 02174JS (synthetic substitute), 02174KS (nonautologous tissue substitute) and 02174ZS (no device).

It is an operating-room procedure in the MS-DRG logic for DRG 228 (Other Cardiothoracic Procedures with MCC), DRG 229 (Other Cardiothoracic Procedures without MCC), DRG 907 (Other O.R. Procedures for Injuries with MCC), DRG 908 (Other O.R. Procedures for Injuries with CC), DRG 909 (Other O.R. Procedures for Injuries without CC/MCC) and DRG 957 (Other O.R. Procedures for Multiple Significant Trauma with MCC), under the surgical categories “Other Cardiothoracic Procedures”, “Other O.R. Procedures for Injuries” and “Other O.R. Procedures for Multiple Significant Trauma”.

It was added in FY2017, effective October 1, 2016.

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
SPulmonary Vein, Right

Other versions of this procedure

Different body part

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 →
  • 35.82Total repair of total anomalous pulmonary venous connectionapproximate

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
  • FY2017 (effective 10/1/2016): Added
  • No changes since FY2017.

Common questions about 021749S

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

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

Is 021749S an O.R. procedure?

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

What DRG does 021749S group to?

Depending on the principal diagnosis, 021749S can group to MS-DRG 228, MS-DRG 229, MS-DRG 907, MS-DRG 908, MS-DRG 909 and MS-DRG 957.

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

The CMS GEMs map 021749S to ICD-9-CM 35.82 (Total repair of total anomalous pulmonary venous connection).