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ICD-10-PCS 2027 procedure code

02550ZZDestruction of Atrial Septum, 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 02550ZZ

02550ZZ is the ICD-10-PCS code for a destruction procedure on the atrial septum using an open approach. In ICD-10-PCS, destruction means physical eradication of all or a portion of a body part by the direct use of energy, force, or a destructive agent.

In plain terms, this corresponds to excision or destruction of other lesion or tissue of heart, open approach, the ICD-9-CM procedure title it maps to (37.33).

For a different body part, codes include 02540ZZ (coronary vein), 02560ZZ (right atrium), 02570ZZ (left atrium), 02580ZZ (conduction mechanism), 02590ZZ (chordae tendineae), 025D0ZZ (papillary muscle) and 16 more.

The same procedure with a different approach is coded 02553ZZ (percutaneous) and 02554ZZ (percutaneous endoscopic).

It is an operating-room procedure in the MS-DRG logic for DRG 212 (Concomitant Aortic and Mitral Valve Procedures), DRG 228 (Other Cardiothoracic Procedures with MCC), DRG 229 (Other Cardiothoracic Procedures without MCC), DRG 233 (Coronary Bypass with Cardiac Catheterization or Open Ablation with MCC), DRG 234 (Coronary Bypass with Cardiac Catheterization or Open Ablation without MCC) and DRG 317 (Concomitant Left Atrial Appendage Closure and Cardiac Ablation), under the surgical categories “Concomitant Aortic and Mitral Valve Procedures”, “Other Cardiothoracic Procedures”, “” and 1 more.

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
5Destruction

Physical eradication of all or a portion of a body part by the direct use of energy, force, or a destructive agent

None of the body part is physically taken out

Includes: Fulguration of rectal polyp, cautery of skin lesion

4. Body Part
5Atrial Septum

Includes: Interatrial septum

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
ZNo Qualifier

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 · Concomitant Aortic and Mitral Valve Procedures

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

MDC 05 · Diseases and Disorders of the Circulatory System · Concomitant Left Atrial Appendage Closure and Cardiac Ablation

ICD-9-CM equivalent

Converter →
  • 37.33Excision or destruction of other lesion or tissue of heart, open approachapproximate

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 02550ZZ

Is 02550ZZ a valid ICD-10-PCS code for 2027?

Yes. 02550ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 02550ZZ an O.R. procedure?

Yes. 02550ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 02550ZZ group to?

Depending on the principal diagnosis, 02550ZZ can group to MS-DRG 212, MS-DRG 228, MS-DRG 229, MS-DRG 233, MS-DRG 234 and MS-DRG 317.

What is the ICD-9 procedure code for 02550ZZ?

The CMS GEMs map 02550ZZ to ICD-9-CM 37.33 (Excision or destruction of other lesion or tissue of heart, open approach).