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ICD-10-PCS 2027 procedure code

02Q50ZZRepair 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 02Q50ZZ

02Q50ZZ is the ICD-10-PCS code for a repair procedure on the atrial septum using an open approach. In ICD-10-PCS, repair means restoring, to the extent possible, a body part to its normal anatomic structure and function.

In plain terms, this corresponds to other and unspecified repair of atrial septal defect, the ICD-9-CM procedure title it maps to (35.71).

For a different body part, codes include 02Q00ZZ (coronary artery, one artery), 02Q10ZZ (coronary artery, two arteries), 02Q20ZZ (coronary artery, three arteries), 02Q30ZZ (coronary artery, four or more arteries), 02Q40ZZ (coronary vein), 02Q60ZZ (right atrium) and 23 more.

The same procedure with a different approach is coded 02Q53ZZ (percutaneous) and 02Q54ZZ (percutaneous endoscopic).

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
QRepair

Restoring, to the extent possible, a body part to its normal anatomic structure and function

Used only when the method to accomplish the repair is not one of the other root operations

Includes: Colostomy takedown, suture of laceration

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 · Other Cardiothoracic Procedures

ICD-9-CM equivalent

Converter →
  • 35.71Other and unspecified repair of atrial septal defectapproximate

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 02Q50ZZ

Is 02Q50ZZ a valid ICD-10-PCS code for 2027?

Yes. 02Q50ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 02Q50ZZ an O.R. procedure?

Yes. 02Q50ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 02Q50ZZ group to?

Depending on the principal diagnosis, 02Q50ZZ can group to MS-DRG 228 and MS-DRG 229.

What is the ICD-9 procedure code for 02Q50ZZ?

The CMS GEMs map 02Q50ZZ to ICD-9-CM 35.71 (Other and unspecified repair of atrial septal defect).