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ICD-10-PCS 2027 procedure code

02N70ZZRelease Left Atrium, 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 02N70ZZ

02N70ZZ is the ICD-10-PCS code for a release procedure on the left atrium using an open approach. In ICD-10-PCS, release means freeing a body part from an abnormal physical constraint by cutting or by the use of force.

In plain terms, this corresponds to incision of heart, not otherwise specified, the ICD-9-CM procedure title it maps to (37.10).

For a different body part, codes include 02N00ZZ (coronary artery, one artery), 02N10ZZ (coronary artery, two arteries), 02N20ZZ (coronary artery, three arteries), 02N30ZZ (coronary artery, four or more arteries), 02N40ZZ (coronary vein), 02N50ZZ (atrial septum) and 20 more.

The same procedure with a different approach is coded 02N73ZZ (percutaneous) and 02N74ZZ (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
NRelease

Freeing a body part from an abnormal physical constraint by cutting or by the use of force

Some of the restraining tissue may be taken out but none of the body part is taken out

Includes: Adhesiolysis, carpal tunnel release

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
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 →
  • 37.10Incision of heart, not otherwise specifiedapproximate

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 02N70ZZ

Is 02N70ZZ a valid ICD-10-PCS code for 2027?

Yes. 02N70ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 02N70ZZ an O.R. procedure?

Yes. 02N70ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 02N70ZZ group to?

Depending on the principal diagnosis, 02N70ZZ can group to MS-DRG 228 and MS-DRG 229.

What is the ICD-9 procedure code for 02N70ZZ?

The CMS GEMs map 02N70ZZ to ICD-9-CM 37.10 (Incision of heart, not otherwise specified).