Skip to content
Dx

ICD-10-PCS 2027 procedure code

02N90ZZRelease Chordae Tendineae, 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 02N90ZZ

02N90ZZ is the ICD-10-PCS code for a release procedure on the chordae tendineae 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 operations on chordae tendineae, the ICD-9-CM procedure title it maps to (35.32).

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 02N93ZZ (percutaneous) and 02N94ZZ (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
9Chordae Tendineae
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 →
  • 35.32Operations on chordae tendineaeapproximate

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 02N90ZZ

Is 02N90ZZ a valid ICD-10-PCS code for 2027?

Yes. 02N90ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 02N90ZZ an O.R. procedure?

Yes. 02N90ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 02N90ZZ group to?

Depending on the principal diagnosis, 02N90ZZ can group to MS-DRG 228 and MS-DRG 229.

What is the ICD-9 procedure code for 02N90ZZ?

The CMS GEMs map 02N90ZZ to ICD-9-CM 35.32 (Operations on chordae tendineae).