ICD-10-PCS 2027 procedure code
02NM4ZZRelease Ventricular Septum, Percutaneous Endoscopic Approach
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 02NM4ZZ
02NM4ZZ is the ICD-10-PCS code for a release procedure on the ventricular septum using a percutaneous endoscopic 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 other operations on septa of heart, the ICD-9-CM procedure title it maps to (35.98).
For a different body part, codes include 02N04ZZ (coronary artery, one artery), 02N14ZZ (coronary artery, two arteries), 02N24ZZ (coronary artery, three arteries), 02N34ZZ (coronary artery, four or more arteries), 02N44ZZ (coronary vein), 02N54ZZ (atrial septum) and 20 more.
The same procedure with a different approach is coded 02NM0ZZ (open) and 02NM3ZZ (percutaneous).
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
- MVentricular Septum
Includes: Interventricular septum
- 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
- ZNo Device
- 7. Qualifier
- ZNo Qualifier
Other versions of this procedure
Different body part
- 02N04ZZCoronary Artery, One Artery
- 02N14ZZCoronary Artery, Two Arteries
- 02N24ZZCoronary Artery, Three Arteries
- 02N34ZZCoronary Artery, Four or More Arteries
- 02N44ZZCoronary Vein
- 02N54ZZAtrial Septum
- 02N64ZZAtrium, Right
- 02N74ZZAtrium, Left
- 02N84ZZConduction Mechanism
- 02N94ZZChordae Tendineae
- 02ND4ZZPapillary Muscle
- 02NF4ZZAortic Valve
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 →- 35.98Other operations on septa of heartapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about 02NM4ZZ
Is 02NM4ZZ a valid ICD-10-PCS code for 2027?
- Yes. 02NM4ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.
Is 02NM4ZZ an O.R. procedure?
- Yes. 02NM4ZZ is an O.R. procedure in MS-DRG v44.0.
What DRG does 02NM4ZZ group to?
- Depending on the principal diagnosis, 02NM4ZZ can group to MS-DRG 228 and MS-DRG 229.
What is the ICD-9 procedure code for 02NM4ZZ?
- The CMS GEMs map 02NM4ZZ to ICD-9-CM 35.98 (Other operations on septa of heart).