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ICD-10-PCS 2027 procedure code

02B50ZXExcision of Atrial Septum, Open Approach, Diagnostic

✓ Valid for 2027

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 02B50ZX

02B50ZX is the ICD-10-PCS code for a excision procedure on the atrial septum using an open approach (qualifier: diagnostic). In ICD-10-PCS, excision means cutting out or off, without replacement, a portion of a body part.

In plain terms, this corresponds to biopsy of heart, the ICD-9-CM procedure title it maps to (37.25).

For a different body part, codes include 02B40ZX (coronary vein), 02B60ZX (right atrium), 02B70ZX (left atrium), 02B80ZX (conduction mechanism), 02B90ZX (chordae tendineae), 02BD0ZX (papillary muscle) and 16 more.

The same procedure with a different approach is coded 02B53ZX (percutaneous) and 02B54ZX (percutaneous endoscopic).

It doesn't appear in the MS-DRG procedure index, so on its own it doesn't change the DRG assignment.

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
BExcision

Cutting out or off, without replacement, a portion of a body part

The qualifier DIAGNOSTIC is used to identify excision procedures that are biopsies

Includes: Partial nephrectomy, liver biopsy

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
XDiagnostic

Other versions of this procedure

Different qualifier

ICD-9-CM equivalent

Converter →
  • 37.25Biopsy of heartapproximate

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 02B50ZX

Is 02B50ZX a valid ICD-10-PCS code for 2027?

Yes. 02B50ZX is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 02B50ZX?

The CMS GEMs map 02B50ZX to ICD-9-CM 37.25 (Biopsy of heart).