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ICD-10-PCS 2027 procedure code

021L4Z5Bypass Left Ventricle to Coronary Circulation, Percutaneous Endoscopic Approach

✓ Valid for 2027O.R. procedure

Short description: Bypass Left Ventricle to Cor Circ, Perc Endo 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 021L4Z5

021L4Z5 is the ICD-10-PCS code for a bypass procedure on the left ventricle using a percutaneous endoscopic approach (qualifier: coronary circulation). In ICD-10-PCS, bypass means altering the route of passage of the contents of a tubular body part.

In plain terms, this corresponds to other transmyocardial revascularization, the ICD-9-CM procedure title it maps to (36.32).

For a different body part, codes include 021K4Z5 (right ventricle).

The same procedure with a different approach is coded 021L0Z5 (open).

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
1Bypass

Altering the route of passage of the contents of a tubular body part

Rerouting contents of a body part to a downstream area of the normal route, to a similar route and body part, or to an abnormal route and dissimilar body part. Includes one or more anastomoses, with or without the use of a device

Includes: Coronary artery bypass, colostomy formation

4. Body Part
LVentricle, Left
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
5Coronary Circulation

Other versions of this procedure

Different body part

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 →
  • 36.32Other transmyocardial revascularizationapproximate

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 021L4Z5

Is 021L4Z5 a valid ICD-10-PCS code for 2027?

Yes. 021L4Z5 is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 021L4Z5 an O.R. procedure?

Yes. 021L4Z5 is an O.R. procedure in MS-DRG v44.0.

What DRG does 021L4Z5 group to?

Depending on the principal diagnosis, 021L4Z5 can group to MS-DRG 228 and MS-DRG 229.

What is the ICD-9 procedure code for 021L4Z5?

The CMS GEMs map 021L4Z5 to ICD-9-CM 36.32 (Other transmyocardial revascularization).