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ICD-10-PCS 2027 procedure code

03L04ZZOcclusion of Right Internal Mammary Artery, Percutaneous Endoscopic Approach

✓ Valid for 2027O.R. procedure

Short description: Occlusion of R Int Mamm Art, 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 03L04ZZ

03L04ZZ is the ICD-10-PCS code for a occlusion procedure on the right internal mammary artery using a percutaneous endoscopic approach. In ICD-10-PCS, occlusion means completely closing an orifice or the lumen of a tubular body part.

In plain terms, this corresponds to other surgical occlusion of vessels, thoracic vessels, the ICD-9-CM procedure title it maps to (38.85).

For a different body part, codes include 03L14ZZ (left internal mammary artery), 03L24ZZ (innominate artery), 03L34ZZ (right subclavian artery), 03L44ZZ (left subclavian artery), 03L54ZZ (right axillary artery), 03L64ZZ (left axillary artery) and 23 more.

The same procedure with a different approach is coded 03L00ZZ (open) and 03L03ZZ (percutaneous).

With a different device, use 03L04CZ (extraluminal device) and 03L04DZ (intraluminal device).

It is an operating-room procedure in the MS-DRG logic for DRG 270 (Other Major Cardiovascular Procedures with MCC), DRG 271 (Other Major Cardiovascular Procedures with CC), DRG 272 (Other Major Cardiovascular Procedures without CC/MCC), DRG 907 (Other O.R. Procedures for Injuries with MCC), DRG 908 (Other O.R. Procedures for Injuries with CC) and DRG 909 (Other O.R. Procedures for Injuries without CC/MCC), under the surgical categories “Other Major Cardiovascular Procedures” and “Other O.R. Procedures for Injuries”.

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
3Upper Arteries
3. Operation
LOcclusion

Completely closing an orifice or the lumen of a tubular body part

The orifice can be a natural orifice or an artificially created orifice

Includes: Fallopian tube ligation, ligation of inferior vena cava

4. Body Part
0Internal Mammary Artery, Right
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

MS-DRG v44.0 grouping

All DRGs →

Surgical MS-DRGs this procedure can group to, depending on the principal diagnosis's MDC.

ICD-9-CM equivalent

Converter →
  • 38.85Other surgical occlusion of vessels, thoracic vesselsapproximate

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 03L04ZZ

Is 03L04ZZ a valid ICD-10-PCS code for 2027?

Yes. 03L04ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 03L04ZZ an O.R. procedure?

Yes. 03L04ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 03L04ZZ group to?

Depending on the principal diagnosis, 03L04ZZ can group to MS-DRG 270, MS-DRG 271, MS-DRG 272, MS-DRG 907, MS-DRG 908 and MS-DRG 909.

What is the ICD-9 procedure code for 03L04ZZ?

The CMS GEMs map 03L04ZZ to ICD-9-CM 38.85 (Other surgical occlusion of vessels, thoracic vessels).