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ICD-10-PCS 2027 procedure code

03120ZKBypass Innominate Artery to Left Extracranial Artery, Open Approach

✓ Valid for 2027O.R. procedure

Short description: Bypass Innominate Artery to L Extracran Art, Open 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 03120ZK

03120ZK is the ICD-10-PCS code for a bypass procedure on the innominate artery using an open approach (qualifier: left extracranial artery). 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 (peripheral) vascular shunt or bypass, the ICD-9-CM procedure title it maps to (39.29).

For a different body part, codes include 03130ZK (right subclavian artery), 03140ZK (left subclavian artery), 03150ZK (right axillary artery), 03160ZK (left axillary artery), 031H0ZK (right common carotid artery), 031J0ZK (left common carotid artery) and 4 more.

With a different device, use 031209K (autologous venous tissue), 03120AK (autologous arterial tissue), 03120JK (synthetic substitute) and 03120KK (nonautologous tissue substitute).

It is an operating-room procedure in the MS-DRG logic for DRG 209 (Complex Aortic Arch Procedures), DRG 252 (Other Vascular Procedures with MCC), DRG 253 (Other Vascular Procedures with CC) and DRG 254 (Other Vascular Procedures without CC/MCC), under the surgical categories “Complex Aortic Arch Procedures” and “Other Vascular 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
3Upper Arteries
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
2Innominate Artery

Includes: Brachiocephalic artery; Brachiocephalic trunk

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
KExtracranial Artery, Left

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 · Complex Aortic Arch Procedures

ICD-9-CM equivalent

Converter →
  • 39.29Other (peripheral) vascular shunt or bypassapproximate

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 03120ZK

Is 03120ZK a valid ICD-10-PCS code for 2027?

Yes. 03120ZK is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 03120ZK an O.R. procedure?

Yes. 03120ZK is an O.R. procedure in MS-DRG v44.0.

What DRG does 03120ZK group to?

Depending on the principal diagnosis, 03120ZK can group to MS-DRG 209, MS-DRG 252, MS-DRG 253 and MS-DRG 254.

What is the ICD-9 procedure code for 03120ZK?

The CMS GEMs map 03120ZK to ICD-9-CM 39.29 (Other (peripheral) vascular shunt or bypass).