ICD-10-PCS 2027 procedure code
03120ZYBypass Innominate Artery to Upper Artery, Open Approach
Code last changed in FY2026 (effective October 1, 2025). Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data
About 03120ZY
03120ZY is the ICD-10-PCS code for a bypass procedure on the innominate artery using an open approach (qualifier: upper artery). In ICD-10-PCS, bypass means altering the route of passage of the contents of a tubular body part.
For a different body part, codes include 031H0ZY (right common carotid artery) and 031J0ZY (left common carotid artery).
With a different device, use 031209Y (autologous venous tissue), 03120AY (autologous arterial tissue), 03120JY (synthetic substitute) and 03120KY (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 was added in FY2026, effective October 1, 2025.
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
- YUpper Artery
Other versions of this procedure
Different body part
Different device
Different qualifier
- 03120Z0Upper Arm Artery, Right
- 03120Z1Upper Arm Artery, Left
- 03120Z2Upper Arm Artery, Bilateral
- 03120Z3Lower Arm Artery, Right
- 03120Z4Lower Arm Artery, Left
- 03120Z5Lower Arm Artery, Bilateral
- 03120Z6Upper Leg Artery, Right
- 03120Z7Upper Leg Artery, Left
- 03120Z8Upper Leg Artery, Bilateral
- 03120Z9Lower Leg Artery, Right
- 03120ZBLower Leg Artery, Left
- 03120ZCLower Leg Artery, Bilateral
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
MDC 05 · Diseases and Disorders of the Circulatory System · Other Vascular Procedures
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2026 (effective 10/1/2025): Added
- No changes since FY2026.
Common questions about 03120ZY
Is 03120ZY a valid ICD-10-PCS code for 2027?
- Yes. 03120ZY is valid for inpatient procedures from October 1, 2026 through September 30, 2027.
Is 03120ZY an O.R. procedure?
- Yes. 03120ZY is an O.R. procedure in MS-DRG v44.0.
What DRG does 03120ZY group to?
- Depending on the principal diagnosis, 03120ZY can group to MS-DRG 209, MS-DRG 252, MS-DRG 253 and MS-DRG 254.