ICD-10-PCS 2027 procedure code
03120AYBypass Innominate Artery to Upper Artery with Autologous Arterial Tissue, Open Approach
Short description: Bypass Innom Art to Up Art with Autol Art, 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 03120AY
03120AY is the ICD-10-PCS code for a bypass procedure on the innominate artery using an open approach with autologous arterial tissue (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 031H0AY (right common carotid artery) and 031J0AY (left common carotid artery).
With a different device, use 031209Y (autologous venous tissue), 03120JY (synthetic substitute), 03120KY (nonautologous tissue substitute) and 03120ZY (no device).
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
- AAutologous Arterial Tissue
- 7. Qualifier
- YUpper Artery
Other versions of this procedure
Different body part
Different device
Different qualifier
- 03120A0Upper Arm Artery, Right
- 03120A1Upper Arm Artery, Left
- 03120A2Upper Arm Artery, Bilateral
- 03120A3Lower Arm Artery, Right
- 03120A4Lower Arm Artery, Left
- 03120A5Lower Arm Artery, Bilateral
- 03120A6Upper Leg Artery, Right
- 03120A7Upper Leg Artery, Left
- 03120A8Upper Leg Artery, Bilateral
- 03120A9Lower Leg Artery, Right
- 03120ABLower Leg Artery, Left
- 03120ACLower 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 03120AY
Is 03120AY a valid ICD-10-PCS code for 2027?
- Yes. 03120AY is valid for inpatient procedures from October 1, 2026 through September 30, 2027.
Is 03120AY an O.R. procedure?
- Yes. 03120AY is an O.R. procedure in MS-DRG v44.0.
What DRG does 03120AY group to?
- Depending on the principal diagnosis, 03120AY can group to MS-DRG 209, MS-DRG 252, MS-DRG 253 and MS-DRG 254.