1. Home
  2. ICD-10-PCS
  3. 021X4ZA
  4. Share
  5. Feedback

ICD 10 Code 021X4ZA

Bypass Thoracic Aorta, Ascending/Arch to Innominate Artery, Percutaneous Endoscopic Approach
“Bypass Thor Aorta Asc to Innom Art, Perc Endo Approach” for short

021X4ZA is a valid billable ICD-10 procedure code for Bypass Thoracic Aorta, Ascending/Arch to Innominate Artery, Percutaneous Endoscopic Approach. It is found in the 2025 version of the ICD-10 Procedure Coding System (PCS) and can be used in all HIPAA-covered transactions from Oct 01, 2024 - Sep 30, 2025.

Bypass involves:
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

Percutaneous Endoscopic approach involves:
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

Bypass includes:

  • Coronary artery bypass, colostomy formation

Thoracic Aorta, Ascending/Arch body part includes:

  • Aortic arch
  • Aortic isthmus
  • Ascending aorta
  • Juxtaductal aorta
MS-DRG - Medicare Severity-Diagnosis Related Group
  • MDC 01 Diseases & Disorders of the Nervous System
    Extracranial Procedures
    • DRG 037 - EXTRACRANIAL PROCEDURES WITH MCC
    • DRG 038 - EXTRACRANIAL PROCEDURES WITH CC
    • DRG 039 - EXTRACRANIAL PROCEDURES WITHOUT CC/MCC
  • MDC 05 Diseases & Disorders of the Circulatory System
    Other Major Cardiovascular Procedures
    • 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
  • MDC 21 Injuries, Poisonings & Toxic Effects of Drugs
    Other O.R. Procedures for Injuries
    • DRG 907 - OTHER O.R. PROCEDURES FOR INJURIES WITH MCC
    • DRG 908 - OTHER O.R. PROCEDURES FOR INJURIES WITH CC
    • DRG 909 - OTHER O.R. PROCEDURES FOR INJURIES WITHOUT CC/MCC
  • MDC 24 Multiple Significant Trauma
    Other Procedures for Multiple Significant Trauma
    • DRG 957 - OTHER O.R. PROCEDURES FOR MULTIPLE SIGNIFICANT TRAUMA WITH MCC
    • DRG 958 - OTHER O.R. PROCEDURES FOR MULTIPLE SIGNIFICANT TRAUMA WITH CC
    • DRG 959 - OTHER O.R. PROCEDURES FOR MULTIPLE SIGNIFICANT TRAUMA WITHOUT CC/MCC

ICD-10-PCS code structure for 021X4ZA — See Table View

1: Section 0 Medical and Surgical
2: Body System 2 Heart and Great Vessels
3: Root Operation 1 Bypass
4: Body Part X Thoracic Aorta, Ascending/Arch
5: Approach 4 Percutaneous Endoscopic
6: Device Z No Device
7: Qualifier A Innominate Artery

See also

  • The ICD-10-PCS Index of common procedure terms.
  • Medical and Surgical terms in the ICD-10-PCS Definitions table. These definitions may also provide additional explanation and/or examples within this section.
  • The ICD-10-PCS Device Aggregation Table containing entries that correlate a specific ICD-10-PCS device value with a general device value to be used in tables containing only general device values.