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ICD-10-PCS/021/021W4ZR
Inpatient Procedure Code

021W4ZR

Bypass Thoracic Aorta, Descending to Left Pulmonary Artery, Percutaneous Endoscopic Approach

Bypass Thor Aorta Desc to L Pulm Art, Perc Endo Approach

Axis Breakdown

Every ICD-10-PCS code is exactly seven characters, one per axis. Each character's meaning is defined by its position in the code.

PositionValueMeaning
1
Section0

Medical and Surgical

2
Body System2

Heart and Great Vessels

3
Root Operation1

Bypass

Altering the route of passage of the contents of a tubular body part

4
Body PartW

Thoracic Aorta, Descending

5
Approach4

Percutaneous Endoscopic

6
DeviceZ

No Device

7
QualifierR

Pulmonary Artery, Left

Potential MS-DRG Relationships (FY2026)

The MS-DRG grouper treats this as an operating room procedure. It appears in the surgical logic of 3 MS-DRGs:

From the CMS MS-DRG Definitions Manual, Appendix E. Actual DRG assignment depends on the complete claim.

Contextual Map

Every relationship of 021W4ZR in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

PCS table

  • 021[PCS table]
  • [object Object] — Section: [object Object] [Section]: “[object Object]”
  • [object Object] — Body System: [object Object] [Body System]: “[object Object]”
  • [object Object] — Operation: [object Object] [Operation]: “[object Object]”

MS-DRG participation

  • DRG 270 — OTHER MAJOR CARDIOVASCULAR PROCEDURES WITH MCC [MS-DRG]: “OTHER MAJOR CARDIOVASCULAR PROCEDURES WITH MCC — Other Major Cardiovascular Procedures (MDC 05)”
  • DRG 271 — OTHER MAJOR CARDIOVASCULAR PROCEDURES WITH CC [MS-DRG]: “OTHER MAJOR CARDIOVASCULAR PROCEDURES WITH CC — Other Major Cardiovascular Procedures (MDC 05)”
  • DRG 272 — OTHER MAJOR CARDIOVASCULAR PROCEDURES WITHOUT CC/MCC [MS-DRG]: “OTHER MAJOR CARDIOVASCULAR PROCEDURES WITHOUT CC/MCC — Other Major Cardiovascular Procedures (MDC 05)”

Nearest codes

  • 02164ZR — Bypass Right Atrium to Left Pulmonary Artery, Percutaneous Endoscopic Approach [One axis away]
  • 02174ZR — Bypass Left Atrium to Left Pulmonary Artery, Percutaneous Endoscopic Approach [One axis away]
  • 021K4ZR — Bypass Right Ventricle to Left Pulmonary Artery, Percutaneous Endoscopic Approach [One axis away]
  • 021L4ZR — Bypass Left Ventricle to Left Pulmonary Artery, Percutaneous Endoscopic Approach [One axis away]
  • 021V4ZR — Bypass Superior Vena Cava to Left Pulmonary Artery, Percutaneous Endoscopic Approach [One axis away]
  • 021W0ZR — Bypass Thoracic Aorta, Descending to Left Pulmonary Artery, Open Approach [One axis away]
  • 021W48R — Bypass Thoracic Aorta, Descending to Left Pulmonary Artery with Zooplastic Tissue, Percutaneous Endoscopic Approach [One axis away]
  • 021W49R — Bypass Thoracic Aorta, Descending to Left Pulmonary Artery with Autologous Venous Tissue, Percutaneous Endoscopic Approach [One axis away]

Change history

No changes recorded for this code — unchanged since the FY2026 (April) baseline of the change ledger.