021X4ZRBypass Thoracic Aorta, Ascending/Arch to Left Pulmonary Artery, Percutaneous Endoscopic Approach

Medical and Surgical›Heart and Great Vessels›Bypass
  • Billable / Specific Code
ICD-10-PCS 021X4ZR
CMS Source: FY 2026 ICD-10-PCS dataset. Effective Oct 1, 2025 – Sep 30, 2026.FacebookXLinkedInPrint

021X4ZR is a billable ICD-10-PCS procedure code for Bypass Thoracic Aorta, Ascending/Arch to Left Pulmonary Artery, Percutaneous Endoscopic Approach. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRGs 270, 271, 272. The root operation Bypass involves altering the route of passage of the contents of a tubular body part.

Code Identity

ICD-10-PCS Code
021X4ZR
Billable Status
Yes — Valid for Submission
Code Describes
Bypass Thoracic Aorta, Ascending/Arch to Left Pulmonary Artery, Percutaneous Endoscopic Approach
Parent Code
021
Short Description
Bypass Thor Aorta Asc to L Pulm Art, Perc Endo Approach

PCS Table Breakdown

Each ICD-10-PCS code is built from seven characters, each an axis of the procedure. Hover or tap the icons for the official CMS definitions.

PositionDesignationValueMeaning
1Section0Medical and Surgical
2Body System2Heart and Great Vessels
3Operation1Bypass
4BodyPartXThoracic Aorta, Ascending/Arch
5Approach4Percutaneous Endoscopic
6DeviceZNo Device
7QualifierRPulmonary Artery, Left

Convert to ICD-9-PCS

Closest ICD-9-PCS equivalents for 021X4ZR under the General Equivalence Mappings.

39.0
Approximate match.

Code History

Replaces previously assigned code(s):
  • 021W4ZR — Bypass Thor Aorta Desc to L Pulm Art, Perc Endo Approach

Similar Procedure Codes

Questions About 021X4ZR

Is 021X4ZR a billable code?

Yes. 021X4ZR is a complete seven-character ICD-10-PCS code, specific enough to report Bypass Thoracic Aorta, Ascending/Arch to Left Pulmonary Artery, Percutaneous Endoscopic Approach on inpatient claims from October 1, 2025 through September 30, 2026.

What do the characters in 021X4ZR mean?

021X4ZR breaks down character by character: the 1st character 0 is the Section (Medical and Surgical); the 2nd character 2 is the Body System (Heart and Great Vessels); the 3rd character 1 is the Operation (Bypass); the 4th character X is the BodyPart (Thoracic Aorta, Ascending/Arch); the 5th character 4 is the Approach (Percutaneous Endoscopic); the 6th character Z is the Device (No Device); the 7th character R is the Qualifier (Pulmonary Artery, Left).

What MS-DRG does 021X4ZR group to?

On an inpatient stay, Bypass Thoracic Aorta, Ascending/Arch to Left Pulmonary Artery, Percutaneous Endoscopic Approach maps to MS-DRGs 270, 271, 272, with relative weights from 2.5530 to 5.2763. The MS-DRG sets the fixed Medicare payment for the stay.

What is the ICD-9-PCS equivalent of 021X4ZR?

Under the General Equivalence Mappings, Bypass Thoracic Aorta, Ascending/Arch to Left Pulmonary Artery, Percutaneous Endoscopic Approach crosswalks to ICD-9-PCS 39.0. The mapping is approximate, so confirm it fits the documentation.