021W0ZRBypass Thoracic Aorta, Descending to Left Pulmonary Artery, Open Approach
- Billable / Specific Code
021W0ZR is a billable ICD-10-PCS procedure code for Bypass Thoracic Aorta, Descending to Left Pulmonary Artery, Open Approach. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) 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. In AHRQ's Clinical Classifications Software (CCSR), this procedure falls under Heart and great vessel bypass procedures.
Code Identity
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.
| Position | Designation | Value | Meaning |
|---|---|---|---|
| 1 | Section | 0 | Medical and Surgical |
| 2 | Body System | 2 | Heart and Great Vessels |
| 3 | Operation | 1 | Bypass |
| 4 | BodyPart | W | Thoracic Aorta, Descending |
| 5 | Approach | 0 | Open |
| 6 | Device | Z | No Device |
| 7 | Qualifier | R | Pulmonary Artery, Left |
In the ICD-10-PCS Alphabetic Index
These FY 2027 ICD-10-PCS Alphabetic Index entries lead to this code:
Clinical Classification (CCSR)
AHRQ groups this procedure code into these clinical categories.
Convert to ICD-9-PCS
Closest ICD-9-PCS equivalents for this code under the General Equivalence Mappings.
Code History
- 021X0ZR — Bypass Thor Aorta Asc to L Pulm Art, Open Approach
Similar Procedure Codes
Questions About 021W0ZR
Is 021W0ZR a billable code?
Yes. This is a complete seven-character ICD-10-PCS code, specific enough to report Bypass Thoracic Aorta, Descending to Left Pulmonary Artery, Open Approach on inpatient claims from October 1, 2026 through September 30, 2027.
What do the characters in 021W0ZR mean?
The code 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 W is the BodyPart (Thoracic Aorta, Descending); the 5th character 0 is the Approach (Open); the 6th character Z is the Device (No Device); the 7th character R is the Qualifier (Pulmonary Artery, Left).
What MS-DRG does 021W0ZR group to?
On an inpatient stay, Bypass Thoracic Aorta, Descending to Left Pulmonary Artery, Open Approach maps to MS-DRGs 270, 271, 272, with relative weights from 2.4854 to 5.2665. The MS-DRG sets the fixed Medicare payment for the stay.
What is the ICD-9-PCS equivalent of 021W0ZR?
Under the General Equivalence Mappings, Bypass Thoracic Aorta, Descending to Left Pulmonary Artery, Open Approach crosswalks to ICD-9-PCS 39.0 (Systemic to pulmonary artery shunt). The mapping is approximate, so confirm it fits the documentation.
