03L03ZZOcclusion of Right Internal Mammary Artery, Percutaneous Approach
- Billable / Specific Code
03L03ZZ is a billable ICD-10-PCS procedure code for Occlusion of Right Internal Mammary Artery, Percutaneous Approach. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to 6 MS-DRGs. The root operation Occlusion involves completely closing an orifice or the lumen of a tubular body part. In AHRQ's Clinical Classifications Software (CCSR), this procedure falls under Ligation and embolization of vessels.
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 | 3 | Upper Arteries |
| 3 | Operation | L | Occlusion |
| 4 | BodyPart | 0 | Internal Mammary Artery, Right |
| 5 | Approach | 3 | Percutaneous |
| 6 | Device | Z | No Device |
| 7 | Qualifier | Z | No Qualifier |
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.
Similar Procedure Codes
Questions About 03L03ZZ
Is 03L03ZZ a billable code?
Yes. This is a complete seven-character ICD-10-PCS code, specific enough to report Occlusion of Right Internal Mammary Artery, Percutaneous Approach on inpatient claims from October 1, 2026 through September 30, 2027.
What do the characters in 03L03ZZ mean?
The code breaks down character by character: the 1st character 0 is the Section (Medical and Surgical); the 2nd character 3 is the Body System (Upper Arteries); the 3rd character L is the Operation (Occlusion); the 4th character 0 is the BodyPart (Internal Mammary Artery, Right); the 5th character 3 is the Approach (Percutaneous); the 6th character Z is the Device (No Device); the 7th character Z is the Qualifier (No Qualifier).
What MS-DRG does 03L03ZZ group to?
On an inpatient stay, Occlusion of Right Internal Mammary Artery, Percutaneous Approach maps to MS-DRGs 270, 271, 272, 907, 908, 909, with relative weights from 1.3810 to 5.2665. The MS-DRG sets the fixed Medicare payment for the stay.
What is the ICD-9-PCS equivalent of 03L03ZZ?
Under the General Equivalence Mappings, Occlusion of Right Internal Mammary Artery, Percutaneous Approach crosswalks to ICD-9-PCS 38.85 (Other surgical occlusion of vessels, thoracic vessels). The mapping is approximate, so confirm it fits the documentation.
