0NTR0ZZResection of Maxilla, Open Approach
- Billable / Specific Code
0NTR0ZZ is a billable ICD-10-PCS procedure code for Resection of Maxilla, Open Approach. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to 12 MS-DRGs. The root operation Resection involves cutting out or off, without replacement, all of a body part. In AHRQ's Clinical Classifications Software (CCSR), this procedure falls under Bone excision.
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 | N | Head and Facial Bones |
| 3 | Operation | T | Resection |
| 4 | BodyPart | R | Maxilla |
| 5 | Approach | 0 | Open |
| 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:
To code resection of the maxilla, open the FY 2027 ICD-10-PCS Alphabetic Index at Resection, then the subterm Maxilla. The entry lists 0NTR0ZZ directly as a complete, billable 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.
Questions About 0NTR0ZZ
Is 0NTR0ZZ a billable code?
Yes. This is a complete seven-character ICD-10-PCS code, specific enough to report Resection of Maxilla, Open Approach on inpatient claims from October 1, 2026 through September 30, 2027.
What is the ICD-10-PCS code for resection of the maxilla?
The FY 2027 ICD-10-PCS Alphabetic Index entry Resection, Maxilla is a direct entry for 0NTR0ZZ, Resection of Maxilla, Open Approach, billable on inpatient claims from October 1, 2026 through September 30, 2027.
What do the characters in 0NTR0ZZ mean?
The code breaks down character by character: the 1st character 0 is the Section (Medical and Surgical); the 2nd character N is the Body System (Head and Facial Bones); the 3rd character T is the Operation (Resection); the 4th character R is the BodyPart (Maxilla); the 5th character 0 is the Approach (Open); the 6th character Z is the Device (No Device); the 7th character Z is the Qualifier (No Qualifier).
What MS-DRG does 0NTR0ZZ group to?
On an inpatient stay, Resection of Maxilla, Open Approach maps to MS-DRGs 143, 144, 145, 515, 516, 517, 907, 908, 909, 957, 958, 959, with relative weights from 1.2335 to 7.5502. The MS-DRG sets the fixed Medicare payment for the stay.
What is the ICD-9-PCS equivalent of 0NTR0ZZ?
Under the General Equivalence Mappings, Resection of Maxilla, Open Approach crosswalks to ICD-9-PCS 76.45 (Other total ostectomy of other facial bone). The mapping is approximate, so confirm it fits the documentation.
