0NS504ZReposition Right Temporal Bone with Internal Fixation Device, Open Approach
- Billable / Specific Code
0NS504Z is a billable ICD-10-PCS procedure code for Reposition Right Temporal Bone with Internal Fixation Device, Open Approach. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to 15 MS-DRGs. The root operation Reposition involves moving to its normal location, or other suitable location, all or a portion of a body part. In AHRQ's Clinical Classifications Software (CCSR), this procedure falls under Bone fixation (excluding extremities).
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 | S | Reposition |
| 4 | BodyPart | 5 | Temporal Bone, Right |
| 5 | Approach | 0 | Open |
| 6 | Device | 4 | Internal Fixation 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 elevation of the skull bone fragments, open the FY 2027 ICD-10-PCS Alphabetic Index at Elevation, then the subterms bone fragments, skull. The index leads to table 0NS, where the approach, device and qualifier values shown in the breakdown above complete the seven-character code 0NS504Z.
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 0NS504Z
Is 0NS504Z a billable code?
Yes. This is a complete seven-character ICD-10-PCS code, specific enough to report Reposition Right Temporal Bone with Internal Fixation Device, Open Approach on inpatient claims from October 1, 2026 through September 30, 2027.
What do the characters in 0NS504Z 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 S is the Operation (Reposition); the 4th character 5 is the BodyPart (Temporal Bone, Right); the 5th character 0 is the Approach (Open); the 6th character 4 is the Device (Internal Fixation Device); the 7th character Z is the Qualifier (No Qualifier).
What MS-DRG does 0NS504Z group to?
On an inpatient stay, Reposition Right Temporal Bone with Internal Fixation Device, Open Approach maps to MS-DRGs 023, 024, 025, 026, 027, 143, 144, 145, 515, 516, 517, 907, 908, 909, 955, with relative weights from 1.2335 to 6.5257. The MS-DRG sets the fixed Medicare payment for the stay.
What is the ICD-9-PCS equivalent of 0NS504Z?
Under the General Equivalence Mappings, Reposition Right Temporal Bone with Internal Fixation Device, Open Approach crosswalks to ICD-9-PCS 02.02 (Elevation of skull fracture fragments). The mapping is approximate, so confirm it fits the documentation.
