09TC0ZZResection of Left Mastoid Sinus, Open Approach
- Billable / Specific Code
09TC0ZZ is a billable ICD-10-PCS procedure code for Resection of Left Mastoid Sinus, Open Approach. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRGs 135, 136. 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 Nasal and sinus 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 | 9 | Ear, Nose, Sinus |
| 3 | Operation | T | Resection |
| 4 | BodyPart | C | Mastoid Sinus, Left |
| 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 left mastoid sinus, open the FY 2027 ICD-10-PCS Alphabetic Index at Resection, then the subterms Sinus, Mastoid, Left. The index leads to table 09T, where the approach, device and qualifier values shown in the breakdown above complete the seven-character code 09TC0ZZ.
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 09TC0ZZ
Is 09TC0ZZ a billable code?
Yes. This is a complete seven-character ICD-10-PCS code, specific enough to report Resection of Left Mastoid Sinus, Open Approach on inpatient claims from October 1, 2026 through September 30, 2027.
What do the characters in 09TC0ZZ mean?
The code breaks down character by character: the 1st character 0 is the Section (Medical and Surgical); the 2nd character 9 is the Body System (Ear, Nose, Sinus); the 3rd character T is the Operation (Resection); the 4th character C is the BodyPart (Mastoid Sinus, Left); 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 09TC0ZZ group to?
On an inpatient stay, Resection of Left Mastoid Sinus, Open Approach maps to MS-DRGs 135, 136, with relative weights from 1.0615 to 2.1793. The MS-DRG sets the fixed Medicare payment for the stay.
What is the ICD-9-PCS equivalent of 09TC0ZZ?
Under the General Equivalence Mappings, Resection of Left Mastoid Sinus, Open Approach crosswalks to ICD-9-PCS 20.42 (Radical mastoidectomy). The mapping is approximate, so confirm it fits the documentation.
