09990ZXDrainage of Right Auditory Ossicle, Open Approach, Diagnostic
- Billable / Specific Code
09990ZX is a billable ICD-10-PCS procedure code for Drainage of Right Auditory Ossicle, Open Approach, Diagnostic. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRGs 143, 144, 145. The root operation Drainage involves taking or letting out fluids and/or gases from a body part.
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 | 9 | Drainage |
| 4 | BodyPart | 9 | Auditory Ossicle, Right |
| 5 | Approach | 0 | Open |
| 6 | Device | Z | No Device |
| 7 | Qualifier | X | Diagnostic |
Convert to ICD-9-PCS
Closest ICD-9-PCS equivalents for 09990ZX under the General Equivalence Mappings.
Code History
Similar Procedure Codes
Questions About 09990ZX
Is 09990ZX a billable code?
Yes. 09990ZX is a complete seven-character ICD-10-PCS code, specific enough to report Drainage of Right Auditory Ossicle, Open Approach, Diagnostic on inpatient claims from October 1, 2025 through September 30, 2026.
What do the characters in 09990ZX mean?
09990ZX 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 9 is the Operation (Drainage); the 4th character 9 is the BodyPart (Auditory Ossicle, Right); the 5th character 0 is the Approach (Open); the 6th character Z is the Device (No Device); the 7th character X is the Qualifier (Diagnostic).
What MS-DRG does 09990ZX group to?
On an inpatient stay, Drainage of Right Auditory Ossicle, Open Approach, Diagnostic maps to MS-DRGs 143, 144, 145, with relative weights from 1.2023 to 3.7466. The MS-DRG sets the fixed Medicare payment for the stay.
What is the ICD-9-PCS equivalent of 09990ZX?
Under the General Equivalence Mappings, Drainage of Right Auditory Ossicle, Open Approach, Diagnostic crosswalks to ICD-9-PCS 20.32. The mapping is approximate, so confirm it fits the documentation.
