009N4ZXDrainage of Acoustic Nerve, Percutaneous Endoscopic Approach, Diagnostic
- Billable / Specific Code
009N4ZX is a billable ICD-10-PCS procedure code for Drainage of Acoustic Nerve, Percutaneous Endoscopic Approach, Diagnostic. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027). The root operation Drainage involves taking or letting out fluids and/or gases from a body part. In AHRQ's Clinical Classifications Software (CCSR), this procedure falls under Minimally invasive CNS biopsy.
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 | 0 | Central Nervous System and Cranial Nerves |
| 3 | Operation | 9 | Drainage |
| 4 | BodyPart | N | Acoustic Nerve |
| 5 | Approach | 4 | Percutaneous Endoscopic |
| 6 | Device | Z | No Device |
| 7 | Qualifier | X | Diagnostic |
In the ICD-10-PCS Alphabetic Index
These FY 2027 ICD-10-PCS Alphabetic Index entries lead to this code:
To code drainage of the acoustic nerve, open the FY 2027 ICD-10-PCS Alphabetic Index at Drainage, then the subterms Nerve, Acoustic. The index leads to table 009, where the approach, device and qualifier values shown in the breakdown above complete the seven-character code 009N4ZX.
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 009N4ZX
Is 009N4ZX a billable code?
Yes. This is a complete seven-character ICD-10-PCS code, specific enough to report Drainage of Acoustic Nerve, Percutaneous Endoscopic Approach, Diagnostic on inpatient claims from October 1, 2026 through September 30, 2027.
What do the characters in 009N4ZX mean?
The code breaks down character by character: the 1st character 0 is the Section (Medical and Surgical); the 2nd character 0 is the Body System (Central Nervous System and Cranial Nerves); the 3rd character 9 is the Operation (Drainage); the 4th character N is the BodyPart (Acoustic Nerve); the 5th character 4 is the Approach (Percutaneous Endoscopic); the 6th character Z is the Device (No Device); the 7th character X is the Qualifier (Diagnostic).
What is the ICD-9-PCS equivalent of 009N4ZX?
Under the General Equivalence Mappings, Drainage of Acoustic Nerve, Percutaneous Endoscopic Approach, Diagnostic crosswalks to ICD-9-PCS 04.11 (Closed [percutaneous] [needle] biopsy of cranial or peripheral nerve or ganglion). The mapping is approximate, so confirm it fits the documentation.
