00BM0ZXExcision of Facial Nerve, Open Approach, Diagnostic
- Billable / Specific Code
00BM0ZX is a billable ICD-10-PCS procedure code for Excision of Facial Nerve, Open Approach, Diagnostic. 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 Excision involves cutting out or off, without replacement, a portion of a body part. In AHRQ's Clinical Classifications Software (CCSR), this procedure falls under CNS excision procedures.
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 | B | Excision |
| 4 | BodyPart | M | Facial Nerve |
| 5 | Approach | 0 | Open |
| 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 excision of the facial nerve, open the FY 2027 ICD-10-PCS Alphabetic Index at Excision, then the subterms Nerve, Facial. The index leads to table 00B, where the approach, device and qualifier values shown in the breakdown above complete the seven-character code 00BM0ZX.
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 00BM0ZX
Is 00BM0ZX a billable code?
Yes. This is a complete seven-character ICD-10-PCS code, specific enough to report Excision of Facial Nerve, Open Approach, Diagnostic on inpatient claims from October 1, 2026 through September 30, 2027.
What do the characters in 00BM0ZX 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 B is the Operation (Excision); the 4th character M is the BodyPart (Facial Nerve); 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 00BM0ZX group to?
On an inpatient stay, Excision of Facial Nerve, Open Approach, Diagnostic maps to MS-DRGs 040, 041, 042, 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 00BM0ZX?
Under the General Equivalence Mappings, Excision of Facial Nerve, Open Approach, Diagnostic crosswalks to ICD-9-PCS 04.12 (Open biopsy of cranial or peripheral nerve or ganglion). The mapping is approximate, so confirm it fits the documentation.
