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ICD-10-PCS 2027 procedure code

00BN4ZXExcision of Acoustic Nerve, Percutaneous Endoscopic Approach, Diagnostic

✓ Valid for 2027

Short description: Excision of Acoustic Nerve, Perc Endo Approach, Diagn

Code unchanged since ICD-10-PCS took effect on October 1, 2015. Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data

About 00BN4ZX

00BN4ZX is the ICD-10-PCS code for a excision procedure on the acoustic nerve using a percutaneous endoscopic approach (qualifier: diagnostic). In ICD-10-PCS, excision means cutting out or off, without replacement, a portion of a body part.

In plain terms, this corresponds to closed [percutaneous] [needle] biopsy of cranial or peripheral nerve or ganglion, the ICD-9-CM procedure title it maps to (04.11).

For a different body part, codes include 00B04ZX (brain), 00B14ZX (cerebral meninges), 00B24ZX (dura mater), 00B64ZX (cerebral ventricle), 00B74ZX (cerebral hemisphere), 00B84ZX (basal ganglia) and 20 more.

The same procedure with a different approach is coded 00BN0ZX (open) and 00BN3ZX (percutaneous).

It doesn't appear in the MS-DRG procedure index, so on its own it doesn't change the DRG assignment.

It has been valid since ICD-10-PCS took effect on October 1, 2015.

What each character means

1. Section
0Medical and Surgical
2. Body System
0Central Nervous System and Cranial Nerves
3. Operation
BExcision

Cutting out or off, without replacement, a portion of a body part

The qualifier DIAGNOSTIC is used to identify excision procedures that are biopsies

Includes: Partial nephrectomy, liver biopsy

4. Body Part
NAcoustic Nerve

Includes: Cochlear nerve; Eighth cranial nerve; Scarpa's (vestibular) ganglion; Spiral ganglion; Vestibular (Scarpa's) ganglion; Vestibular nerve; Vestibulocochlear nerve

5. Approach
4Percutaneous Endoscopic

Entry, by puncture or minor incision, of instrumentation through the skin or mucous membrane and any other body layers necessary to reach and visualize the site of the procedure

6. Device
ZNo Device
7. Qualifier
XDiagnostic

Other versions of this procedure

Different qualifier

ICD-9-CM equivalent

Converter →
  • 04.11Closed [percutaneous] [needle] biopsy of cranial or peripheral nerve or ganglionapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about 00BN4ZX

Is 00BN4ZX a valid ICD-10-PCS code for 2027?

Yes. 00BN4ZX is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 00BN4ZX?

The CMS GEMs map 00BN4ZX to ICD-9-CM 04.11 (Closed [percutaneous] [needle] biopsy of cranial or peripheral nerve or ganglion).