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ICD-10-PCS 2027 procedure code

00BN0ZXExcision of Acoustic Nerve, Open Approach, Diagnostic

✓ Valid for 2027O.R. procedure

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 00BN0ZX

00BN0ZX is the ICD-10-PCS code for a excision procedure on the acoustic nerve using an open 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 open biopsy of cranial or peripheral nerve or ganglion, the ICD-9-CM procedure title it maps to (04.12).

For a different body part, codes include 00B00ZX (brain), 00B10ZX (cerebral meninges), 00B20ZX (dura mater), 00B60ZX (cerebral ventricle), 00B70ZX (cerebral hemisphere), 00B80ZX (basal ganglia) and 20 more.

The same procedure with a different approach is coded 00BN3ZX (percutaneous) and 00BN4ZX (percutaneous endoscopic).

It is an operating-room procedure in the MS-DRG logic for DRG 040 (Peripheral, Cranial Nerve and Other Nervous System Procedures with MCC), DRG 041 (Peripheral, Cranial Nerve and Other Nervous System Procedures with CC or Peripheral Neurostimulator), DRG 042 (Peripheral, Cranial Nerve and Other Nervous System Procedures without CC/MCC), DRG 143 (Other Ear, Nose, Mouth and Throat O.R. Procedures with MCC), DRG 144 (Other Ear, Nose, Mouth and Throat O.R. Procedures with CC) and DRG 145 (Other Ear, Nose, Mouth and Throat O.R. Procedures without CC/MCC), under the surgical categories “Peripheral, Cranial Nerve and Other Nervous System Procedures”, “Other Ear, Nose, Mouth and Throat O.R. Procedures”, “Other Musculoskeletal System and Connective Tissue O.R. Procedures” and 2 more.

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
0Open

Cutting through the skin or mucous membrane and any other body layers necessary to expose the site of the procedure

6. Device
ZNo Device
7. Qualifier
XDiagnostic

Other versions of this procedure

Different qualifier

MS-DRG v44.0 grouping

All DRGs →

Surgical MS-DRGs this procedure can group to, depending on the principal diagnosis's MDC.

ICD-9-CM equivalent

Converter →
  • 04.12Open 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 00BN0ZX

Is 00BN0ZX a valid ICD-10-PCS code for 2027?

Yes. 00BN0ZX is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 00BN0ZX an O.R. procedure?

Yes. 00BN0ZX is an O.R. procedure in MS-DRG v44.0.

What DRG does 00BN0ZX group to?

Depending on the principal diagnosis, 00BN0ZX can group to MS-DRG 040, MS-DRG 041, MS-DRG 042, MS-DRG 143, MS-DRG 144 and MS-DRG 145.

What is the ICD-9 procedure code for 00BN0ZX?

The CMS GEMs map 00BN0ZX to ICD-9-CM 04.12 (Open biopsy of cranial or peripheral nerve or ganglion).