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ICD-10-PCS 2027 procedure code

00BJ4ZXExcision of Trochlear Nerve, Percutaneous Endoscopic Approach, Diagnostic

✓ Valid for 2027

Short description: Excision of Trochlear 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 00BJ4ZX

00BJ4ZX is the ICD-10-PCS code for a excision procedure on the trochlear 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 00BJ0ZX (open) and 00BJ3ZX (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
JTrochlear Nerve

Includes: Fourth cranial 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 00BJ4ZX

Is 00BJ4ZX a valid ICD-10-PCS code for 2027?

Yes. 00BJ4ZX is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 00BJ4ZX?

The CMS GEMs map 00BJ4ZX to ICD-9-CM 04.11 (Closed [percutaneous] [needle] biopsy of cranial or peripheral nerve or ganglion).