Skip to content
Dx

ICD-10-PCS 2027 procedure code

0NB64ZZExcision of Left Temporal Bone, Percutaneous Endoscopic Approach

✓ Valid for 2027O.R. procedure

Short description: Excision of Left Temporal Bone, Perc Endo Approach

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 0NB64ZZ

0NB64ZZ is the ICD-10-PCS code for a excision procedure on the left temporal bone using a percutaneous endoscopic approach. In ICD-10-PCS, excision means cutting out or off, without replacement, a portion of a body part.

In plain terms, this corresponds to other craniectomy and excision of lesion of skull, the ICD-9-CM procedure titles it maps to (01.25 and 01.6).

For a different body part, codes include 0NB04ZZ (skull), 0NB14ZZ (frontal bone), 0NB34ZZ (right parietal bone), 0NB44ZZ (left parietal bone), 0NB54ZZ (right temporal bone), 0NB74ZZ (occipital bone) and 16 more.

The same procedure with a different approach is coded 0NB60ZZ (open) and 0NB63ZZ (percutaneous).

It is an operating-room procedure in the MS-DRG logic for DRG 023 (Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis with MCC or Antineoplastic Implant or Epilepsy with Neurostimulator), DRG 024 (Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis without MCC), DRG 025 (Craniotomy and Endovascular Intracranial Procedures with MCC), DRG 026 (Craniotomy and Endovascular Intracranial Procedures with CC), DRG 027 (Craniotomy and Endovascular Intracranial Procedures without CC/MCC) and DRG 143 (Other Ear, Nose, Mouth and Throat O.R. Procedures with MCC), under the surgical categories “Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis”, “Craniotomy and endovascular intracranial procedures”, “Other Ear, Nose, Mouth and Throat O.R. Procedures” and 5 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
NHead and Facial Bones
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
6Temporal Bone, Left

Includes: Mastoid process; Petrous part of temporal bone; Tympanic part of temporal bone; Zygomatic process of temporal bone

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
ZNo Qualifier

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.

MDC 24 · Multiple Significant Trauma · Craniotomy for Multiple Significant Trauma

ICD-9-CM equivalent

Converter →
  • 01.25Other craniectomyapproximate
  • 01.6Excision of lesion of skullapproximate

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 0NB64ZZ

Is 0NB64ZZ a valid ICD-10-PCS code for 2027?

Yes. 0NB64ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0NB64ZZ an O.R. procedure?

Yes. 0NB64ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 0NB64ZZ group to?

Depending on the principal diagnosis, 0NB64ZZ can group to MS-DRG 023, MS-DRG 024, MS-DRG 025, MS-DRG 026, MS-DRG 027 and MS-DRG 143.

What is the ICD-9 procedure code for 0NB64ZZ?

The CMS GEMs map 0NB64ZZ to ICD-9-CM 01.25 (Other craniectomy) and 01.6 (Excision of lesion of skull).