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ICD-10-PCS 2027 procedure code

008M4ZZDivision of Facial Nerve, Percutaneous Endoscopic Approach

✓ 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 008M4ZZ

008M4ZZ is the ICD-10-PCS code for a division procedure on the facial nerve using a percutaneous endoscopic approach. In ICD-10-PCS, division means cutting into a body part, without draining fluids and/or gases from the body part, in order to separate or transect a body part.

In plain terms, this corresponds to division or crushing of other cranial and peripheral nerves, the ICD-9-CM procedure title it maps to (04.03).

For a different body part, codes include 00804ZZ (brain), 00874ZZ (cerebral hemisphere), 00884ZZ (basal ganglia), 008F4ZZ (olfactory nerve), 008G4ZZ (optic nerve), 008H4ZZ (oculomotor nerve) and 11 more.

The same procedure with a different approach is coded 008M0ZZ (open) and 008M3ZZ (percutaneous).

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
8Division

Cutting into a body part, without draining fluids and/or gases from the body part, in order to separate or transect a body part

All or a portion of the body part is separated into two or more portions

Includes: Spinal cordotomy, osteotomy

4. Body Part
MFacial Nerve

Includes: Chorda tympani; Geniculate ganglion; Greater superficial petrosal nerve; Nerve to the stapedius; Parotid plexus; Posterior auricular nerve; Seventh cranial nerve; Submandibular ganglion

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

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 →
  • 04.03Division or crushing of other cranial and peripheral nervesapproximate

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 008M4ZZ

Is 008M4ZZ a valid ICD-10-PCS code for 2027?

Yes. 008M4ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 008M4ZZ an O.R. procedure?

Yes. 008M4ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 008M4ZZ group to?

Depending on the principal diagnosis, 008M4ZZ 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 008M4ZZ?

The CMS GEMs map 008M4ZZ to ICD-9-CM 04.03 (Division or crushing of other cranial and peripheral nerves).