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ICD-10-PCS 2027 procedure code

00RN4KZReplacement of Acoustic Nerve with Nonautologous Tissue Substitute, Percutaneous Endoscopic Approach

✓ Valid for 2027O.R. procedure

Short description: Replace of Acoust Nrv with Nonaut Sub, Perc Endo Approach

Code last changed in FY2018 (effective October 1, 2017). Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data

About 00RN4KZ

00RN4KZ is the ICD-10-PCS code for a replacement procedure on the acoustic nerve using a percutaneous endoscopic approach with nonautologous tissue substitute. In ICD-10-PCS, replacement means putting in or on biological or synthetic material that physically takes the place and/or function of all or a portion of a body part.

In plain terms, this corresponds to cranial or peripheral nerve graft, the ICD-9-CM procedure title it maps to (04.5).

For a different body part, codes include 00R14KZ (cerebral meninges), 00R24KZ (dura mater), 00R64KZ (cerebral ventricle), 00RF4KZ (olfactory nerve), 00RG4KZ (optic nerve), 00RH4KZ (oculomotor nerve) and 9 more.

The same procedure with a different approach is coded 00RN0KZ (open).

With a different device, use 00RN47Z (autologous tissue substitute) and 00RN4JZ (synthetic substitute).

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 O.R. Procedures for Injuries” and 1 more.

It was added in FY2018, effective October 1, 2017.

What each character means

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

Putting in or on biological or synthetic material that physically takes the place and/or function of all or a portion of a body part

The body part may have been taken out or replaced, or may be taken out, physically eradicated, or rendered nonfunctional during the Replacement procedure. A Removal procedure is coded for taking out the device used in a previous replacement procedure

Includes: Total hip replacement, bone graft, free skin graft

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
KNonautologous Tissue Substitute

Includes: Acellular Hydrated Dermis; Bone bank bone graft; Cook Biodesign(R) Fistula Plug(s); Cook Biodesign(R) Hernia Graft(s); Cook Biodesign(R) Layered Graft(s); Cook Zenapro(tm) Layered Graft(s); Fish skin; Kerecis(R) (GraftGuide) (MariGen) (SurgiBind) (SurgiClose); MIRODERM(tm) Biologic Wound Matrix; Piscine skin; Tissue bank graft

7. Qualifier
ZNo Qualifier

Other versions of this procedure

Different approach

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 →
  • 04.5Cranial or peripheral nerve graftapproximate

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
  • FY2018 (effective 10/1/2017): Added
  • No changes since FY2018.

Common questions about 00RN4KZ

Is 00RN4KZ a valid ICD-10-PCS code for 2027?

Yes. 00RN4KZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 00RN4KZ an O.R. procedure?

Yes. 00RN4KZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 00RN4KZ group to?

Depending on the principal diagnosis, 00RN4KZ 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 00RN4KZ?

The CMS GEMs map 00RN4KZ to ICD-9-CM 04.5 (Cranial or peripheral nerve graft).