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ICD-10-PCS 2027 procedure code

0NR437ZReplacement of Left Parietal Bone with Autologous Tissue Substitute, Percutaneous Approach

✓ Valid for 2027O.R. procedure

Short description: Replacement of L Parietal Bone with Autol Sub, Perc 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 0NR437Z

0NR437Z is the ICD-10-PCS code for a replacement procedure on the left parietal bone using a percutaneous approach with autologous 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 bone graft to skull, the ICD-9-CM procedure title it maps to (02.04).

For a different body part, codes include 0NR037Z (skull), 0NR137Z (frontal bone), 0NR337Z (right parietal bone), 0NR537Z (right temporal bone), 0NR637Z (left temporal bone), 0NR737Z (occipital bone) and 16 more.

The same procedure with a different approach is coded 0NR407Z (open) and 0NR447Z (percutaneous endoscopic).

With a different device, use 0NR43JZ (synthetic substitute) and 0NR43KZ (nonautologous tissue substitute).

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 1 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
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
4Parietal Bone, Left
5. Approach
3Percutaneous

Entry, by puncture or minor incision, of instrumentation through the skin or mucous membrane and any other body layers necessary to reach the site of the procedure

6. Device
7Autologous Tissue Substitute

Includes: Autograft; Cultured epidermal cell autograft; Epicel(R) cultured epidermal autograft

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 →
  • 02.04Bone graft to 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 0NR437Z

Is 0NR437Z a valid ICD-10-PCS code for 2027?

Yes. 0NR437Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0NR437Z an O.R. procedure?

Yes. 0NR437Z is an O.R. procedure in MS-DRG v44.0.

What DRG does 0NR437Z group to?

Depending on the principal diagnosis, 0NR437Z 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 0NR437Z?

The CMS GEMs map 0NR437Z to ICD-9-CM 02.04 (Bone graft to skull).