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ICD-10-PCS 2027 procedure code

0NU637ZSupplement Left Temporal Bone with Autologous Tissue Substitute, Percutaneous Approach

✓ Valid for 2027O.R. procedure

Short description: Supplement Left Temporal 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 0NU637Z

0NU637Z is the ICD-10-PCS code for a supplement procedure on the left temporal bone using a percutaneous approach with autologous tissue substitute. In ICD-10-PCS, supplement means putting in or on biological or synthetic material that physically reinforces and/or augments the function of 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 0NU037Z (skull), 0NU137Z (frontal bone), 0NU337Z (right parietal bone), 0NU437Z (left parietal bone), 0NU537Z (right temporal bone), 0NU737Z (occipital bone) and 16 more.

The same procedure with a different approach is coded 0NU607Z (open) and 0NU647Z (percutaneous endoscopic).

With a different device, use 0NU63JZ (synthetic substitute) and 0NU63KZ (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
USupplement

Putting in or on biological or synthetic material that physically reinforces and/or augments the function of a portion of a body part

The biological material is non-living, or is living and from the same individual. The body part may have been previously replaced, and the Supplement procedure is performed to physically reinforce and/or augment the function of the replaced body part

Includes: Herniorrhaphy using mesh, mitral valve ring annuloplasty, put a new acetabular liner in a previous hip replacement

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
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 0NU637Z

Is 0NU637Z a valid ICD-10-PCS code for 2027?

Yes. 0NU637Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0NU637Z an O.R. procedure?

Yes. 0NU637Z is an O.R. procedure in MS-DRG v44.0.

What DRG does 0NU637Z group to?

Depending on the principal diagnosis, 0NU637Z 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 0NU637Z?

The CMS GEMs map 0NU637Z to ICD-9-CM 02.04 (Bone graft to skull).