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ICD-10-PCS 2027 procedure code

0CB20ZXExcision of Hard Palate, Open Approach, Diagnostic

✓ 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 0CB20ZX

0CB20ZX is the ICD-10-PCS code for a excision procedure on the hard palate using an open approach (qualifier: diagnostic). In ICD-10-PCS, excision means cutting out or off, without replacement, a portion of a body part.

In plain terms, this corresponds to biopsy of bony palate, the ICD-9-CM procedure title it maps to (27.21).

For a different body part, codes include 0CB00ZX (upper lip), 0CB10ZX (lower lip), 0CB30ZX (soft palate), 0CB40ZX (buccal mucosa), 0CB50ZX (upper gingiva), 0CB60ZX (lower gingiva) and 18 more.

The same procedure with a different approach is coded 0CB23ZX (percutaneous) and 0CB2XZX (external).

It is an operating-room procedure in the MS-DRG logic for DRG 137 (Mouth Procedures with CC/MCC) and DRG 138 (Mouth Procedures without CC/MCC), under the surgical category “Mouth Procedures”.

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
CMouth and Throat
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
2Hard Palate
5. Approach
0Open

Cutting through the skin or mucous membrane and any other body layers necessary to expose the site of the procedure

6. Device
ZNo Device
7. Qualifier
XDiagnostic

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 03 · Diseases and Disorders of the Ear, Nose, Mouth and Throat · Mouth Procedures

ICD-9-CM equivalent

Converter →
  • 27.21Biopsy of bony palateapproximate

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 0CB20ZX

Is 0CB20ZX a valid ICD-10-PCS code for 2027?

Yes. 0CB20ZX is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0CB20ZX an O.R. procedure?

Yes. 0CB20ZX is an O.R. procedure in MS-DRG v44.0.

What DRG does 0CB20ZX group to?

Depending on the principal diagnosis, 0CB20ZX can group to MS-DRG 137 and MS-DRG 138.

What is the ICD-9 procedure code for 0CB20ZX?

The CMS GEMs map 0CB20ZX to ICD-9-CM 27.21 (Biopsy of bony palate).