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ICD-10-PCS 2027 procedure code

0CN00ZZRelease Upper Lip, Open Approach

✓ Valid for 2027

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 0CN00ZZ

0CN00ZZ is the ICD-10-PCS code for a release procedure on the upper lip using an open approach. In ICD-10-PCS, release means freeing a body part from an abnormal physical constraint by cutting or by the use of force.

In plain terms, this corresponds to labial frenotomy, the ICD-9-CM procedure title it maps to (27.91).

For a different body part, codes include 0CN10ZZ (lower lip), 0CN20ZZ (hard palate), 0CN30ZZ (soft palate), 0CN40ZZ (buccal mucosa), 0CN50ZZ (upper gingiva), 0CN60ZZ (lower gingiva) and 18 more.

The same procedure with a different approach is coded 0CN03ZZ (percutaneous) and 0CN0XZZ (external).

It doesn't appear in the MS-DRG procedure index, so on its own it doesn't change the DRG assignment.

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
NRelease

Freeing a body part from an abnormal physical constraint by cutting or by the use of force

Some of the restraining tissue may be taken out but none of the body part is taken out

Includes: Adhesiolysis, carpal tunnel release

4. Body Part
0Upper Lip

Includes: Frenulum labii superioris; Labial gland; Vermilion border

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
ZNo Qualifier

Other versions of this procedure

ICD-9-CM equivalent

Converter →
  • 27.91Labial frenotomyapproximate

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 0CN00ZZ

Is 0CN00ZZ a valid ICD-10-PCS code for 2027?

Yes. 0CN00ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 0CN00ZZ?

The CMS GEMs map 0CN00ZZ to ICD-9-CM 27.91 (Labial frenotomy).