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ICD-10-PCS 2027 procedure code

0CNM4ZZRelease Pharynx, Percutaneous Endoscopic Approach

✓ 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 0CNM4ZZ

0CNM4ZZ is the ICD-10-PCS code for a release procedure on the pharynx using a percutaneous endoscopic 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 lysis of pharyngeal adhesions, the ICD-9-CM procedure title it maps to (29.54).

For a different body part, codes include 0CNR4ZZ (epiglottis), 0CNS4ZZ (larynx), 0CNT4ZZ (right vocal cord) and 0CNV4ZZ (left vocal cord).

The same procedure with a different approach is coded 0CNM0ZZ (open), 0CNM3ZZ (percutaneous), 0CNM7ZZ (via natural or artificial opening) and 0CNM8ZZ (via natural or artificial opening endoscopic).

It is an operating-room procedure in the MS-DRG logic for 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 category “Other Ear, Nose, Mouth and Throat O.R. 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
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
MPharynx

Includes: Base of Tongue; Hypopharynx; Laryngopharynx; Lingual tonsil; Oropharynx; Piriform recess (sinus); Tongue, base of

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
ZNo Device
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 →
  • 29.54Lysis of pharyngeal adhesionsapproximate

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 0CNM4ZZ

Is 0CNM4ZZ a valid ICD-10-PCS code for 2027?

Yes. 0CNM4ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0CNM4ZZ an O.R. procedure?

Yes. 0CNM4ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 0CNM4ZZ group to?

Depending on the principal diagnosis, 0CNM4ZZ can group to MS-DRG 143, MS-DRG 144 and MS-DRG 145.

What is the ICD-9 procedure code for 0CNM4ZZ?

The CMS GEMs map 0CNM4ZZ to ICD-9-CM 29.54 (Lysis of pharyngeal adhesions).