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ICD-10-PCS 2027 procedure code

0CTM0ZZResection of Pharynx, Open 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 0CTM0ZZ

0CTM0ZZ is the ICD-10-PCS code for a resection procedure on the pharynx using an open approach. In ICD-10-PCS, resection means cutting out or off, without replacement, all of a body part.

In plain terms, this corresponds to Pharyngectomy (partial), the ICD-9-CM procedure title it maps to (29.33).

For a different body part, codes include 0CT00ZZ (upper lip), 0CT10ZZ (lower lip), 0CT20ZZ (hard palate), 0CT30ZZ (soft palate), 0CT70ZZ (tongue), 0CT80ZZ (right parotid gland) and 15 more.

The same procedure with a different approach is coded 0CTM4ZZ (percutaneous endoscopic), 0CTM7ZZ (via natural or artificial opening) and 0CTM8ZZ (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), DRG 145 (Other Ear, Nose, Mouth and Throat O.R. Procedures without CC/MCC), DRG 326 (Stomach, Esophageal and Duodenal Procedures with MCC), DRG 327 (Stomach, Esophageal and Duodenal Procedures with CC) and DRG 328 (Stomach, Esophageal and Duodenal Procedures without CC/MCC), under the surgical categories “Other Ear, Nose, Mouth and Throat O.R. Procedures” and “Stomach, Esophageal and Duodenal 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
TResection

Cutting out or off, without replacement, all of a body part

Includes: Total nephrectomy, total lobectomy of lung

4. Body Part
MPharynx

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

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

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 →
  • 29.33Pharyngectomy (partial)approximate

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 0CTM0ZZ

Is 0CTM0ZZ a valid ICD-10-PCS code for 2027?

Yes. 0CTM0ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0CTM0ZZ an O.R. procedure?

Yes. 0CTM0ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 0CTM0ZZ group to?

Depending on the principal diagnosis, 0CTM0ZZ can group to MS-DRG 143, MS-DRG 144, MS-DRG 145, MS-DRG 326, MS-DRG 327 and MS-DRG 328.

What is the ICD-9 procedure code for 0CTM0ZZ?

The CMS GEMs map 0CTM0ZZ to ICD-9-CM 29.33 (Pharyngectomy (partial)).