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ICD-10-PCS 2027 procedure code

0K9100ZDrainage of Facial Muscle with Drainage Device, Open Approach

✓ Valid for 2027O.R. procedure

Short description: Drainage of Facial Muscle with Drain Dev, Open 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 0K9100Z

0K9100Z is the ICD-10-PCS code for a drainage procedure on the facial muscle using an open approach with drainage device. In ICD-10-PCS, drainage means taking or letting out fluids and/or gases from a body part.

In plain terms, this corresponds to myotomy, the ICD-9-CM procedure title it maps to (83.02).

For a different body part, codes include 0K9000Z (head muscle), 0K9200Z (right neck muscle), 0K9300Z (left neck muscle), 0K9400Z (tongue, palate, pharynx muscle), 0K9500Z (right shoulder muscle), 0K9600Z (left shoulder muscle) and 21 more.

The same procedure with a different approach is coded 0K9130Z (percutaneous) and 0K9140Z (percutaneous endoscopic).

With a different device, use 0K910ZZ (no device).

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 500 (Soft Tissue Procedures with MCC), DRG 501 (Soft Tissue Procedures with CC) and DRG 502 (Soft Tissue Procedures without CC/MCC), under the surgical categories “Other Ear, Nose, Mouth and Throat O.R. Procedures”, “Soft Tissue Procedures”, “Other Skin, Subcutaneous Tissue and Breast 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
KMuscles
3. Operation
9Drainage

Taking or letting out fluids and/or gases from a body part

The qualifier DIAGNOSTIC is used to identify drainage procedures that are biopsies

Includes: Thoracentesis, incision and drainage

4. Body Part
1Facial Muscle

Includes: Buccinator muscle; Corrugator supercilii muscle; Depressor anguli oris muscle; Depressor labii inferioris muscle; Depressor septi nasi muscle; Depressor supercilii muscle; Levator anguli oris muscle; Levator labii superioris alaeque nasi muscle; Levator labii superioris muscle; Mentalis muscle; Nasalis muscle; Occipitofrontalis muscle; Orbicularis oris muscle; Procerus muscle; Risorius muscle; Zygomaticus muscle

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
0Drainage Device

Includes: Cystostomy tube; Foley catheter; Percutaneous nephrostomy catheter; Thoracostomy tube

7. Qualifier
ZNo Qualifier

Other versions of this procedure

Different device

MS-DRG v44.0 grouping

All DRGs →

Surgical MS-DRGs this procedure can group to, depending on the principal diagnosis's MDC.

MDC 08 · Diseases and Disorders of the Musculoskeletal System and Connective Tissue · Soft Tissue Procedures

ICD-9-CM equivalent

Converter →

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 0K9100Z

Is 0K9100Z a valid ICD-10-PCS code for 2027?

Yes. 0K9100Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0K9100Z an O.R. procedure?

Yes. 0K9100Z is an O.R. procedure in MS-DRG v44.0.

What DRG does 0K9100Z group to?

Depending on the principal diagnosis, 0K9100Z can group to MS-DRG 143, MS-DRG 144, MS-DRG 145, MS-DRG 500, MS-DRG 501 and MS-DRG 502.

What is the ICD-9 procedure code for 0K9100Z?

The CMS GEMs map 0K9100Z to ICD-9-CM 83.02 (Myotomy).