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ICD-10-PCS 2027 procedure code

0K9W4ZZDrainage of Left Foot Muscle, Percutaneous Endoscopic Approach

✓ Valid for 2027O.R. procedure

Short description: Drainage of Left Foot Muscle, Perc Endo 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 0K9W4ZZ

0K9W4ZZ is the ICD-10-PCS code for a drainage procedure on the left foot muscle using a percutaneous endoscopic approach. 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 0K904ZZ (head muscle), 0K914ZZ (facial muscle), 0K924ZZ (right neck muscle), 0K934ZZ (left neck muscle), 0K944ZZ (tongue, palate, pharynx muscle), 0K954ZZ (right shoulder muscle) and 21 more.

The same procedure with a different approach is coded 0K9W0ZZ (open) and 0K9W3ZZ (percutaneous).

With a different device, use 0K9W40Z (drainage device).

It is an operating-room procedure in the MS-DRG logic for DRG 500 (Soft Tissue Procedures with MCC), DRG 501 (Soft Tissue Procedures with CC), DRG 502 (Soft Tissue Procedures without CC/MCC), DRG 579 (Other Skin, Subcutaneous Tissue and Breast Procedures with MCC), DRG 580 (Other Skin, Subcutaneous Tissue and Breast Procedures with CC) and DRG 581 (Other Skin, Subcutaneous Tissue and Breast Procedures without CC/MCC), under the surgical categories “Soft Tissue Procedures”, “Other Skin, Subcutaneous Tissue and Breast Procedures” and “Other O.R. Procedures for Injuries”.

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
WFoot Muscle, Left

Includes: Abductor hallucis muscle; Adductor hallucis muscle; Extensor digitorum brevis muscle; Extensor hallucis brevis muscle; Flexor digitorum brevis muscle; Flexor hallucis brevis muscle; Quadratus plantae muscle

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

Different device

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 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 0K9W4ZZ

Is 0K9W4ZZ a valid ICD-10-PCS code for 2027?

Yes. 0K9W4ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0K9W4ZZ an O.R. procedure?

Yes. 0K9W4ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 0K9W4ZZ group to?

Depending on the principal diagnosis, 0K9W4ZZ can group to MS-DRG 500, MS-DRG 501, MS-DRG 502, MS-DRG 579, MS-DRG 580 and MS-DRG 581.

What is the ICD-9 procedure code for 0K9W4ZZ?

The CMS GEMs map 0K9W4ZZ to ICD-9-CM 83.02 (Myotomy).