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Inpatient Procedure Code

0K940ZZ ICD-10-PCS Code: Drainage of Tongue, Palate, Pharynx Muscle, Open Approach

Axis Breakdown

Every ICD-10-PCS code is exactly seven characters, one per axis. Each character's meaning is defined by its position in the code.

PositionValueMeaning
1
Section0

Medical and Surgical

2
Body SystemK

Muscles

3
Root Operation9

Drainage

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

4
Body Part4

Tongue, Palate, Pharynx Muscle

5
Approach0

Open

6
DeviceZ

No Device

7
QualifierZ

No Qualifier

MS-DRG Grouper Relationships (FY2026)

Potential MS-DRG participation — not a DRG assignment.

The MS-DRG grouper treats this as an operating room procedure. It appears in the surgical logic of 9 MS-DRGs:

From the CMS MS-DRG Definitions Manual, Appendix E. Actual DRG assignment depends on the complete claim.

Related Codes

Same operation — other Body Part

Same table and root operation, differing only in the body part character.

0K900ZZ — Drainage of Head Muscle, Open Approach, 0K910ZZ — Drainage of Facial Muscle, Open Approach, 0K920ZZ — Drainage of Right Neck Muscle, Open Approach, 0K930ZZ — Drainage of Left Neck Muscle, Open Approach, 0K950ZZ — Drainage of Right Shoulder Muscle, Open Approach, 0K960ZZ — Drainage of Left Shoulder Muscle, Open Approach, 0K970ZZ — Drainage of Right Upper Arm Muscle, Open Approach, 0K980ZZ — Drainage of Left Upper Arm Muscle, Open Approach, +19 more

Same operation — other Approach

Same table and root operation, differing only in the approach character.

0K943ZZ — Drainage of Tongue, Palate, Pharynx Muscle, Percutaneous Approach, 0K944ZZ — Drainage of Tongue, Palate, Pharynx Muscle, Percutaneous Endoscopic Approach

Same operation — other Device

Same table and root operation, differing only in the device character.

0K9400Z — Drainage of Tongue, Palate, Pharynx Muscle with Drainage Device, Open Approach

Same operation — other Qualifier

Same table and root operation, differing only in the qualifier character.

0K940ZX — Drainage of Tongue, Palate, Pharynx Muscle, Open Approach, Diagnostic

Same procedure category (CCSR), other tables

AHRQ's Clinical Classifications Software Refined groups these ICD-10-PCS procedures with this one under ENT drainage (excluding myringotomy) (Ear, Nose, and Throat Procedures); listed here are the members in other PCS tables. Source: Clinical Classifications Software Refined (CCSR), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, November 2025.

0CWS00Z — Revision of Drainage Device in Larynx, Open Approach, 0CWS30Z — Revision of Drainage Device in Larynx, Percutaneous Approach, 0CWS70Z — Revision of Drainage Device in Larynx, Via Natural or Artificial Opening, 0CWS80Z — Revision of Drainage Device in Larynx, Via Natural or Artificial Opening Endoscopic, 0CWSX0Z — Revision of Drainage Device in Larynx, External Approach, 0CWY00Z — Revision of Drainage Device in Mouth and Throat, Open Approach, 0CWY30Z — Revision of Drainage Device in Mouth and Throat, Percutaneous Approach, 0CWY70Z — Revision of Drainage Device in Mouth and Throat, Via Natural or Artificial Opening, 0CWY80Z — Revision of Drainage Device in Mouth and Throat, Via Natural or Artificial Opening Endoscopic, 0CWYX0Z — Revision of Drainage Device in Mouth and Throat, External Approach, 0W20X0Z — Change Drainage Device in Head, External Approach, 0W22X0Z — Change Drainage Device in Face, External Approach, 0W24X0Z — Change Drainage Device in Upper Jaw, External Approach, 0W25X0Z — Change Drainage Device in Lower Jaw, External Approach, 0W26X0Z — Change Drainage Device in Neck, External Approach, 0W9000Z — Drainage of Head with Drainage Device, Open Approach, 0W900ZZ — Drainage of Head, Open Approach, 0W9030Z — Drainage of Head with Drainage Device, Percutaneous Approach, 0W903ZZ — Drainage of Head, Percutaneous Approach, 0W9040Z — Drainage of Head with Drainage Device, Percutaneous Endoscopic Approach, +529 more

Contextual Map

Every relationship of 0K940ZZ in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run 0K940ZZ with these 5 related codes in Claim Check

PCS table

MS-DRG participation (9)

Clinical classification (CCSR)

MDC crossing · diagnoses (37176)

  • MDC 08 — Diseases and Disorders of the Musculoskeletal System and Connective Tissue[MDC crossing]: “Diseases and Disorders of the Musculoskeletal System and Connective Tissue — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs.”— CMS MS-DRG Definitions Manual · FY2026
  • MDC 09 — Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast[MDC crossing]: “Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs.”— CMS MS-DRG Definitions Manual · FY2026
  • A02.23 — Salmonella arthritis[Same-MDC diagnosis]: “Salmonella arthritis — grouped in MDC 08, the diagnosis side of this code's crossing.”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
  • A02.24 — Salmonella osteomyelitis[Same-MDC diagnosis]: “Salmonella osteomyelitis — grouped in MDC 08, the diagnosis side of this code's crossing.”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
  • A18.01 — Tuberculosis of spine[Same-MDC diagnosis]: “Tuberculosis of spine — grouped in MDC 08, the diagnosis side of this code's crossing.”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
  • A18.02 — Tuberculous arthritis of other joints[Same-MDC diagnosis]: “Tuberculous arthritis of other joints — grouped in MDC 08, the diagnosis side of this code's crossing.”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
  • A18.03 — Tuberculosis of other bones[Same-MDC diagnosis]: “Tuberculosis of other bones — grouped in MDC 08, the diagnosis side of this code's crossing.”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
  • and 37171 more

Nearest codes

Change history

No changes recorded for this code. This ledger tracks additions, deletions and description changes from FY2026 (April) onward. Note changes are not tracked.

Read from: CMS ICD-10-PCS code tables, index and definitions — FY2026 (April); CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v43; AHRQ HCUP Clinical Classifications Software Refined for ICD-10-PCS Procedures (hcup-us.ahrq.gov/toolssoftware/ccsr/PRCCSR_v2026-1.zip) — v2026.1. All data sources · How to read the labels