0N9M0ZZ ICD-10-PCS Code: Drainage of Right Zygomatic Bone, Open Approach

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 3 MS-DRGs:

• MDC 03 — Other Ear, Nose, Mouth and Throat O.R. Procedures: DRG 143, DRG 144, DRG 145

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.

0N9H0ZZ — Drainage of Right Lacrimal Bone, Open Approach, 0N9J0ZZ — Drainage of Left Lacrimal Bone, Open Approach, 0N9K0ZZ — Drainage of Right Palatine Bone, Open Approach, 0N9L0ZZ — Drainage of Left Palatine Bone, Open Approach, 0N9N0ZZ — Drainage of Left Zygomatic Bone, Open Approach, 0N9P0ZZ — Drainage of Right Orbit, Open Approach, 0N9Q0ZZ — Drainage of Left Orbit, Open Approach, 0N9R0ZZ — Drainage of Maxilla, Open Approach, +14 more

Same operation — other Approach

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

0N9M3ZZ — Drainage of Right Zygomatic Bone, Percutaneous Approach, 0N9M4ZZ — Drainage of Right Zygomatic Bone, Percutaneous Endoscopic Approach

Same operation — other Device

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

0N9M00Z — Drainage of Right Zygomatic Bone with Drainage Device, Open Approach

Same operation — other Qualifier

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

0N9M0ZX — Drainage of Right Zygomatic Bone, 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 Incision and drainage of musculoskeletal tissue and joints (Musculoskeletal, Subcutaneous Tissue, and Fascia 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.

+1793 more

Contextual Map

Every relationship of 0N9M0ZZ 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 0N9M0ZZ with these 5 related codes in Claim Check

PCS table

• 0N9[PCS table]— CMS ICD-10-PCS tables
• Medical and Surgical — Section: Medical and Surgical[Section]: “Medical and Surgical”— CMS ICD-10-PCS tables
• Head and Facial Bones — Body System: Head and Facial Bones[Body System]: “Head and Facial Bones”— CMS ICD-10-PCS tables
• Drainage — Operation: Drainage[Operation]: “Drainage”— CMS ICD-10-PCS tables

MS-DRG participation

• DRG 143 — OTHER EAR, NOSE, MOUTH AND THROAT O.R. PROCEDURES WITH MCC[MS-DRG]: “OTHER EAR, NOSE, MOUTH AND THROAT O.R. PROCEDURES WITH MCC — Other Ear, Nose, Mouth and Throat O.R. Procedures (MDC 03)”— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• DRG 144 — OTHER EAR, NOSE, MOUTH AND THROAT O.R. PROCEDURES WITH CC[MS-DRG]: “OTHER EAR, NOSE, MOUTH AND THROAT O.R. PROCEDURES WITH CC — Other Ear, Nose, Mouth and Throat O.R. Procedures (MDC 03)”— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• DRG 145 — OTHER EAR, NOSE, MOUTH AND THROAT O.R. PROCEDURES WITHOUT CC/MCC[MS-DRG]: “OTHER EAR, NOSE, MOUTH AND THROAT O.R. PROCEDURES WITHOUT CC/MCC — Other Ear, Nose, Mouth and Throat O.R. Procedures (MDC 03)”— CMS MS-DRG Definitions Manual (Appendix E) · FY2026

Clinical classification (CCSR)

• MST004 — Incision and drainage of musculoskeletal tissue and joints[CCSR category]: “Incision and drainage of musculoskeletal tissue and joints — Musculoskeletal, Subcutaneous Tissue, and Fascia Procedures”— AHRQ CCSR for ICD-10-PCS Procedures (HCUP) · v2026.1

MDC crossing · diagnoses (1444)

• MDC 03 — Diseases and Disorders of the Ear, Nose, Mouth and Throat[MDC crossing]: “Diseases and Disorders of the Ear, Nose, Mouth and Throat — 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
• A18.6 — Tuberculosis of (inner) (middle) ear[Same-MDC diagnosis]: “Tuberculosis of (inner) (middle) ear — grouped in MDC 03, the diagnosis side of this code's crossing.”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• A36.0 — Pharyngeal diphtheria[Same-MDC diagnosis]: “Pharyngeal diphtheria — grouped in MDC 03, the diagnosis side of this code's crossing.”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• A36.1 — Nasopharyngeal diphtheria[Same-MDC diagnosis]: “Nasopharyngeal diphtheria — grouped in MDC 03, the diagnosis side of this code's crossing.”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• A36.2 — Laryngeal diphtheria[Same-MDC diagnosis]: “Laryngeal diphtheria — grouped in MDC 03, the diagnosis side of this code's crossing.”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• A54.5 — Gonococcal pharyngitis[Same-MDC diagnosis]: “Gonococcal pharyngitis — grouped in MDC 03, the diagnosis side of this code's crossing.”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• and 1439 more

Nearest codes

• 0N900ZZ — Drainage of Skull, Open Approach[One axis away]— CMS ICD-10-PCS tables
• 0N910ZZ — Drainage of Frontal Bone, Open Approach[One axis away]— CMS ICD-10-PCS tables
• 0N930ZZ — Drainage of Right Parietal Bone, Open Approach[One axis away]— CMS ICD-10-PCS tables
• 0N940ZZ — Drainage of Left Parietal Bone, Open Approach[One axis away]— CMS ICD-10-PCS tables
• 0N950ZZ — Drainage of Right Temporal Bone, Open Approach[One axis away]— CMS ICD-10-PCS tables
• 0N960ZZ — Drainage of Left Temporal Bone, Open Approach[One axis away]— CMS ICD-10-PCS tables
• 0N970ZZ — Drainage of Occipital Bone, Open Approach[One axis away]— CMS ICD-10-PCS tables
• 0N9B0ZZ — Drainage of Nasal Bone, Open Approach[One axis away]— CMS ICD-10-PCS tables