09QC4ZZ
Repair Left Mastoid Sinus, Percutaneous Endoscopic 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.
| Position | Value | Meaning |
|---|---|---|
| 1 | Section0 | Medical and Surgical |
| 2 | Body System9 | Ear, Nose, Sinus |
| 3 | Root OperationQ | Repair Restoring, to the extent possible, a body part to its normal anatomic structure and function |
| 4 | Body PartC | Mastoid Sinus, Left |
| 5 | Approach4 | Percutaneous Endoscopic |
| 6 | DeviceZ | No Device |
| 7 | QualifierZ | No Qualifier |
Potential MS-DRG Relationships (FY2026)
The MS-DRG grouper treats this as an operating room procedure. It appears in the surgical logic of 2 MS-DRGs:
From the CMS MS-DRG Definitions Manual, Appendix E. Actual DRG assignment depends on the complete claim.
Contextual Map
Every relationship of 09QC4ZZ 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.
PCS table
- 09Q[PCS table]
- [object Object] — Section: [object Object] [Section]: “[object Object]”
- [object Object] — Body System: [object Object] [Body System]: “[object Object]”
- [object Object] — Operation: [object Object] [Operation]: “[object Object]”
MS-DRG participation
- DRG 135 — SINUS AND MASTOID PROCEDURES WITH CC/MCC [MS-DRG]: “SINUS AND MASTOID PROCEDURES WITH CC/MCC — Sinus and Mastoid Procedures (MDC 03)”
- DRG 136 — SINUS AND MASTOID PROCEDURES WITHOUT CC/MCC [MS-DRG]: “SINUS AND MASTOID PROCEDURES WITHOUT CC/MCC — Sinus and Mastoid Procedures (MDC 03)”
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.”
- 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.” · check together
- A36.0 — Pharyngeal diphtheria [Same-MDC diagnosis]: “Pharyngeal diphtheria — grouped in MDC 03, the diagnosis side of this code's crossing.” · check together
- A36.1 — Nasopharyngeal diphtheria [Same-MDC diagnosis]: “Nasopharyngeal diphtheria — grouped in MDC 03, the diagnosis side of this code's crossing.” · check together
- A36.2 — Laryngeal diphtheria [Same-MDC diagnosis]: “Laryngeal diphtheria — grouped in MDC 03, the diagnosis side of this code's crossing.” · check together
- A54.5 — Gonococcal pharyngitis [Same-MDC diagnosis]: “Gonococcal pharyngitis — grouped in MDC 03, the diagnosis side of this code's crossing.” · check together
- and 1439 more
Nearest codes
- 09Q04ZZ — Repair Right External Ear, Percutaneous Endoscopic Approach [One axis away]
- 09Q14ZZ — Repair Left External Ear, Percutaneous Endoscopic Approach [One axis away]
- 09Q24ZZ — Repair Bilateral External Ear, Percutaneous Endoscopic Approach [One axis away]
- 09Q34ZZ — Repair Right External Auditory Canal, Percutaneous Endoscopic Approach [One axis away]
- 09Q44ZZ — Repair Left External Auditory Canal, Percutaneous Endoscopic Approach [One axis away]
- 09Q74ZZ — Repair Right Tympanic Membrane, Percutaneous Endoscopic Approach [One axis away]
- 09Q84ZZ — Repair Left Tympanic Membrane, Percutaneous Endoscopic Approach [One axis away]
- 09QB4ZZ — Repair Right Mastoid Sinus, Percutaneous Endoscopic Approach [One axis away]
Change history
No changes recorded for this code — unchanged since the FY2026 (April) baseline of the change ledger.