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Inpatient Procedure Code

09BC8ZX ICD-10-PCS Code: Excision of Left Mastoid Sinus, Via Natural or Artificial Opening Endoscopic, Diagnostic

Excision of Left Mastoid Sinus, Endo, Diagn

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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 System9

Ear, Nose, Sinus

3
Root OperationB

Excision

Cutting out or off, without replacement, a portion of a body part

4
Body PartC

Mastoid Sinus, Left

5
Approach8

Via Natural or Artificial Opening Endoscopic

6
DeviceZ

No Device

7
QualifierX

Diagnostic

MS-DRG Grouper Relationships (FY2027)

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:

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.

09B88ZX — Excision of Left Tympanic Membrane, Via Natural or Artificial Opening Endoscopic, Diagnostic, 09B98ZX — Excision of Right Auditory Ossicle, Via Natural or Artificial Opening Endoscopic, Diagnostic, 09BA8ZX — Excision of Left Auditory Ossicle, Via Natural or Artificial Opening Endoscopic, Diagnostic, 09BB8ZX — Excision of Right Mastoid Sinus, Via Natural or Artificial Opening Endoscopic, Diagnostic, 09BD8ZX — Excision of Right Inner Ear, Via Natural or Artificial Opening Endoscopic, Diagnostic, 09BE8ZX — Excision of Left Inner Ear, Via Natural or Artificial Opening Endoscopic, Diagnostic, 09BF8ZX — Excision of Right Eustachian Tube, Via Natural or Artificial Opening Endoscopic, Diagnostic, 09BG8ZX — Excision of Left Eustachian Tube, Via Natural or Artificial Opening Endoscopic, Diagnostic, +18 more

Same operation — other Approach

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

09BC0ZX — Excision of Left Mastoid Sinus, Open Approach, Diagnostic, 09BC3ZX — Excision of Left Mastoid Sinus, Percutaneous Approach, Diagnostic, 09BC4ZX — Excision of Left Mastoid Sinus, Percutaneous Endoscopic Approach, Diagnostic

Same operation — other Qualifier

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

09BC8ZZ — Excision of Left Mastoid Sinus, Via Natural or Artificial Opening Endoscopic

Same procedure category (CCSR), other tables

AHRQ's Clinical Classifications Software Refined groups these ICD-10-PCS procedures with this one under ENT diagnostic endoscopy (excluding laryngoscopy) (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.

099N8ZX — Drainage of Nasopharynx, Via Natural or Artificial Opening Endoscopic, Diagnostic, 099P8ZX — Drainage of Accessory Sinus, Via Natural or Artificial Opening Endoscopic, Diagnostic, 099Q8ZX — Drainage of Right Maxillary Sinus, Via Natural or Artificial Opening Endoscopic, Diagnostic, 099R8ZX — Drainage of Left Maxillary Sinus, Via Natural or Artificial Opening Endoscopic, Diagnostic, 099S8ZX — Drainage of Right Frontal Sinus, Via Natural or Artificial Opening Endoscopic, Diagnostic, 099T8ZX — Drainage of Left Frontal Sinus, Via Natural or Artificial Opening Endoscopic, Diagnostic, 099U8ZX — Drainage of Right Ethmoid Sinus, Via Natural or Artificial Opening Endoscopic, Diagnostic, 099V8ZX — Drainage of Left Ethmoid Sinus, Via Natural or Artificial Opening Endoscopic, Diagnostic, 099W8ZX — Drainage of Right Sphenoid Sinus, Via Natural or Artificial Opening Endoscopic, Diagnostic, 099X8ZX — Drainage of Left Sphenoid Sinus, Via Natural or Artificial Opening Endoscopic, Diagnostic, 09J78ZZ — Inspection of Right Tympanic Membrane, Via Natural or Artificial Opening Endoscopic, 09J88ZZ — Inspection of Left Tympanic Membrane, Via Natural or Artificial Opening Endoscopic, 09JD8ZZ — Inspection of Right Inner Ear, Via Natural or Artificial Opening Endoscopic, 09JE8ZZ — Inspection of Left Inner Ear, Via Natural or Artificial Opening Endoscopic, 09JH8ZZ — Inspection of Right Ear, Via Natural or Artificial Opening Endoscopic, 09JJ8ZZ — Inspection of Left Ear, Via Natural or Artificial Opening Endoscopic, 09JK8ZZ — Inspection of Nasal Mucosa and Soft Tissue, Via Natural or Artificial Opening Endoscopic, 09JY8ZZ — Inspection of Sinus, Via Natural or Artificial Opening Endoscopic, 0C9M8ZX — Drainage of Pharynx, Via Natural or Artificial Opening Endoscopic, Diagnostic, 0CBM8ZX — Excision of Pharynx, Via Natural or Artificial Opening Endoscopic, Diagnostic, +20 more

Contextual Map

Every relationship of 09BC8ZX 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 09BC8ZX with these 5 related codes in Claim Check

PCS table

MS-DRG participation

Clinical classification (CCSR)

MDC crossing · diagnoses (1449)

  • 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 · FY2027
  • 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) · FY2027
  • 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) · FY2027
  • 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) · FY2027
  • 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) · FY2027
  • 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) · FY2027
  • and 1444 more

Nearest codes

Change history

Change history

  • FY2018 — October 1, 2017
    Added to the code set
    Excision of Left Mastoid Sinus, Via Natural or Artificial Opening Endoscopic, Diagnostic
    FY2018 changes

Read from: CMS ICD-10-PCS code tables, index and definitions — FY2027; CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v44; 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 · How MedCoder verifies its implementation

Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 28, 2026 · All releases and sources