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Inpatient Procedure Code

099B8ZX ICD-10-PCS Code: Drainage of Right Mastoid Sinus, Via Natural or Artificial Opening Endoscopic, Diagnostic

Drainage of Right 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 Operation9

Drainage

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

4
Body PartB

Mastoid Sinus, Right

5
Approach8

Via Natural or Artificial Opening Endoscopic

6
DeviceZ

No Device

7
QualifierX

Diagnostic

Related Codes

Same operation — other Body Part

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

09978ZX — Drainage of Right Tympanic Membrane, Via Natural or Artificial Opening Endoscopic, Diagnostic, 09988ZX — Drainage of Left Tympanic Membrane, Via Natural or Artificial Opening Endoscopic, Diagnostic, 09998ZX — Drainage of Right Auditory Ossicle, Via Natural or Artificial Opening Endoscopic, Diagnostic, 099A8ZX — Drainage of Left Auditory Ossicle, Via Natural or Artificial Opening Endoscopic, Diagnostic, 099C8ZX — Drainage of Left Mastoid Sinus, Via Natural or Artificial Opening Endoscopic, Diagnostic, 099D8ZX — Drainage of Right Inner Ear, Via Natural or Artificial Opening Endoscopic, Diagnostic, 099E8ZX — Drainage of Left Inner Ear, Via Natural or Artificial Opening Endoscopic, Diagnostic, 099F8ZX — Drainage of Right 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.

099B0ZX — Drainage of Right Mastoid Sinus, Open Approach, Diagnostic, 099B3ZX — Drainage of Right Mastoid Sinus, Percutaneous Approach, Diagnostic, 099B4ZX — Drainage of Right Mastoid Sinus, Percutaneous Endoscopic Approach, Diagnostic, 099B7ZX — Drainage of Right Mastoid Sinus, Via Natural or Artificial Opening, Diagnostic

Same operation — other Qualifier

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

099B8ZZ — Drainage of Right 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.

09B38ZX — Excision of Right External Auditory Canal, Via Natural or Artificial Opening Endoscopic, Diagnostic, 09B48ZX — Excision of Left External Auditory Canal, Via Natural or Artificial Opening Endoscopic, Diagnostic, 09B58ZX — Excision of Right Middle Ear, Via Natural or Artificial Opening Endoscopic, Diagnostic, 09B68ZX — Excision of Left Middle Ear, Via Natural or Artificial Opening Endoscopic, Diagnostic, 09B78ZX — Excision of Right Tympanic Membrane, Via Natural or Artificial Opening Endoscopic, Diagnostic, 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, 09BC8ZX — Excision of Left 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, 09BK8ZX — Excision of Nasal Mucosa and Soft Tissue, Via Natural or Artificial Opening Endoscopic, Diagnostic, 09BL8ZX — Excision of Nasal Turbinate, Via Natural or Artificial Opening Endoscopic, Diagnostic, 09BM8ZX — Excision of Nasal Septum, Via Natural or Artificial Opening Endoscopic, Diagnostic, 09BN8ZX — Excision of Nasopharynx, Via Natural or Artificial Opening Endoscopic, Diagnostic, 09BP8ZX — Excision of Accessory Sinus, Via Natural or Artificial Opening Endoscopic, Diagnostic, 09BQ8ZX — Excision of Right Maxillary Sinus, Via Natural or Artificial Opening Endoscopic, Diagnostic, +20 more

Contextual Map

Every relationship of 099B8ZX 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

Clinical classification (CCSR)

Nearest codes

Change history

Change history

  • FY2018 — October 1, 2017
    Added to the code set
    Drainage of Right 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