00BN0ZZ ICD-10-PCS Code: Excision of Acoustic Nerve, 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 8 MS-DRGs:

• MDC 01 — Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis: DRG 023, DRG 024
• MDC 01 — Craniotomy and endovascular intracranial procedures: DRG 025, DRG 026, DRG 027
• 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.

00BJ0ZZ — Excision of Trochlear Nerve, Open Approach, 00BK0ZZ — Excision of Trigeminal Nerve, Open Approach, 00BL0ZZ — Excision of Abducens Nerve, Open Approach, 00BM0ZZ — Excision of Facial Nerve, Open Approach, 00BP0ZZ — Excision of Glossopharyngeal Nerve, Open Approach, 00BQ0ZZ — Excision of Vagus Nerve, Open Approach, 00BR0ZZ — Excision of Accessory Nerve, Open Approach, 00BS0ZZ — Excision of Hypoglossal Nerve, Open Approach, +18 more

Same operation — other Approach

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

00BN3ZZ — Excision of Acoustic Nerve, Percutaneous Approach, 00BN4ZZ — Excision of Acoustic Nerve, Percutaneous Endoscopic Approach

Same operation — other Qualifier

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

00BN0ZX — Excision of Acoustic Nerve, 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 CNS excision procedures (Central Nervous System 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.

005X3Z3 — Destruction of Thoracic Spinal Cord using Laser Interstitial Thermal Therapy, Percutaneous Approach, 005X3ZZ — Destruction of Thoracic Spinal Cord, Percutaneous Approach, 005X4Z3 — Destruction of Thoracic Spinal Cord using Laser Interstitial Thermal Therapy, Percutaneous Endoscopic Approach, 005X4ZZ — Destruction of Thoracic Spinal Cord, Percutaneous Endoscopic Approach, 005Y0Z3 — Destruction of Lumbar Spinal Cord using Laser Interstitial Thermal Therapy, Open Approach, 005Y0ZZ — Destruction of Lumbar Spinal Cord, Open Approach, 005Y3Z3 — Destruction of Lumbar Spinal Cord using Laser Interstitial Thermal Therapy, Percutaneous Approach, 005Y3ZZ — Destruction of Lumbar Spinal Cord, Percutaneous Approach, 005Y4Z3 — Destruction of Lumbar Spinal Cord using Laser Interstitial Thermal Therapy, Percutaneous Endoscopic Approach, 005Y4ZZ — Destruction of Lumbar Spinal Cord, Percutaneous Endoscopic Approach, 00D00ZZ — Extraction of Brain, Open Approach, 00D03ZZ — Extraction of Brain, Percutaneous Approach, 00D04ZZ — Extraction of Brain, Percutaneous Endoscopic Approach, 00D10ZZ — Extraction of Cerebral Meninges, Open Approach, 00D13ZZ — Extraction of Cerebral Meninges, Percutaneous Approach, 00D14ZZ — Extraction of Cerebral Meninges, Percutaneous Endoscopic Approach, 00D20ZZ — Extraction of Dura Mater, Open Approach, 00D23ZZ — Extraction of Dura Mater, Percutaneous Approach, 00D24ZZ — Extraction of Dura Mater, Percutaneous Endoscopic Approach, 00D70ZZ — Extraction of Cerebral Hemisphere, Open Approach, +132 more

Contextual Map

Every relationship of 00BN0ZZ 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 00BN0ZZ with these 5 related codes in Claim Check

PCS table

• 00B[PCS table]— CMS ICD-10-PCS tables
• Medical and Surgical — Section: Medical and Surgical[Section]: “Medical and Surgical”— CMS ICD-10-PCS tables
• Central Nervous System and Cranial Nerves — Body System: Central Nervous System and Cranial Nerves[Body System]: “Central Nervous System and Cranial Nerves”— CMS ICD-10-PCS tables
• Excision — Operation: Excision[Operation]: “Excision”— CMS ICD-10-PCS tables

MS-DRG participation

• DRG 023 — CRANIOTOMY WITH MAJOR DEVICE IMPLANT OR ACUTE COMPLEX CNS PRINCIPAL DIAGNOSIS WITH MCC OR ANTINEOPLASTIC IMPLANT OR EPILEPSY WITH NEUROSTIMULATOR[MS-DRG]: “CRANIOTOMY WITH MAJOR DEVICE IMPLANT OR ACUTE COMPLEX CNS PRINCIPAL DIAGNOSIS WITH MCC OR ANTINEOPLASTIC IMPLANT OR EPILEPSY WITH NEUROSTIMULATOR — Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis (MDC 01)”— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• DRG 024 — CRANIOTOMY WITH MAJOR DEVICE IMPLANT OR ACUTE COMPLEX CNS PRINCIPAL DIAGNOSIS WITHOUT MCC[MS-DRG]: “CRANIOTOMY WITH MAJOR DEVICE IMPLANT OR ACUTE COMPLEX CNS PRINCIPAL DIAGNOSIS WITHOUT MCC — Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis (MDC 01)”— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• DRG 025 — CRANIOTOMY AND ENDOVASCULAR INTRACRANIAL PROCEDURES WITH MCC[MS-DRG]: “CRANIOTOMY AND ENDOVASCULAR INTRACRANIAL PROCEDURES WITH MCC — Craniotomy and endovascular intracranial procedures (MDC 01)”— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• DRG 026 — CRANIOTOMY AND ENDOVASCULAR INTRACRANIAL PROCEDURES WITH CC[MS-DRG]: “CRANIOTOMY AND ENDOVASCULAR INTRACRANIAL PROCEDURES WITH CC — Craniotomy and endovascular intracranial procedures (MDC 01)”— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• DRG 027 — CRANIOTOMY AND ENDOVASCULAR INTRACRANIAL PROCEDURES WITHOUT CC/MCC[MS-DRG]: “CRANIOTOMY AND ENDOVASCULAR INTRACRANIAL PROCEDURES WITHOUT CC/MCC — Craniotomy and endovascular intracranial procedures (MDC 01)”— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• 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)

• CNS007 — CNS excision procedures[CCSR category]: “CNS excision procedures — Central Nervous System Procedures”— AHRQ CCSR for ICD-10-PCS Procedures (HCUP) · v2026.1

MDC crossing · diagnoses (4080)

• MDC 01 — Diseases and Disorders of the Nervous System[MDC crossing]: “Diseases and Disorders of the Nervous System — 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 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
• A02.21 — Salmonella meningitis[Same-MDC diagnosis]: “Salmonella meningitis — grouped in MDC 01, the diagnosis side of this code's crossing.”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• A06.6 — Amebic brain abscess[Same-MDC diagnosis]: “Amebic brain abscess — grouped in MDC 01, the diagnosis side of this code's crossing.”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• A17.0 — Tuberculous meningitis[Same-MDC diagnosis]: “Tuberculous meningitis — grouped in MDC 01, the diagnosis side of this code's crossing.”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• A17.1 — Meningeal tuberculoma[Same-MDC diagnosis]: “Meningeal tuberculoma — grouped in MDC 01, the diagnosis side of this code's crossing.”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• A17.81 — Tuberculoma of brain and spinal cord[Same-MDC diagnosis]: “Tuberculoma of brain and spinal cord — grouped in MDC 01, the diagnosis side of this code's crossing.”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• and 4075 more

Nearest codes

• 00B00ZZ — Excision of Brain, Open Approach[One axis away]— CMS ICD-10-PCS tables
• 00B10ZZ — Excision of Cerebral Meninges, Open Approach[One axis away]— CMS ICD-10-PCS tables
• 00B20ZZ — Excision of Dura Mater, Open Approach[One axis away]— CMS ICD-10-PCS tables
• 00B60ZZ — Excision of Cerebral Ventricle, Open Approach[One axis away]— CMS ICD-10-PCS tables
• 00B70ZZ — Excision of Cerebral Hemisphere, Open Approach[One axis away]— CMS ICD-10-PCS tables
• 00B80ZZ — Excision of Basal Ganglia, Open Approach[One axis away]— CMS ICD-10-PCS tables
• 00B90ZZ — Excision of Thalamus, Open Approach[One axis away]— CMS ICD-10-PCS tables
• 00BA0ZZ — Excision of Hypothalamus, Open Approach[One axis away]— CMS ICD-10-PCS tables