0N950ZZ

Potential MS-DRG Relationships (FY2026)

The MS-DRG grouper treats this as an operating room procedure. It appears in the surgical logic of 6 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 24 — Craniotomy for Multiple Significant Trauma: DRG 955

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.

0N900ZZ — Drainage of Skull, Open Approach, 0N910ZZ — Drainage of Frontal Bone, Open Approach, 0N930ZZ — Drainage of Right Parietal Bone, Open Approach, 0N940ZZ — Drainage of Left Parietal Bone, Open Approach, 0N960ZZ — Drainage of Left Temporal Bone, Open Approach, 0N970ZZ — Drainage of Occipital Bone, Open Approach, 0N9B0ZZ — Drainage of Nasal Bone, Open Approach, 0N9C0ZZ — Drainage of Sphenoid Bone, Open Approach, +14 more

Same operation — other Approach

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

0N953ZZ — Drainage of Right Temporal Bone, Percutaneous Approach, 0N954ZZ — Drainage of Right Temporal Bone, Percutaneous Endoscopic Approach

Same operation — other Device

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

0N9500Z — Drainage of Right Temporal Bone with Drainage Device, Open Approach

Same operation — other Qualifier

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

0N950ZX — Drainage of Right Temporal Bone, Open Approach, Diagnostic

Contextual Map

Every relationship of 0N950ZZ 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

• 0N9[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 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)”
• 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)”
• 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)”
• 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)”
• 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)”
• DRG 955 — CRANIOTOMY FOR MULTIPLE SIGNIFICANT TRAUMA [MS-DRG]: “CRANIOTOMY FOR MULTIPLE SIGNIFICANT TRAUMA — Craniotomy for Multiple Significant Trauma (MDC 24)”

MDC crossing · diagnoses (11364)

• 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.”
• MDC 24 — Multiple Significant Trauma [MDC crossing]: “Multiple Significant Trauma — 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.”
• A02.21 — Salmonella meningitis [Same-MDC diagnosis]: “Salmonella meningitis — grouped in MDC 01, the diagnosis side of this code's crossing.” · check together
• A06.6 — Amebic brain abscess [Same-MDC diagnosis]: “Amebic brain abscess — grouped in MDC 01, the diagnosis side of this code's crossing.” · check together
• A17.0 — Tuberculous meningitis [Same-MDC diagnosis]: “Tuberculous meningitis — grouped in MDC 01, the diagnosis side of this code's crossing.” · check together
• A17.1 — Meningeal tuberculoma [Same-MDC diagnosis]: “Meningeal tuberculoma — grouped in MDC 01, the diagnosis side of this code's crossing.” · check together
• 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.” · check together
• and 11359 more

Nearest codes

• 0N900ZZ — Drainage of Skull, Open Approach [One axis away]
• 0N910ZZ — Drainage of Frontal Bone, Open Approach [One axis away]
• 0N930ZZ — Drainage of Right Parietal Bone, Open Approach [One axis away]
• 0N940ZZ — Drainage of Left Parietal Bone, Open Approach [One axis away]
• 0N9500Z — Drainage of Right Temporal Bone with Drainage Device, Open Approach [One axis away]
• 0N950ZX — Drainage of Right Temporal Bone, Open Approach, Diagnostic [One axis away]
• 0N953ZZ — Drainage of Right Temporal Bone, Percutaneous Approach [One axis away]
• 0N954ZZ — Drainage of Right Temporal Bone, Percutaneous Endoscopic Approach [One axis away]