01PY42Z

Potential MS-DRG Relationships (FY2026)

The MS-DRG grouper treats this as an operating room procedure. It appears in the surgical logic of 3 MS-DRGs:

• MDC 01 — Peripheral, Cranial Nerve and Other Nervous System Procedures: DRG 040, DRG 041, DRG 042

From the CMS MS-DRG Definitions Manual, Appendix E. Actual DRG assignment depends on the complete claim.

Contextual Map

Every relationship of 01PY42Z 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

• 01P[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 040 — PERIPHERAL, CRANIAL NERVE AND OTHER NERVOUS SYSTEM PROCEDURES WITH MCC [MS-DRG]: “PERIPHERAL, CRANIAL NERVE AND OTHER NERVOUS SYSTEM PROCEDURES WITH MCC — Peripheral, Cranial Nerve and Other Nervous System Procedures (MDC 01)”
• DRG 041 — PERIPHERAL, CRANIAL NERVE AND OTHER NERVOUS SYSTEM PROCEDURES WITH CC OR PERIPHERAL NEUROSTIMULATOR [MS-DRG]: “PERIPHERAL, CRANIAL NERVE AND OTHER NERVOUS SYSTEM PROCEDURES WITH CC OR PERIPHERAL NEUROSTIMULATOR — Peripheral, Cranial Nerve and Other Nervous System Procedures (MDC 01)”
• DRG 042 — PERIPHERAL, CRANIAL NERVE AND OTHER NERVOUS SYSTEM PROCEDURES WITHOUT CC/MCC [MS-DRG]: “PERIPHERAL, CRANIAL NERVE AND OTHER NERVOUS SYSTEM PROCEDURES WITHOUT CC/MCC — Peripheral, Cranial Nerve and Other Nervous System Procedures (MDC 01)”

MDC crossing · diagnoses (2636)

• 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.”
• 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 2631 more

Nearest codes

• 01PY02Z — Removal of Monitoring Device from Peripheral Nerve, Open Approach [One axis away]
• 01PY32Z — Removal of Monitoring Device from Peripheral Nerve, Percutaneous Approach [One axis away]
• 01PY40Z — Removal of Drainage Device from Peripheral Nerve, Percutaneous Endoscopic Approach [One axis away]
• 01PY47Z — Removal of Autologous Tissue Substitute from Peripheral Nerve, Percutaneous Endoscopic Approach [One axis away]
• 01PY4MZ — Removal of Neurostimulator Lead from Peripheral Nerve, Percutaneous Endoscopic Approach [One axis away]
• 01PY4YZ — Removal of Other Device from Peripheral Nerve, Percutaneous Endoscopic Approach [One axis away]
• 01PYX2Z — Removal of Monitoring Device from Peripheral Nerve, External Approach [One axis away]