056 MS-DRG: DEGENERATIVE NERVOUS SYSTEM DISORDERS WITH MCC
MS-DRG 056 groups Medicare inpatient hospital stays for: DEGENERATIVE NERVOUS SYSTEM DISORDERS WITH MCC. This is a medical MS-DRG. It falls under MDC 01 (Diseases and Disorders of the Nervous System).
Payment & Classification Data
Official CMS values from the FY2027 IPPS Final Rule Table 5.
| Major Diagnostic Category | MDC 01 — Diseases and Disorders of the Nervous System |
| DRG Type | Medical |
| Severity Level | MCC |
| Relative Weight | 2.2655 |
| Relative Weight (10% Cap Applied) | 2.2655 |
| Geometric Mean Length of Stay | 5.4 days |
| Arithmetic Mean Length of Stay | 8.5 days |
| Post-Acute Transfer DRG | Yes |
| Special Pay Transfer DRG | No |
Defining Codes (FY2027)
369 diagnosis codes can drive assignment here: A52.10, A52.11, A52.12, A52.15, A52.16, A52.17, A52.19, A52.3, A81.00, A81.01, A81.09, A81.1 and 357 more.
From the CMS MS-DRG Definitions Manual (Appendices B and E). Assignment also depends on severity, discharge status and the rest of the claim.
Contextual Map
Every relationship of 056 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.
Major Diagnostic Category
- MDC 01 — Diseases and Disorders of the Nervous System[MDC]— CMS MS-DRG Definitions Manual · FY2027
Defining diagnoses (369)
- A52.10 — Symptomatic neurosyphilis, unspecified[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- A52.11 — Tabes dorsalis[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- A52.12 — Other cerebrospinal syphilis[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- A52.15 — Late syphilitic neuropathy[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- A52.16 — Charcôt's arthropathy (tabetic)[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- A52.17 — General paresis[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- A52.19 — Other symptomatic neurosyphilis[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- A52.3 — Neurosyphilis, unspecified[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- and 361 more
DRG family
- DRG 057 — DEGENERATIVE NERVOUS SYSTEM DISORDERS WITHOUT MCC[DRG family]: “DEGENERATIVE NERVOUS SYSTEM DISORDERS WITHOUT MCC — same CMS DRG family (056-057), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 056-057) · FY2027
Read from: 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. 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