184 MS-DRG: MAJOR CHEST TRAUMA WITH CC
MS-DRG 184 groups Medicare inpatient hospital stays for: MAJOR CHEST TRAUMA WITH CC. This is a medical MS-DRG. It falls under MDC 04 (Diseases and Disorders of the Respiratory System).
Payment & Classification Data
Official CMS values from the FY2027 IPPS Final Rule Table 5.
| Major Diagnostic Category | MDC 04 — Diseases and Disorders of the Respiratory System |
| DRG Type | Medical |
| Severity Level | CC |
| Relative Weight | 1.0647 |
| Relative Weight (10% Cap Applied) | 1.0647 |
| Geometric Mean Length of Stay | 3.1 days |
| Arithmetic Mean Length of Stay | 3.7 days |
| Post-Acute Transfer DRG | No |
| Special Pay Transfer DRG | No |
Defining Codes (FY2027)
61 diagnosis codes can drive assignment here: M96.A4, M99.18, S11.021A, S11.022A, S11.023A, S11.024A, S11.025A, S11.029A, S22.31XB, S22.32XB, S22.39XB, S22.41XA and 49 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 184 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 04 — Diseases and Disorders of the Respiratory System[MDC]— CMS MS-DRG Definitions Manual · FY2027
Defining diagnoses (61)
- M96.A4 — Flail chest associated with chest compression and cardiopulmonary resuscitation[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- M99.18 — Subluxation complex (vertebral) of rib cage[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- S11.021A — Laceration without foreign body of trachea, initial encounter[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- S11.022A — Laceration with foreign body of trachea, initial encounter[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- S11.023A — Puncture wound without foreign body of trachea, initial encounter[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- S11.024A — Puncture wound with foreign body of trachea, initial encounter[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- S11.025A — Open bite of trachea, initial encounter[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- S11.029A — Unspecified open wound of trachea, initial encounter[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- and 53 more
DRG family
- DRG 183 — MAJOR CHEST TRAUMA WITH MCC[DRG family]: “MAJOR CHEST TRAUMA WITH MCC — same CMS DRG family (183-185), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 183-185) · FY2027
- DRG 185 — MAJOR CHEST TRAUMA WITHOUT CC/MCC[DRG family]: “MAJOR CHEST TRAUMA WITHOUT CC/MCC — same CMS DRG family (183-185), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 183-185) · 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