164 MS-DRG: MAJOR CHEST PROCEDURES WITH CC
MS-DRG 164 groups Medicare inpatient hospital stays for: MAJOR CHEST PROCEDURES WITH CC. This is a surgical 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 | Surgical |
| Severity Level | CC |
| Relative Weight | 2.5157 |
| Relative Weight (10% Cap Applied) | 2.5157 |
| Geometric Mean Length of Stay | 3.2 days |
| Arithmetic Mean Length of Stay | 4 days |
| Post-Acute Transfer DRG | Yes |
| Special Pay Transfer DRG | No |
Defining Codes (FY2027)
2,001 procedure codes appear in its surgical logic (Major Chest Procedures: 2,001): 025N0ZZ, 025N3ZZ, 025N4ZZ, 025P0ZZ, 025P3ZZ, 025P4ZZ, 025Q0ZZ, 025Q3ZZ, 025Q4ZZ, 025R0ZZ, 025R3ZZ, 025R4ZZ and 1,989 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.
Surgical Precedence (FY2027)
Within MDC 04, this DRG ranks 1 of 3 in CMS's surgical-class precedence order. When a claim qualifies for more than one surgical DRG in this MDC, the highest-ranked class applies.
- 1. Major Chest Procedures (DRGs 163-165) — this DRG
- 2. Ultrasound Accelerated and Other Thrombolysis with Principal Diagnosis Pulmonary Embolism (DRGs 173)
- 3. Other Respiratory System O.R. Procedures (DRGs 166-168)
From the CMS MS-DRG Definitions Manual, Appendix D. Actual DRG assignment depends on the complete claim.
Contextual Map
Every relationship of 164 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 procedures (2001)
- 025N0ZZ — Destruction of Pericardium, Open Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- 025N3ZZ — Destruction of Pericardium, Percutaneous Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- 025N4ZZ — Destruction of Pericardium, Percutaneous Endoscopic Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- 025P0ZZ — Destruction of Pulmonary Trunk, Open Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- 025P3ZZ — Destruction of Pulmonary Trunk, Percutaneous Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- 025P4ZZ — Destruction of Pulmonary Trunk, Percutaneous Endoscopic Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- 025Q0ZZ — Destruction of Right Pulmonary Artery, Open Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- 025Q3ZZ — Destruction of Right Pulmonary Artery, Percutaneous Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- and 1993 more
DRG family
- DRG 163 — MAJOR CHEST PROCEDURES WITH MCC[DRG family]: “MAJOR CHEST PROCEDURES WITH MCC — same CMS DRG family (163-165), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 163-165) · FY2027
- DRG 165 — MAJOR CHEST PROCEDURES WITHOUT CC/MCC[DRG family]: “MAJOR CHEST PROCEDURES WITHOUT CC/MCC — same CMS DRG family (163-165), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 163-165) · 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