164
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 current fiscal year's IPPS Final Rule.
| Major Diagnostic Category | MDC 04 — Diseases and Disorders of the Respiratory System |
| DRG Type | Surgical |
| Severity Level | CC |
| Relative Weight | 2.524 |
| Relative Weight (10% Cap Applied) | 2.524 |
| Geometric Mean Length of Stay | 3.4 days |
| Arithmetic Mean Length of Stay | 4.3 days |
| Post-Acute Transfer DRG | Yes |
| Special Pay Transfer DRG | No |
Defining Codes (FY2026)
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.
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]
Defining procedures (2001)
- 025N0ZZ — Destruction of Pericardium, Open Approach [Grouper procedure]
- 025N3ZZ — Destruction of Pericardium, Percutaneous Approach [Grouper procedure]
- 025N4ZZ — Destruction of Pericardium, Percutaneous Endoscopic Approach [Grouper procedure]
- 025P0ZZ — Destruction of Pulmonary Trunk, Open Approach [Grouper procedure]
- 025P3ZZ — Destruction of Pulmonary Trunk, Percutaneous Approach [Grouper procedure]
- 025P4ZZ — Destruction of Pulmonary Trunk, Percutaneous Endoscopic Approach [Grouper procedure]
- 025Q0ZZ — Destruction of Right Pulmonary Artery, Open Approach [Grouper procedure]
- 025Q3ZZ — Destruction of Right Pulmonary Artery, Percutaneous Approach [Grouper procedure]
- and 1993 more