311 MS-DRG: ANGINA PECTORIS
MS-DRG 311 groups Medicare inpatient hospital stays for: ANGINA PECTORIS. This is a medical MS-DRG. It falls under MDC 05 (Diseases and Disorders of the Circulatory System).
Payment & Classification Data
Official CMS values from the FY2027 IPPS Final Rule Table 5.
| Major Diagnostic Category | MDC 05 — Diseases and Disorders of the Circulatory System |
| DRG Type | Medical |
| Severity Level | N/A |
| Relative Weight | 0.6684 |
| Relative Weight (10% Cap Applied) | 0.6684 |
| Geometric Mean Length of Stay | 1.9 days |
| Arithmetic Mean Length of Stay | 2.3 days |
| Post-Acute Transfer DRG | No |
| Special Pay Transfer DRG | No |
Defining Codes (FY2027)
10 diagnosis codes can drive assignment here: I20.0, I20.1, I20.2, I20.81, I20.89, I20.9, I24.0, I24.81, I24.89, I24.9.
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 311 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 05 — Diseases and Disorders of the Circulatory System[MDC]— CMS MS-DRG Definitions Manual · FY2027
Defining diagnoses (10)
- I20.0 — Unstable angina[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- I20.1 — Angina pectoris with documented spasm[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- I20.2 — Refractory angina pectoris[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- I20.81 — Angina pectoris with coronary microvascular dysfunction[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- I20.89 — Other forms of angina pectoris[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- I20.9 — Angina pectoris, unspecified[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- I24.0 — Acute coronary thrombosis not resulting in myocardial infarction[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- I24.81 — Acute coronary microvascular dysfunction[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- and 2 more
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