MS-DRG v44.0 · MDC 05: Diseases and Disorders of the Circulatory System
311 — Angina Pectoris
- Relative weight
- 0.6684
- Geometric mean LOS
- 1.9 days
- Arithmetic mean LOS
- 2.3 days
- Type
- Medical
About MS-DRG 311
MS-DRG 311, Angina Pectoris, is a medical DRG in MDC 05 (Diseases and Disorders of the Circulatory System) under MS-DRG version 44.0, which applies to inpatient discharges from October 1, 2026 through September 30, 2027.
Its FY2027 relative weight is 0.6684, so Medicare's base payment for this DRG is about 0.67 times the average inpatient case (below average), before hospital-specific adjustments. The geometric mean length of stay is 1.9 days and the arithmetic mean is 2.3 days.
10 ICD-10-CM diagnosis codes are part of this DRG's grouping logic; they are listed below.
ICD-10-CM codes that group to DRG 311 (10)
Chapter 9: Diseases of the circulatory system
- I20.0Unstable angina
- I20.1Angina pectoris with documented spasm
- I20.2Refractory angina pectoris
- I20.81Angina pectoris with coronary microvascular dysfunction
- I20.89Other forms of angina pectoris
- I20.9Angina pectoris, unspecified
- I24.0Acute coronary thrombosis not resulting in myocardial infarction
- I24.81Acute coronary microvascular dysfunction
- I24.89Other forms of acute ischemic heart disease
- I24.9Acute ischemic heart disease, unspecified
Common questions about DRG 311
What is the relative weight of DRG 311?
- 0.6684 for FY2027 (MS-DRG v44.0), from the IPPS final rule Table 5.
What is the average length of stay for DRG 311?
- The geometric mean length of stay is 1.9 days; the arithmetic mean is 2.3 days.
Is DRG 311 medical or surgical?
- DRG 311 is a medical DRG.