MS-DRG v44.0 · MDC 05: Diseases and Disorders of the Circulatory System
303 — Atherosclerosis without MCC
Source: CMS MS-DRG v44.0 and FY2027 IPPS final rule. Page updated September 29, 2026.
- Relative weight
- 0.6612
- Geometric mean LOS
- 1.8 days
- Arithmetic mean LOS
- 2.2 days
- Type
- Medical
About MS-DRG 303
MS-DRG 303, Atherosclerosis without MCC, 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 0.6612, so Medicare's base payment for this DRG is about 0.66 times the average inpatient case (below average), before hospital-specific adjustments. The geometric mean length of stay is 1.8 days and the arithmetic mean is 2.2 days.
It belongs to a 2-level severity family: DRG 302 (with MCC, weight 1.1984) and DRG 303 (without MCC, weight 0.6612). The highest-severity level carries 1.8 times the weight of the lowest, which is why documenting CC and MCC conditions matters.
63 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 303 (63)
Chapter 9: Diseases of the circulatory system
- I25.10Atherosclerotic heart disease of native coronary artery without angina pectoris
- I25.110Atherosclerotic heart disease of native coronary artery with unstable angina pectoris
- I25.111Atherosclerotic heart disease of native coronary artery with angina pectoris with documented spasm
- I25.112Atherosclerotic heart disease of native coronary artery with refractory angina pectoris
- I25.118Atherosclerotic heart disease of native coronary artery with other forms of angina pectoris
- I25.119Atherosclerotic heart disease of native coronary artery with unspecified angina pectoris
- I25.2Old myocardial infarction
- I25.5Ischemic cardiomyopathy
- I25.6Silent myocardial ischemia
- I25.700Atherosclerosis of coronary artery bypass graft(s), unspecified, with unstable angina pectoris
- I25.701Atherosclerosis of coronary artery bypass graft(s), unspecified, with angina pectoris with documented spasm
- I25.702Atherosclerosis of coronary artery bypass graft(s), unspecified, with refractory angina pectoris
- I25.708Atherosclerosis of coronary artery bypass graft(s), unspecified, with other forms of angina pectoris
- I25.709Atherosclerosis of coronary artery bypass graft(s), unspecified, with unspecified angina pectoris
- I25.710Atherosclerosis of autologous vein coronary artery bypass graft(s) with unstable angina pectoris
- I25.711Atherosclerosis of autologous vein coronary artery bypass graft(s) with angina pectoris with documented spasm
- I25.712Atherosclerosis of autologous vein coronary artery bypass graft(s) with refractory angina pectoris
- I25.718Atherosclerosis of autologous vein coronary artery bypass graft(s) with other forms of angina pectoris
- I25.719Atherosclerosis of autologous vein coronary artery bypass graft(s) with unspecified angina pectoris
- I25.720Atherosclerosis of autologous artery coronary artery bypass graft(s) with unstable angina pectoris
- I25.721Atherosclerosis of autologous artery coronary artery bypass graft(s) with angina pectoris with documented spasm
- I25.722Atherosclerosis of autologous artery coronary artery bypass graft(s) with refractory angina pectoris
- I25.728Atherosclerosis of autologous artery coronary artery bypass graft(s) with other forms of angina pectoris
- I25.729Atherosclerosis of autologous artery coronary artery bypass graft(s) with unspecified angina pectoris
- I25.730Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with unstable angina pectoris
- I25.731Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with angina pectoris with documented spasm
- I25.732Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with refractory angina pectoris
- I25.738Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with other forms of angina pectoris
- I25.739Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with unspecified angina pectoris
- I25.750Atherosclerosis of native coronary artery of transplanted heart with unstable angina
- I25.751Atherosclerosis of native coronary artery of transplanted heart with angina pectoris with documented spasm
- I25.752Atherosclerosis of native coronary artery of transplanted heart with refractory angina pectoris
- I25.758Atherosclerosis of native coronary artery of transplanted heart with other forms of angina pectoris
- I25.759Atherosclerosis of native coronary artery of transplanted heart with unspecified angina pectoris
- I25.760Atherosclerosis of bypass graft of coronary artery of transplanted heart with unstable angina
- I25.761Atherosclerosis of bypass graft of coronary artery of transplanted heart with angina pectoris with documented spasm
- I25.762Atherosclerosis of bypass graft of coronary artery of transplanted heart with refractory angina pectoris
- I25.768Atherosclerosis of bypass graft of coronary artery of transplanted heart with other forms of angina pectoris
- I25.769Atherosclerosis of bypass graft of coronary artery of transplanted heart with unspecified angina pectoris
- I25.790Atherosclerosis of other coronary artery bypass graft(s) with unstable angina pectoris
- I25.791Atherosclerosis of other coronary artery bypass graft(s) with angina pectoris with documented spasm
- I25.792Atherosclerosis of other coronary artery bypass graft(s) with refractory angina pectoris
- I25.798Atherosclerosis of other coronary artery bypass graft(s) with other forms of angina pectoris
- I25.799Atherosclerosis of other coronary artery bypass graft(s) with unspecified angina pectoris
- I25.810Atherosclerosis of coronary artery bypass graft(s) without angina pectoris
- I25.811Atherosclerosis of native coronary artery of transplanted heart without angina pectoris
- I25.812Atherosclerosis of bypass graft of coronary artery of transplanted heart without angina pectoris
- I25.82Chronic total occlusion of coronary artery
- I25.83Coronary atherosclerosis due to lipid rich plaque
- I25.84Coronary atherosclerosis due to calcified coronary lesion
- I25.85Chronic coronary microvascular dysfunction
- I25.89Other forms of chronic ischemic heart disease
- I25.9Chronic ischemic heart disease, unspecified
- I51.3Intracardiac thrombosis, not elsewhere classified
- I51.7Cardiomegaly
- I51.89Other ill-defined heart diseases
- I51.9Heart disease, unspecified
- I52Other heart disorders in diseases classified elsewhere
- I87.8Other specified disorders of veins
- I87.9Disorder of vein, unspecified
- I99.8Other disorder of circulatory system
- I99.9Unspecified disorder of circulatory system
Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
Common questions about DRG 303
What is the relative weight of DRG 303?
- 0.6612 for FY2027 (MS-DRG v44.0), from the IPPS final rule Table 5.
What is the average length of stay for DRG 303?
- The geometric mean length of stay is 1.8 days; the arithmetic mean is 2.2 days.
Is DRG 303 medical or surgical?
- DRG 303 is a medical DRG.