DRG 303
Medical DRGAtherosclerosis without MCC
What is MS-DRG 303?
MS-DRG 303 is a Medical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 05 (MDC 05) without a significant Complication or Comorbidity. It maps to 63 ICD-10-CM diagnosis codes. For FY 2026 it carries a relative weight of 0.6732 with a geometric mean length of stay of 1.8 days and an arithmetic mean of 2.3 days. Hospitals use this grouping to determine reimbursement for inpatient stays under Medicare.
FY 2026 Payment Data
Official values from Table 5 of the FY 2026 IPPS Final Rule (CMS).
Related MS-DRGs in This Severity Group
The same clinical condition is split into separate DRGs by complication severity. MCC pays more than CC, which pays more than no CC/MCC.
| DRG | Title | Rel. Weight | GMLOS |
|---|---|---|---|
| 302 | Atherosclerosis with MCC | 1.1966 | 2.9 days |
| 303 | Atherosclerosis without MCCThis page | 0.6732 | 1.8 days |
Linked ICD-10-CM Diagnosis Mappings
- I25.10
Atherosclerotic heart disease of native coronary artery without angina pectoris
BillableChapter 9 - I25.110
Atherosclerotic heart disease of native coronary artery with unstable angina pectoris
BillableChapter 9 - I25.111
Atherosclerotic heart disease of native coronary artery with angina pectoris with documented spasm
BillableChapter 9 - I25.112
Atherosclerotic heart disease of native coronary artery with refractory angina pectoris
BillableChapter 9 - I25.118
Atherosclerotic heart disease of native coronary artery with other forms of angina pectoris
BillableChapter 9 - I25.119
Atherosclerotic heart disease of native coronary artery with unspecified angina pectoris
BillableChapter 9 - I25.2
Old myocardial infarction
BillableChapter 9 - I25.5
Ischemic cardiomyopathy
BillableChapter 9 - I25.6
Silent myocardial ischemia
BillableChapter 9 - I25.700
Atherosclerosis of coronary artery bypass graft(s), unspecified, with unstable angina pectoris
BillableChapter 9 - I25.701
Atherosclerosis of coronary artery bypass graft(s), unspecified, with angina pectoris with documented spasm
BillableChapter 9 - I25.702
Atherosclerosis of coronary artery bypass graft(s), unspecified, with refractory angina pectoris
BillableChapter 9 - I25.708
Atherosclerosis of coronary artery bypass graft(s), unspecified, with other forms of angina pectoris
BillableChapter 9 - I25.709
Atherosclerosis of coronary artery bypass graft(s), unspecified, with unspecified angina pectoris
BillableChapter 9 - I25.710
Atherosclerosis of autologous vein coronary artery bypass graft(s) with unstable angina pectoris
BillableChapter 9 - I25.711
Atherosclerosis of autologous vein coronary artery bypass graft(s) with angina pectoris with documented spasm
BillableChapter 9 - I25.712
Atherosclerosis of autologous vein coronary artery bypass graft(s) with refractory angina pectoris
BillableChapter 9 - I25.718
Atherosclerosis of autologous vein coronary artery bypass graft(s) with other forms of angina pectoris
BillableChapter 9 - I25.719
Atherosclerosis of autologous vein coronary artery bypass graft(s) with unspecified angina pectoris
BillableChapter 9 - I25.720
Atherosclerosis of autologous artery coronary artery bypass graft(s) with unstable angina pectoris
BillableChapter 9 - I25.721
Atherosclerosis of autologous artery coronary artery bypass graft(s) with angina pectoris with documented spasm
BillableChapter 9 - I25.722
Atherosclerosis of autologous artery coronary artery bypass graft(s) with refractory angina pectoris
BillableChapter 9 - I25.728
Atherosclerosis of autologous artery coronary artery bypass graft(s) with other forms of angina pectoris
BillableChapter 9 - I25.729
Atherosclerosis of autologous artery coronary artery bypass graft(s) with unspecified angina pectoris
BillableChapter 9 - I25.730
Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with unstable angina pectoris
BillableChapter 9 - I25.731
Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with angina pectoris with documented spasm
BillableChapter 9 - I25.732
Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with refractory angina pectoris
BillableChapter 9 - I25.738
Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with other forms of angina pectoris
BillableChapter 9 - I25.739
Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with unspecified angina pectoris
BillableChapter 9 - I25.750
Atherosclerosis of native coronary artery of transplanted heart with unstable angina
BillableChapter 9 - I25.751
Atherosclerosis of native coronary artery of transplanted heart with angina pectoris with documented spasm
BillableChapter 9 - I25.752
Atherosclerosis of native coronary artery of transplanted heart with refractory angina pectoris
BillableChapter 9 - I25.758
Atherosclerosis of native coronary artery of transplanted heart with other forms of angina pectoris
BillableChapter 9 - I25.759
Atherosclerosis of native coronary artery of transplanted heart with unspecified angina pectoris
BillableChapter 9 - I25.760
Atherosclerosis of bypass graft of coronary artery of transplanted heart with unstable angina
BillableChapter 9 - I25.761
Atherosclerosis of bypass graft of coronary artery of transplanted heart with angina pectoris with documented spasm
BillableChapter 9 - I25.762
Atherosclerosis of bypass graft of coronary artery of transplanted heart with refractory angina pectoris
BillableChapter 9 - I25.768
Atherosclerosis of bypass graft of coronary artery of transplanted heart with other forms of angina pectoris
BillableChapter 9 - I25.769
Atherosclerosis of bypass graft of coronary artery of transplanted heart with unspecified angina pectoris
BillableChapter 9 - I25.790
Atherosclerosis of other coronary artery bypass graft(s) with unstable angina pectoris
BillableChapter 9 - I25.791
Atherosclerosis of other coronary artery bypass graft(s) with angina pectoris with documented spasm
BillableChapter 9 - I25.792
Atherosclerosis of other coronary artery bypass graft(s) with refractory angina pectoris
BillableChapter 9 - I25.798
Atherosclerosis of other coronary artery bypass graft(s) with other forms of angina pectoris
BillableChapter 9 - I25.799
Atherosclerosis of other coronary artery bypass graft(s) with unspecified angina pectoris
BillableChapter 9 - I25.810
Atherosclerosis of coronary artery bypass graft(s) without angina pectoris
BillableChapter 9 - I25.811
Atherosclerosis of native coronary artery of transplanted heart without angina pectoris
BillableChapter 9 - I25.812
Atherosclerosis of bypass graft of coronary artery of transplanted heart without angina pectoris
BillableChapter 9 - I25.82
Chronic total occlusion of coronary artery
BillableChapter 9 - I25.83
Coronary atherosclerosis due to lipid rich plaque
BillableChapter 9 - I25.84
Coronary atherosclerosis due to calcified coronary lesion
BillableChapter 9 - I25.85
Chronic coronary microvascular dysfunction
BillableChapter 9 - I25.89
Other forms of chronic ischemic heart disease
BillableChapter 9 - I25.9
Chronic ischemic heart disease, unspecified
BillableChapter 9 - I51.3
Intracardiac thrombosis, not elsewhere classified
BillableChapter 9 - I51.7
Cardiomegaly
BillableChapter 9 - I51.89
Other ill-defined heart diseases
BillableChapter 9 - I51.9
Heart disease, unspecified
BillableChapter 9 - I52
Other heart disorders in diseases classified elsewhere
BillableChapter 9 - I87.8
Other specified disorders of veins
BillableChapter 9 - I87.9
Disorder of vein, unspecified
BillableChapter 9 - I99.8
Other disorder of circulatory system
BillableChapter 9 - I99.9
Unspecified disorder of circulatory system
BillableChapter 9 - R93.1
Abnormal findings on diagnostic imaging of heart and coronary circulation
BillableChapter 18