DRG 306
Medical DRGCardiac Congenital and Valvular Disorders with MCC
What is MS-DRG 306?
MS-DRG 306 is a Medical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 05 (MDC 05) with a Major Complication or Comorbidity (MCC). It maps to 146 ICD-10-CM diagnosis codes. For FY 2026 it carries a relative weight of 1.5758 with a geometric mean length of stay of 3.8 days and an arithmetic mean of 5.2 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 |
|---|---|---|---|
| 306 | Cardiac Congenital and Valvular Disorders with MCCThis page | 1.5758 | 3.8 days |
| 307 | Cardiac Congenital and Valvular Disorders without MCC | 0.9132 | 2.2 days |
Linked ICD-10-CM Diagnosis Mappings
- A52.01
Syphilitic aneurysm of aorta
BillableChapter 1 - A52.02
Syphilitic aortitis
BillableChapter 1 - B33.21
Viral endocarditis
BillableChapter 1 - I01.1
Acute rheumatic endocarditis
BillableChapter 9 - I05.0
Rheumatic mitral stenosis
BillableChapter 9 - I05.1
Rheumatic mitral insufficiency
BillableChapter 9 - I05.2
Rheumatic mitral stenosis with insufficiency
BillableChapter 9 - I05.8
Other rheumatic mitral valve diseases
BillableChapter 9 - I05.9
Rheumatic mitral valve disease, unspecified
BillableChapter 9 - I06.0
Rheumatic aortic stenosis
BillableChapter 9 - I06.1
Rheumatic aortic insufficiency
BillableChapter 9 - I06.2
Rheumatic aortic stenosis with insufficiency
BillableChapter 9 - I06.8
Other rheumatic aortic valve diseases
BillableChapter 9 - I06.9
Rheumatic aortic valve disease, unspecified
BillableChapter 9 - I07.0
Rheumatic tricuspid stenosis
BillableChapter 9 - I07.1
Rheumatic tricuspid insufficiency
BillableChapter 9 - I07.2
Rheumatic tricuspid stenosis and insufficiency
BillableChapter 9 - I07.8
Other rheumatic tricuspid valve diseases
BillableChapter 9 - I07.9
Rheumatic tricuspid valve disease, unspecified
BillableChapter 9 - I08.0
Rheumatic disorders of both mitral and aortic valves
BillableChapter 9 - I08.1
Rheumatic disorders of both mitral and tricuspid valves
BillableChapter 9 - I08.2
Rheumatic disorders of both aortic and tricuspid valves
BillableChapter 9 - I08.3
Combined rheumatic disorders of mitral, aortic and tricuspid valves
BillableChapter 9 - I08.8
Other rheumatic multiple valve diseases
BillableChapter 9 - I08.9
Rheumatic multiple valve disease, unspecified
BillableChapter 9 - I09.1
Rheumatic diseases of endocardium, valve unspecified
BillableChapter 9 - I09.89
Other specified rheumatic heart diseases
BillableChapter 9 - I23.4
Rupture of chordae tendineae as current complication following acute myocardial infarction
BillableChapter 9 - I23.5
Rupture of papillary muscle as current complication following acute myocardial infarction
BillableChapter 9 - I34.0
Nonrheumatic mitral (valve) insufficiency
BillableChapter 9 - I34.1
Nonrheumatic mitral (valve) prolapse
BillableChapter 9 - I34.2
Nonrheumatic mitral (valve) stenosis
BillableChapter 9 - I34.81
Nonrheumatic mitral (valve) annulus calcification
BillableChapter 9 - I34.89
Other nonrheumatic mitral valve disorders
BillableChapter 9 - I34.9
Nonrheumatic mitral valve disorder, unspecified
BillableChapter 9 - I35.0
Nonrheumatic aortic (valve) stenosis
BillableChapter 9 - I35.1
Nonrheumatic aortic (valve) insufficiency
BillableChapter 9 - I35.2
Nonrheumatic aortic (valve) stenosis with insufficiency
BillableChapter 9 - I35.8
Other nonrheumatic aortic valve disorders
BillableChapter 9 - I35.9
Nonrheumatic aortic valve disorder, unspecified
BillableChapter 9 - I36.0
Nonrheumatic tricuspid (valve) stenosis
BillableChapter 9 - I36.1
Nonrheumatic tricuspid (valve) insufficiency
BillableChapter 9 - I36.2
Nonrheumatic tricuspid (valve) stenosis with insufficiency
BillableChapter 9 - I36.8
Other nonrheumatic tricuspid valve disorders
BillableChapter 9 - I36.9
Nonrheumatic tricuspid valve disorder, unspecified
BillableChapter 9 - I37.0
Nonrheumatic pulmonary valve stenosis
BillableChapter 9 - I37.1
Nonrheumatic pulmonary valve insufficiency
BillableChapter 9 - I37.2
Nonrheumatic pulmonary valve stenosis with insufficiency
BillableChapter 9 - I37.8
Other nonrheumatic pulmonary valve disorders
BillableChapter 9 - I37.9
Nonrheumatic pulmonary valve disorder, unspecified
BillableChapter 9 - I38
Endocarditis, valve unspecified
BillableChapter 9 - I39
Endocarditis and heart valve disorders in diseases classified elsewhere
BillableChapter 9 - I51.1
Rupture of chordae tendineae, not elsewhere classified
BillableChapter 9 - I51.2
Rupture of papillary muscle, not elsewhere classified
BillableChapter 9 - Q20.0
Common arterial trunk
BillableChapter 17 - Q20.1
Double outlet right ventricle
BillableChapter 17 - Q20.2
Double outlet left ventricle
BillableChapter 17 - Q20.3
Discordant ventriculoarterial connection
BillableChapter 17 - Q20.4
Double inlet ventricle
BillableChapter 17 - Q20.5
Discordant atrioventricular connection
BillableChapter 17 - Q20.6
Isomerism of atrial appendages
BillableChapter 17 - Q20.8
Other congenital malformations of cardiac chambers and connections
BillableChapter 17 - Q20.9
Congenital malformation of cardiac chambers and connections, unspecified
BillableChapter 17 - Q21.0
Ventricular septal defect
BillableChapter 17 - Q21.10
Atrial septal defect, unspecified
BillableChapter 17 - Q21.11
Secundum atrial septal defect
BillableChapter 17 - Q21.12
Patent foramen ovale
BillableChapter 17 - Q21.13
Coronary sinus atrial septal defect
BillableChapter 17 - Q21.14
Superior sinus venosus atrial septal defect
BillableChapter 17 - Q21.15
Inferior sinus venosus atrial septal defect
BillableChapter 17 - Q21.16
Sinus venosus atrial septal defect, unspecified
BillableChapter 17 - Q21.19
Other specified atrial septal defect
BillableChapter 17 - Q21.20
Atrioventricular septal defect, unspecified as to partial or complete
BillableChapter 17 - Q21.21
Partial atrioventricular septal defect
BillableChapter 17 - Q21.22
Transitional atrioventricular septal defect
BillableChapter 17 - Q21.23
Complete atrioventricular septal defect
BillableChapter 17 - Q21.3
Tetralogy of Fallot
BillableChapter 17 - Q21.4
Aortopulmonary septal defect
BillableChapter 17 - Q21.8
Other congenital malformations of cardiac septa
BillableChapter 17 - Q21.9
Congenital malformation of cardiac septum, unspecified
BillableChapter 17 - Q22.0
Pulmonary valve atresia
BillableChapter 17 - Q22.1
Congenital pulmonary valve stenosis
BillableChapter 17 - Q22.2
Congenital pulmonary valve insufficiency
BillableChapter 17 - Q22.3
Other congenital malformations of pulmonary valve
BillableChapter 17 - Q22.4
Congenital tricuspid stenosis
BillableChapter 17 - Q22.5
Ebstein's anomaly
BillableChapter 17 - Q22.6
Hypoplastic right heart syndrome
BillableChapter 17 - Q22.8
Other congenital malformations of tricuspid valve
BillableChapter 17 - Q22.9
Congenital malformation of tricuspid valve, unspecified
BillableChapter 17 - Q23.0
Congenital stenosis of aortic valve
BillableChapter 17 - Q23.1
Congenital insufficiency of aortic valve
BillableChapter 17 - Q23.2
Congenital mitral stenosis
BillableChapter 17 - Q23.3
Congenital mitral insufficiency
BillableChapter 17 - Q23.4
Hypoplastic left heart syndrome
BillableChapter 17 - Q23.81
Bicuspid aortic valve
BillableChapter 17 - Q23.82
Congenital mitral valve cleft leaflet
BillableChapter 17 - Q23.88
Other congenital malformations of aortic and mitral valves
BillableChapter 17 - Q23.9
Congenital malformation of aortic and mitral valves, unspecified
BillableChapter 17 - Q24.0
Dextrocardia
BillableChapter 17 - Q24.1
Levocardia
BillableChapter 17 - Q24.2
Cor triatriatum
BillableChapter 17 - Q24.3
Pulmonary infundibular stenosis
BillableChapter 17 - Q24.4
Congenital subaortic stenosis
BillableChapter 17 - Q24.5
Malformation of coronary vessels
BillableChapter 17 - Q24.8
Other specified congenital malformations of heart
BillableChapter 17 - Q24.9
Congenital malformation of heart, unspecified
BillableChapter 17 - Q25.0
Patent ductus arteriosus
BillableChapter 17 - Q25.1
Coarctation of aorta
BillableChapter 17 - Q25.21
Interruption of aortic arch
BillableChapter 17 - Q25.29
Other atresia of aorta
BillableChapter 17 - Q25.3
Supravalvular aortic stenosis
BillableChapter 17 - Q25.40
Congenital malformation of aorta unspecified
BillableChapter 17 - Q25.41
Absence and aplasia of aorta
BillableChapter 17 - Q25.42
Hypoplasia of aorta
BillableChapter 17 - Q25.43
Congenital aneurysm of aorta
BillableChapter 17 - Q25.44
Congenital dilation of aorta
BillableChapter 17 - Q25.45
Double aortic arch
BillableChapter 17 - Q25.46
Tortuous aortic arch
BillableChapter 17 - Q25.47
Right aortic arch
BillableChapter 17 - Q25.48
Anomalous origin of subclavian artery
BillableChapter 17 - Q25.49
Other congenital malformations of aorta
BillableChapter 17 - Q25.5
Atresia of pulmonary artery
BillableChapter 17 - Q25.6
Stenosis of pulmonary artery
BillableChapter 17 - Q25.71
Coarctation of pulmonary artery
BillableChapter 17 - Q25.72
Congenital pulmonary arteriovenous malformation
BillableChapter 17 - Q25.79
Other congenital malformations of pulmonary artery
BillableChapter 17 - Q25.8
Other congenital malformations of other great arteries
BillableChapter 17 - Q25.9
Congenital malformation of great arteries, unspecified
BillableChapter 17 - Q26.0
Congenital stenosis of vena cava
BillableChapter 17 - Q26.1
Persistent left superior vena cava
BillableChapter 17 - Q26.2
Total anomalous pulmonary venous connection
BillableChapter 17 - Q26.3
Partial anomalous pulmonary venous connection
BillableChapter 17 - Q26.4
Anomalous pulmonary venous connection, unspecified
BillableChapter 17 - Q26.8
Other congenital malformations of great veins
BillableChapter 17 - Q26.9
Congenital malformation of great vein, unspecified
BillableChapter 17 - Q87.40
Marfan syndrome, unspecified
BillableChapter 17 - Q87.410
Marfan syndrome with aortic dilation
BillableChapter 17 - Q87.418
Marfan syndrome with other cardiovascular manifestations
BillableChapter 17 - Q87.42
Marfan syndrome with ocular manifestations
BillableChapter 17 - Q87.43
Marfan syndrome with skeletal manifestation
BillableChapter 17 - R01.0
Benign and innocent cardiac murmurs
BillableChapter 18 - R01.1
Cardiac murmur, unspecified
BillableChapter 18 - T82.01XA
Breakdown (mechanical) of heart valve prosthesis, initial encounter
BillableChapter 19 - T82.02XA
Displacement of heart valve prosthesis, initial encounter
BillableChapter 19 - T82.03XA
Leakage of heart valve prosthesis, initial encounter
BillableChapter 19 - T82.09XA
Other mechanical complication of heart valve prosthesis, initial encounter
BillableChapter 19
