MS-DRG 308: CARDIAC ARRHYTHMIA AND CONDUCTION DISORDERS WITH MCC
MS-DRG 308 is cardiac arrhythmia and conduction disorders with mcc, in MDC 05 (a medical DRG), at the with-MCC (major complication or comorbidity) level. Its FY2027 relative weight is 1.1806, so a case here pays more than the average Medicare inpatient stay (weight 1.0), with a geometric mean length of stay of 3.30 days. 61 ICD-10-CM principal diagnoses group into MS-DRGs 308–310 under the CMS definitions manual; the most-searched are listed below.
FY2027 payment factors
- Relative weight
- 1.1806
- Geometric mean LOS
- 3.30
- Arithmetic mean LOS
- 4.40
- Post-acute transfer
- No
Principal diagnoses that group to MS-DRGs 308–310
From the CMS MS-DRG definitions manual’s principal-diagnosis index: 61 ICD-10-CM codes route here, and the CC/MCC status of the secondary diagnoses decides which of 308–310 the case lands in. The 24 most-searched:
- I48.91Unspecified atrial fibrillation
- I48.0Paroxysmal atrial fibrillation
- I44.2Atrioventricular block, complete
- I47.20Ventricular tachycardia, unspecified
- I48.20Chronic atrial fibrillation, unspecified
- R00.0Tachycardia, unspecified
- R00.1Bradycardia, unspecified
- R00.2Palpitations
- I47.10Supraventricular tachycardia, unspecified
- I48.19Other persistent atrial fibrillation
- I48.92Unspecified atrial flutter
- I49.3Ventricular premature depolarization
- I49.5Sick sinus syndrome
- I44.1Atrioventricular block, second degree
- I44.7Left bundle-branch block, unspecified
- I47.19Other supraventricular tachycardia
- I48.11Longstanding persistent atrial fibrillation
- I48.21Permanent atrial fibrillation
- I49.9Cardiac arrhythmia, unspecified
- I44.0Atrioventricular block, first degree
- I45.10Unspecified right bundle-branch block
- I47.29Other ventricular tachycardia
- I48.3Typical atrial flutter
- I49.1Atrial premature depolarization
37 more codes group here. Open any code above for its full hierarchy, or check a whole claim in the free DRG calculator.
The severity splits
Same base DRG, split by whether a secondary diagnosis is a CC or MCC. The last column is the weight change from MS-DRG 308.
| 308 | CARDIAC ARRHYTHMIA AND CONDUCTION DISORDERS WITH MCC | 1.1806 | |
| 309 | CARDIAC ARRHYTHMIA AND CONDUCTION DISORDERS WITH CC | 0.7316 | -0.4490 |
| 310 | CARDIAC ARRHYTHMIA AND CONDUCTION DISORDERS WITHOUT CC/MCC | 0.5680 | -0.6126 |
Choosing the principal diagnosis: Atrial fibrillation ICD-10 codes.
All FY2027 MS-DRGs · MDC 05