MS-DRG v44.0 · MDC 05: Diseases and Disorders of the Circulatory System
231 — Coronary Bypass with PTCA with MCC
- Relative weight
- 8.7788
- Geometric mean LOS
- 10.3 days
- Arithmetic mean LOS
- 11.9 days
- Type
- Surgical
About MS-DRG 231
MS-DRG 231, Coronary Bypass with PTCA with MCC, is a surgical 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 8.7788, so Medicare's base payment for this DRG is about 8.78 times the average inpatient case, before hospital-specific adjustments. The geometric mean length of stay is 10.3 days and the arithmetic mean is 11.9 days.
It belongs to a 2-level severity family: DRG 231 (with MCC, weight 8.7788) and DRG 232 (without MCC, weight 6.2171). The highest-severity level carries 1.4 times the weight of the lowest, which is why documenting CC and MCC conditions matters.
ICD-10-CM codes that group to DRG 231 (0)
This DRG is assigned by procedure, not by a diagnosis list.
Common questions about DRG 231
What is the relative weight of DRG 231?
- 8.7788 for FY2027 (MS-DRG v44.0), from the IPPS final rule Table 5.
What is the average length of stay for DRG 231?
- The geometric mean length of stay is 10.3 days; the arithmetic mean is 11.9 days.
Is DRG 231 medical or surgical?
- DRG 231 is a surgical DRG.