MS-DRG v44.0 · MDC 08: Diseases and Disorders of the Musculoskeletal System and Connective Tissue
470 — Major Hip and Knee Joint Replacement or Reattachment of Lower Extremity without MCC
- Relative weight
- 1.9563
- Geometric mean LOS
- 2 days
- Arithmetic mean LOS
- 2.3 days
- Type
- Surgical
About MS-DRG 470
MS-DRG 470, Major Hip and Knee Joint Replacement or Reattachment of Lower Extremity without MCC, is a surgical DRG in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue) under MS-DRG version 44.0, which applies to inpatient discharges from October 1, 2026 through September 30, 2027.
Its FY2027 relative weight is 1.9563, so Medicare's base payment for this DRG is about 1.96 times the average inpatient case, before hospital-specific adjustments. The geometric mean length of stay is 2 days and the arithmetic mean is 2.3 days.
It belongs to a 2-level severity family: DRG 469 (with MCC or Total Ankle Replacement, weight 3.1085) and DRG 470 (without MCC, weight 1.9563). The highest-severity level carries 1.6 times the weight of the lowest, which is why documenting CC and MCC conditions matters.
It is subject to Medicare's post-acute care transfer policy, so payment can be reduced when a patient with a shorter-than-average stay is discharged to a skilled nursing facility, home health or another post-acute setting.
ICD-10-CM codes that group to DRG 470 (0)
This DRG is assigned by procedure, not by a diagnosis list.
Common questions about DRG 470
What is the relative weight of DRG 470?
- 1.9563 for FY2027 (MS-DRG v44.0), from the IPPS final rule Table 5.
What is the average length of stay for DRG 470?
- The geometric mean length of stay is 2 days; the arithmetic mean is 2.3 days.
Is DRG 470 medical or surgical?
- DRG 470 is a surgical DRG.