MS-DRG v44.0 · MDC 08: Diseases and Disorders of the Musculoskeletal System and Connective Tissue
449 — Revision of Hip or Knee Prosthesis
Source: CMS MS-DRG v44.0 and FY2027 IPPS final rule. Page updated September 29, 2026.
- Relative weight
- 3.2995
- Geometric mean LOS
- 3.1 days
- Arithmetic mean LOS
- 4.8 days
- Type
- Surgical
About MS-DRG 449
MS-DRG 449, Revision of Hip or Knee Prosthesis, 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 3.2995, so Medicare's base payment for this DRG is about 3.30 times the average inpatient case, before hospital-specific adjustments. The geometric mean length of stay is 3.1 days and the arithmetic mean is 4.8 days.
ICD-10-CM codes that group to DRG 449 (0)
This DRG is assigned by procedure, not by a diagnosis list.
Common questions about DRG 449
What is the relative weight of DRG 449?
- 3.2995 for FY2027 (MS-DRG v44.0), from the IPPS final rule Table 5.
What is the average length of stay for DRG 449?
- The geometric mean length of stay is 3.1 days; the arithmetic mean is 4.8 days.
Is DRG 449 medical or surgical?
- DRG 449 is a surgical DRG.