MS-DRG · FY 2027 v44.0
MS-DRG 449 – Revision of Hip or Knee Prosthesis
A Surgical DRG in MDC 08 (Diseases & Disorders of the Musculoskeletal System & Connective Tissue). Inpatient cases group to DRG 449 when one of the 42 ICD-10-PCS operating-room procedures listed below is reported. Its FY 2027 relative weight is 3.3004 with a geometric mean length of stay of 3.1 days.
Surgical DRG – assigned by operating-room procedure✓ Official CMS v44.0 dataset
3.3004
Relative Weight
3.1
Geometric Mean LOS (days)
4.8
Arithmetic Mean LOS (days)
42
Procedure Codes
How a case is assigned to DRG 449
The grouper first assigns the case to MDC 08 from the principal diagnosis, then matches a qualifying operating-room procedure from the ICD-10-PCS list below (this is a Surgical DRG).
ICD-10-PCS
Procedure Codes 42 codes · 12 categories
42 of 42 shown
0SW9 Lower Joints, Revision3 codes
0SWA Lower Joints, Revision3 codes
- 0SWA0JZ Revision of Synthetic Substitute in Right Hip Joint, Acetabular Surface, Open Approach
- 0SWA3JZ Revision of Synthetic Substitute in Right Hip Joint, Acetabular Surface, Percutaneous Approach
- 0SWA4JZ Revision of Synthetic Substitute in Right Hip Joint, Acetabular Surface, Percutaneous Endoscopic Approach
0SWB Lower Joints, Revision3 codes
0SWC Lower Joints, Revision6 codes
- 0SWC0JC Revision of Synthetic Substitute in Right Knee Joint, Patellar Surface, Open Approach
- 0SWC0JZ Revision of Synthetic Substitute in Right Knee Joint, Open Approach
- 0SWC3JC Revision of Synthetic Substitute in Right Knee Joint, Patellar Surface, Percutaneous Approach
- 0SWC3JZ Revision of Synthetic Substitute in Right Knee Joint, Percutaneous Approach
- 0SWC4JC Revision of Synthetic Substitute in Right Knee Joint, Patellar Surface, Percutaneous Endoscopic Approach
- 0SWC4JZ Revision of Synthetic Substitute in Right Knee Joint, Percutaneous Endoscopic Approach
0SWD Lower Joints, Revision6 codes
- 0SWD0JC Revision of Synthetic Substitute in Left Knee Joint, Patellar Surface, Open Approach
- 0SWD0JZ Revision of Synthetic Substitute in Left Knee Joint, Open Approach
- 0SWD3JC Revision of Synthetic Substitute in Left Knee Joint, Patellar Surface, Percutaneous Approach
- 0SWD3JZ Revision of Synthetic Substitute in Left Knee Joint, Percutaneous Approach
- 0SWD4JC Revision of Synthetic Substitute in Left Knee Joint, Patellar Surface, Percutaneous Endoscopic Approach
- 0SWD4JZ Revision of Synthetic Substitute in Left Knee Joint, Percutaneous Endoscopic Approach
0SWE Lower Joints, Revision3 codes
- 0SWE0JZ Revision of Synthetic Substitute in Left Hip Joint, Acetabular Surface, Open Approach
- 0SWE3JZ Revision of Synthetic Substitute in Left Hip Joint, Acetabular Surface, Percutaneous Approach
- 0SWE4JZ Revision of Synthetic Substitute in Left Hip Joint, Acetabular Surface, Percutaneous Endoscopic Approach
0SWR Lower Joints, Revision3 codes
- 0SWR0JZ Revision of Synthetic Substitute in Right Hip Joint, Femoral Surface, Open Approach
- 0SWR3JZ Revision of Synthetic Substitute in Right Hip Joint, Femoral Surface, Percutaneous Approach
- 0SWR4JZ Revision of Synthetic Substitute in Right Hip Joint, Femoral Surface, Percutaneous Endoscopic Approach
0SWS Lower Joints, Revision3 codes
0SWT Lower Joints, Revision3 codes
- 0SWT0JZ Revision of Synthetic Substitute in Right Knee Joint, Femoral Surface, Open Approach
- 0SWT3JZ Revision of Synthetic Substitute in Right Knee Joint, Femoral Surface, Percutaneous Approach
- 0SWT4JZ Revision of Synthetic Substitute in Right Knee Joint, Femoral Surface, Percutaneous Endoscopic Approach
0SWU Lower Joints, Revision3 codes
- 0SWU0JZ Revision of Synthetic Substitute in Left Knee Joint, Femoral Surface, Open Approach
- 0SWU3JZ Revision of Synthetic Substitute in Left Knee Joint, Femoral Surface, Percutaneous Approach
- 0SWU4JZ Revision of Synthetic Substitute in Left Knee Joint, Femoral Surface, Percutaneous Endoscopic Approach
0SWV Lower Joints, Revision3 codes
- 0SWV0JZ Revision of Synthetic Substitute in Right Knee Joint, Tibial Surface, Open Approach
- 0SWV3JZ Revision of Synthetic Substitute in Right Knee Joint, Tibial Surface, Percutaneous Approach
- 0SWV4JZ Revision of Synthetic Substitute in Right Knee Joint, Tibial Surface, Percutaneous Endoscopic Approach
0SWW Lower Joints, Revision3 codes
ICD-10-CM
Qualifying Diagnosis Codes
Diagnosis codes do not drive assignment for this DRG. Cases group here from the ICD-10-PCS procedure list below.
Frequently Asked Questions
What is MS-DRG 449?
MS-DRG 449 (Revision of Hip or Knee Prosthesis) is a surgical DRG in MDC 08 (Diseases & Disorders of the Musculoskeletal System & Connective Tissue). Its FY 2027 relative weight is 3.3004 with a geometric mean length of stay of 3.1 days.
How many procedure codes group to DRG 449?
42 ICD-10-PCS operating-room procedure codes group to this DRG.
What is the relative weight of DRG 449?
The FY 2027 relative weight of this DRG is 3.3004, meaning reimbursement of roughly 3.30 times the average Medicare inpatient case. Multiply by a hospital's blended base rate for the approximate payment.
← PreviousDRG 448 – Multiple Level Spinal Fusion Except Cervical without MCCNext →DRG 450 – Single Level Spinal Fusion Except Cervical with MCC
Source: CMS ICD-10 MS-DRG v44.0 Definitions Manual and the FY 2027 IPPS Final Rule (Table 5), effective October 1, 2026 through September 30, 2027. We publish the DRG assignments as CMS defines them and add the navigation, search, and code links.
