485 MS-DRG: KNEE PROCEDURES WITH PRINCIPAL DIAGNOSIS OF INFECTION WITH MCC
MS-DRG 485 groups Medicare inpatient hospital stays for: KNEE PROCEDURES WITH PRINCIPAL DIAGNOSIS OF INFECTION WITH MCC. This is a surgical MS-DRG. It falls under MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue).
Payment & Classification Data
Official CMS values from the FY2026 IPPS Final Rule Table 5.
MS-DRG 485 is not in the FY2027 MS-DRG list. The values below are CMS's FY2026 values and apply only to discharges in that fiscal year.
| Major Diagnostic Category | MDC 08 — Diseases and Disorders of the Musculoskeletal System and Connective Tissue |
| DRG Type | Surgical |
| Severity Level | MCC |
| Relative Weight | 3.2271 |
| Relative Weight (10% Cap Applied) | 3.2271 |
| Geometric Mean Length of Stay | 8.1 days |
| Arithmetic Mean Length of Stay | 9.6 days |
| Post-Acute Transfer DRG | No |
| Special Pay Transfer DRG | No |
Contextual Map
Every relationship of 485 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.
Major Diagnostic Category
- MDC 08 — Diseases and Disorders of the Musculoskeletal System and Connective Tissue[MDC]— CMS MS-DRG Definitions Manual
DRG family
- DRG 486 — KNEE PROCEDURES WITH PRINCIPAL DIAGNOSIS OF INFECTION WITH CC[DRG family]: “KNEE PROCEDURES WITH PRINCIPAL DIAGNOSIS OF INFECTION WITH CC — same CMS DRG family (485-487), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 485-487)
- DRG 487 — KNEE PROCEDURES WITH PRINCIPAL DIAGNOSIS OF INFECTION WITHOUT CC/MCC[DRG family]: “KNEE PROCEDURES WITH PRINCIPAL DIAGNOSIS OF INFECTION WITHOUT CC/MCC — same CMS DRG family (485-487), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 485-487)
Read from: CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v44. All data sources · How to read the labels · How MedCoder verifies its implementation
Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 28, 2026 · All releases and sources