557 MS-DRG: TENDONITIS, MYOSITIS AND BURSITIS WITH MCC
MS-DRG 557 groups Medicare inpatient hospital stays for: TENDONITIS, MYOSITIS AND BURSITIS WITH MCC. This is a medical 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 FY2027 IPPS Final Rule Table 5.
| Major Diagnostic Category | MDC 08 — Diseases and Disorders of the Musculoskeletal System and Connective Tissue |
| DRG Type | Medical |
| Severity Level | MCC |
| Relative Weight | 1.489 |
| Relative Weight (10% Cap Applied) | 1.489 |
| Geometric Mean Length of Stay | 4.6 days |
| Arithmetic Mean Length of Stay | 6 days |
| Post-Acute Transfer DRG | Yes |
| Special Pay Transfer DRG | No |
Defining Codes (FY2027)
1,061 diagnosis codes can drive assignment here: A52.78, M24.20, M24.211, M24.212, M24.219, M24.221, M24.222, M24.229, M24.231, M24.232, M24.239, M24.241 and 1,049 more.
From the CMS MS-DRG Definitions Manual (Appendices B and E). Assignment also depends on severity, discharge status and the rest of the claim.
Contextual Map
Every relationship of 557 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 · FY2027
Defining diagnoses (1061)
- A52.78 — Syphilis of other musculoskeletal tissue[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- M24.20 — Disorder of ligament, unspecified site[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- M24.211 — Disorder of ligament, right shoulder[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- M24.212 — Disorder of ligament, left shoulder[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- M24.219 — Disorder of ligament, unspecified shoulder[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- M24.221 — Disorder of ligament, right elbow[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- M24.222 — Disorder of ligament, left elbow[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- M24.229 — Disorder of ligament, unspecified elbow[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- and 1053 more
DRG family
- DRG 558 — TENDONITIS, MYOSITIS AND BURSITIS WITHOUT MCC[DRG family]: “TENDONITIS, MYOSITIS AND BURSITIS WITHOUT MCC — same CMS DRG family (557-558), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 557-558) · FY2027
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 20, 2026 · All releases and sources