MS-DRG 597 — Malignant Breast Disorders with MCC
MDC 09 · Skin, Subcutaneous Tissue & Breast · Medical DRG · FY2026
| FY2026 relative weight | 1.6671 |
|---|---|
| Geometric mean LOS | 4.7 days |
| Arithmetic mean LOS | 6.5 days |
| Severity tier | with MCC |
| Post-acute transfer policy | No |
| Special payment provision | No |
Severity family — documentation moves the weight 2.27×
The same base condition splits by coded severity (CC/MCC). Weight deltas here are exactly what one documented comorbidity is worth:
| DRG | Title | FY2026 weight | GMLOS |
|---|---|---|---|
| 597 | Malignant Breast Disorders with MCC | 1.6671 | 4.7 |
| 598 | Malignant Breast Disorders with CC | 1.1313 | 3.4 |
| 599 | Malignant Breast Disorders without CC/MCC | 0.7332 | 2.4 |
Figures come from the official FY2026 IPPS tables and are payment inputs, not adjudicated amounts. DRG Calculator prices full claims — hospital-specific operating, capital, IME, DSH, uncompensated care and outlier math — and verifies results against the official pricer.