MS-DRG lookup — FY2026 weights, GMLOS & severity splits
All 772 FY2026 MS-DRGs (grouper v43): relative weight, geometric and arithmetic mean length of stay, and the full severity family — so you can see exactly what one documented CC or MCC changes.
About MS-DRG weights and GMLOS
Each MS-DRG carries a relative weight that scales the hospital's base rate; geometric mean length of stay (GMLOS) is the benchmark used for transfer-payment proration, and the arithmetic mean (AMLOS) describes the average stay. CMS recalibrates all three every fiscal year — these figures are FY2026 (October 1, 2025 – September 30, 2026), grouper version 43.