MS-DRG 853 — Infectious and Parasitic Diseases with O.R. Procedures with MCC
MDC 18 · Infectious & Parasitic Diseases · Surgical DRG · FY2026
| FY2026 relative weight | 4.9386 |
|---|---|
| Geometric mean LOS | 9.3 days |
| Arithmetic mean LOS | 12.4 days |
| Severity tier | with MCC |
| Post-acute transfer policy | Yes — per-diem reduction applies to qualifying transfers |
| Special payment provision | No |
Severity family — documentation moves the weight 3.30×
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 |
|---|---|---|---|
| 853 | Infectious and Parasitic Diseases with O.R. Procedures with MCC | 4.9386 | 9.3 |
| 854 | Infectious and Parasitic Diseases with O.R. Procedures with CC | 1.9981 | 4.9 |
| 855 | Infectious and Parasitic Diseases with O.R. Procedures without CC/MCC | 1.4972 | 2.9 |
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.