MS-DRG 186 — Pleural Effusion with MCC
MDC 04 · Respiratory System · Medical DRG · FY2026
| FY2026 relative weight | 1.5585 |
|---|---|
| Geometric mean LOS | 4.2 days |
| Arithmetic mean LOS | 5.6 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 2.17×
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 |
|---|---|---|---|
| 186 | Pleural Effusion with MCC | 1.5585 | 4.2 |
| 187 | Pleural Effusion with CC | 0.9891 | 3.0 |
| 188 | Pleural Effusion without CC/MCC | 0.7172 | 2.1 |
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.