MS-DRGs in MDC 16
Weights in this category range from 0.7380 (DRG 816) to 4.8460 (DRG 799); the change column compares FY2027 with FY2026.
| DRG | Title | Type | Weight | GMLOS | Change |
|---|---|---|---|---|---|
| 799 | Splenic Procedures with MCC | Surgical | 4.8460 | 7.0 | +7.0% |
| 800 | Splenic Procedures with CC | Surgical | 3.1490 | 4.2 | +12.1% |
| 801 | Splenic Procedures without CC/MCC | Surgical | 2.1930 | 2.3 | +14.9% |
| 802 | Other O.R. Procedures of the Blood and Blood Forming Organs with MCC | Surgical | 3.7000 | 7.7 | -7.1% |
| 803 | Other O.R. Procedures of the Blood and Blood Forming Organs with CC | Surgical | 1.9780 | 3.8 | +6.4% |
| 804 | Other O.R. Procedures of the Blood and Blood Forming Organs without CC/MCC | Surgical | 1.4220 | 1.7 | +4.9% |
| 808 | Major Hematological and Immunological Diagnoses Except Sickle Cell Crisis and Coagulation Disorders with MCC | Medical | 2.1710 | 5.1 | -1.7% |
| 809 | Major Hematological and Immunological Diagnoses Except Sickle Cell Crisis and Coagulation Disorders with CC | Medical | 1.2260 | 3.3 | -3.2% |
| 810 | Major Hematological and Immunological Diagnoses Except Sickle Cell Crisis and Coagulation Disorders without CC/MCC | Medical | 1.0750 | 2.5 | +2.7% |
| 811 | Red Blood Cell Disorders with MCC | Medical | 1.3990 | 3.7 | -0.4% |
| 812 | Red Blood Cell Disorders without MCC | Medical | 0.9240 | 2.8 | +0.7% |
| 813 | Coagulation Disorders | Medical | 1.5280 | 3.6 | +0.2% |
| 814 | Reticuloendothelial and Immunity Disorders with MCC | Medical | 2.0730 | 4.8 | -2.5% |
| 815 | Reticuloendothelial and Immunity Disorders with CC | Medical | 1.0440 | 3.0 | +3.0% |
| 816 | Reticuloendothelial and Immunity Disorders without CC/MCC | Medical | 0.7380 | 2.1 | +16.8% |
How to read this table
The relative weight is the payment multiplier CMS applies to a hospital's wage-adjusted standardized amount; a weight of 2.0 pays roughly twice an average inpatient case before outliers and add-ons. Geometric mean length of stay is the figure used in post-acute transfer calculations, so stays shorter than it in a transfer DRG are paid per diem. The change column compares the FY2027 final weight with FY2026; moves larger than two percent usually come from code reassignments in the final rule's Table 6 series or from updated cost data, and are worth re-checking in contract models and budgets before October 1. Surgical DRGs require a qualifying operating-room procedure; medical DRGs are reached when no such procedure is coded.
Frequently asked questions
How many MS-DRGs are in MDC 16?
15 MS-DRGs are assigned to MDC 16 (Diseases and Disorders of Blood, Blood Forming Organs and Immunologic Disorders) in the FY2027 v44 grouper: 6 surgical and 9 medical.
Which MDC 16 DRG has the highest weight?
DRG 799, Splenic Procedures with MCC, carries the highest FY2027 relative weight in this category at 4.8460; the lowest is DRG 816 at 0.7380.
How is a stay assigned to this MDC?
The grouper maps the principal diagnosis to MDC 16, then checks for a qualifying operating-room procedure to choose between the surgical and medical DRG partitions, and finally applies CC/MCC severity splits.
Sources
Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-01. Verify against the primary file before billing or contracting decisions.
- IPPS FY2027 Final Rule Table 5 (CMS-1849-F)Version v44 FY2027 · effective 2026-10-01 · file CMS-1849-F Table 5.txtSHA-256 01003dd571c1e2f5…
- IPPS FY2026 Final Rule Table 5 (CMS-1833-F)Version v43 FY2026 · effective 2025-10-01 · file CMS-1833-F Table 5.txtSHA-256 bf8c390d14b3cd3e…
Disclaimer
Operational reference compiled from CMS publications. Relative weights are national factors; actual payment depends on hospital-specific rates and adjustments. Not legal, clinical or billing advice.